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Auto merge of #112681 - GuillaumeGomez:rollup-rwn4086, r=GuillaumeGomez

Browse source 
Rollup of 8 pull requests

Successful merges:

 - #112403 (Prevent `.eh_frame` from being emitted for `-C panic=abort`)
 - #112517 (`suspicious_double_ref_op`: don't lint on `.borrow()`)
 - #112529 (Extend `unused_must_use` to cover block exprs)
 - #112614 (tweak suggestion for argument-position `impl ?Sized`)
 - #112654 (normalize closure output in equate_inputs_and_outputs)
 - #112660 (Migrate GUI colors test to original CSS color format)
 - #112664 (Add support for test tmpdir to fuchsia test runner)
 - #112669 (Fix comment for ptr alignment checks in codegen)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2023-06-15 22:54:43 +00:00
commit 0252b4093f
55 changed files with 578 additions and 213 deletions
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2
compiler/rustc_arena/src/lib.rs
View file

@ -67,7 +67,7 @@ struct ArenaChunk<T = u8> {
unsafe impl<#[may_dangle] T> Drop for ArenaChunk<T> {
fn drop(&mut self) {
unsafe { Box::from_raw(self.storage.as_mut()) };
unsafe { drop(Box::from_raw(self.storage.as_mut())) }
}
}

16
compiler/rustc_borrowck/src/type_check/input_output.rs
View file

@ -124,21 +124,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
// Return types are a bit more complex. They may contain opaque `impl Trait` types.
let mir_output_ty = body.local_decls[RETURN_PLACE].ty;
let output_span = body.local_decls[RETURN_PLACE].source_info.span;
if let Err(terr) = self.eq_types(
normalized_output_ty,
mir_output_ty,
Locations::All(output_span),
ConstraintCategory::BoringNoLocation,
) {
span_mirbug!(
self,
Location::START,
"equate_inputs_and_outputs: `{:?}=={:?}` failed with `{:?}`",
normalized_output_ty,
mir_output_ty,
terr
);
};
self.equate_normalized_input_or_output(normalized_output_ty, mir_output_ty, output_span);
}
#[instrument(skip(self), level = "debug")]

2
compiler/rustc_codegen_ssa/src/mir/block.rs
View file

@ -616,7 +616,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
AssertKind::MisalignedPointerDereference { ref required, ref found } => {
let required = self.codegen_operand(bx, required).immediate();
let found = self.codegen_operand(bx, found).immediate();
// It's `fn panic_bounds_check(index: usize, len: usize)`,
// It's `fn panic_misaligned_pointer_dereference(required: usize, found: usize)`,
// and `#[track_caller]` adds an implicit third argument.
(LangItem::PanicMisalignedPointerDereference, vec![required, found, location])
}

12
compiler/rustc_lint/messages.ftl
View file

@ -479,13 +479,11 @@ lint_requested_level = requested on the command line with `{$level} {$lint_name}
lint_supertrait_as_deref_target = `{$t}` implements `Deref` with supertrait `{$target_principal}` as target
.label = target type is set here
lint_suspicious_double_ref_op =
using `.{$call}()` on a double reference, which returns `{$ty}` instead of {$op ->
*[should_not_happen] [{$op}]
[deref] dereferencing
[borrow] borrowing
[clone] cloning
} the inner type
lint_suspicious_double_ref_clone =
using `.clone()` on a double reference, which returns `{$ty}` instead of cloning the inner type
lint_suspicious_double_ref_deref =
using `.deref()` on a double reference, which returns `{$ty}` instead of dereferencing the inner type
lint_trivial_untranslatable_diag = diagnostic with static strings only

51
compiler/rustc_lint/src/lints.rs
View file

@ -1231,11 +1231,15 @@ pub struct NoopMethodCallDiag<'a> {
}
#[derive(LintDiagnostic)]
#[diag(lint_suspicious_double_ref_op)]
pub struct SuspiciousDoubleRefDiag<'a> {
pub call: Symbol,
#[diag(lint_suspicious_double_ref_deref)]
pub struct SuspiciousDoubleRefDerefDiag<'a> {
pub ty: Ty<'a>,
}
#[derive(LintDiagnostic)]
#[diag(lint_suspicious_double_ref_clone)]
pub struct SuspiciousDoubleRefCloneDiag<'a> {
pub ty: Ty<'a>,
pub op: &'static str,
}
// pass_by_value.rs
@ -1551,8 +1555,29 @@ pub struct UnusedOp<'a> {
pub op: &'a str,
#[label]
pub label: Span,
#[suggestion(style = "verbose", code = "let _ = ", applicability = "maybe-incorrect")]
pub suggestion: Span,
#[subdiagnostic]
pub suggestion: UnusedOpSuggestion,
}
#[derive(Subdiagnostic)]
pub enum UnusedOpSuggestion {
#[suggestion(
lint_suggestion,
style = "verbose",
code = "let _ = ",
applicability = "maybe-incorrect"
)]
NormalExpr {
#[primary_span]
span: Span,
},
#[multipart_suggestion(lint_suggestion, style = "verbose", applicability = "maybe-incorrect")]
BlockTailExpr {
#[suggestion_part(code = "let _ = ")]
before_span: Span,
#[suggestion_part(code = ";")]
after_span: Span,
},
}
#[derive(LintDiagnostic)]
@ -1595,15 +1620,25 @@ pub struct UnusedDef<'a, 'b> {
}
#[derive(Subdiagnostic)]
pub enum UnusedDefSuggestion {
#[suggestion(
lint_suggestion,
style = "verbose",
code = "let _ = ",
applicability = "maybe-incorrect"
)]
pub struct UnusedDefSuggestion {
NormalExpr {
#[primary_span]
pub span: Span,
span: Span,
},
#[multipart_suggestion(lint_suggestion, style = "verbose", applicability = "maybe-incorrect")]
BlockTailExpr {
#[suggestion_part(code = "let _ = ")]
before_span: Span,
#[suggestion_part(code = ";")]
after_span: Span,
},
}
// Needed because of def_path_str

54
compiler/rustc_lint/src/noop_method_call.rs
View file

@ -1,5 +1,7 @@
use crate::context::LintContext;
use crate::lints::{NoopMethodCallDiag, SuspiciousDoubleRefDiag};
use crate::lints::{
NoopMethodCallDiag, SuspiciousDoubleRefCloneDiag, SuspiciousDoubleRefDerefDiag,
};
use crate::LateContext;
use crate::LateLintPass;
use rustc_hir::def::DefKind;
@ -76,22 +78,22 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
// We only care about method calls corresponding to the `Clone`, `Deref` and `Borrow`
// traits and ignore any other method call.
let did = match cx.typeck_results().type_dependent_def(expr.hir_id) {
// Verify we are dealing with a method/associated function.
Some((DefKind::AssocFn, did)) => match cx.tcx.trait_of_item(did) {
// Check that we're dealing with a trait method for one of the traits we care about.
Some(trait_id)
if matches!(
let Some((DefKind::AssocFn, did)) =
cx.typeck_results().type_dependent_def(expr.hir_id)
else {
return;
};
let Some(trait_id) = cx.tcx.trait_of_item(did) else { return };
if !matches!(
cx.tcx.get_diagnostic_name(trait_id),
Some(sym::Borrow | sym::Clone | sym::Deref)
) =>
{
did
}
_ => return,
},
_ => return,
) {
return;
};
let substs = cx
.tcx
.normalize_erasing_regions(cx.param_env, cx.typeck_results().node_substs(expr.hir_id));
@ -102,13 +104,6 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
// (Re)check that it implements the noop diagnostic.
let Some(name) = cx.tcx.get_diagnostic_name(i.def_id()) else { return };
let op = match name {
sym::noop_method_borrow => "borrow",
sym::noop_method_clone => "clone",
sym::noop_method_deref => "deref",
_ => return,
};
let receiver_ty = cx.typeck_results().expr_ty(receiver);
let expr_ty = cx.typeck_results().expr_ty_adjusted(expr);
let arg_adjustments = cx.typeck_results().expr_adjustments(receiver);
@ -129,11 +124,22 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
NoopMethodCallDiag { method: call.ident.name, receiver_ty, label: span },
);
} else {
cx.emit_spanned_lint(
match name {
// If `type_of(x) == T` and `x.borrow()` is used to get `&T`,
// then that should be allowed
sym::noop_method_borrow => return,
sym::noop_method_clone => cx.emit_spanned_lint(
SUSPICIOUS_DOUBLE_REF_OP,
span,
SuspiciousDoubleRefDiag { call: call.ident.name, ty: expr_ty, op },
)
SuspiciousDoubleRefCloneDiag { ty: expr_ty },
),
sym::noop_method_deref => cx.emit_spanned_lint(
SUSPICIOUS_DOUBLE_REF_OP,
span,
SuspiciousDoubleRefDerefDiag { ty: expr_ty },
),
_ => return,
}
}
}
}

94
compiler/rustc_lint/src/unused.rs
View file

@ -1,7 +1,8 @@
use crate::lints::{
PathStatementDrop, PathStatementDropSub, PathStatementNoEffect, UnusedAllocationDiag,
UnusedAllocationMutDiag, UnusedClosure, UnusedDef, UnusedDefSuggestion, UnusedDelim,
UnusedDelimSuggestion, UnusedGenerator, UnusedImportBracesDiag, UnusedOp, UnusedResult,
UnusedDelimSuggestion, UnusedGenerator, UnusedImportBracesDiag, UnusedOp, UnusedOpSuggestion,
UnusedResult,
};
use crate::Lint;
use crate::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
@ -93,7 +94,15 @@ declare_lint_pass!(UnusedResults => [UNUSED_MUST_USE, UNUSED_RESULTS]);
impl<'tcx> LateLintPass<'tcx> for UnusedResults {
fn check_stmt(&mut self, cx: &LateContext<'_>, s: &hir::Stmt<'_>) {
let hir::StmtKind::Semi(expr) = s.kind else { return; };
let hir::StmtKind::Semi(mut expr) = s.kind else { return; };
let mut expr_is_from_block = false;
while let hir::ExprKind::Block(blk, ..) = expr.kind
&& let hir::Block { expr: Some(e), .. } = blk
{
expr = e;
expr_is_from_block = true;
}
if let hir::ExprKind::Ret(..) = expr.kind {
return;
@ -113,6 +122,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
expr.span,
"output of future returned by ",
"",
expr_is_from_block,
)
{
// We have a bare `foo().await;` on an opaque type from an async function that was
@ -125,13 +135,13 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
let must_use_result = is_ty_must_use(cx, ty, &expr, expr.span);
let type_lint_emitted_or_suppressed = match must_use_result {
Some(path) => {
emit_must_use_untranslated(cx, &path, "", "", 1, false);
emit_must_use_untranslated(cx, &path, "", "", 1, false, expr_is_from_block);
true
}
None => false,
};
let fn_warned = check_fn_must_use(cx, expr);
let fn_warned = check_fn_must_use(cx, expr, expr_is_from_block);
if !fn_warned && type_lint_emitted_or_suppressed {
// We don't warn about unused unit or uninhabited types.
@ -176,7 +186,14 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
UnusedOp {
op: must_use_op,
label: expr.span,
suggestion: expr.span.shrink_to_lo(),
suggestion: if expr_is_from_block {
UnusedOpSuggestion::BlockTailExpr {
before_span: expr.span.shrink_to_lo(),
after_span: expr.span.shrink_to_hi(),
}
} else {
UnusedOpSuggestion::NormalExpr { span: expr.span.shrink_to_lo() }
},
},
);
op_warned = true;
@ -186,7 +203,11 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
cx.emit_spanned_lint(UNUSED_RESULTS, s.span, UnusedResult { ty });
}
fn check_fn_must_use(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool {
fn check_fn_must_use(
cx: &LateContext<'_>,
expr: &hir::Expr<'_>,
expr_is_from_block: bool,
) -> bool {
let maybe_def_id = match expr.kind {
hir::ExprKind::Call(ref callee, _) => {
match callee.kind {
@ -207,7 +228,14 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
_ => None,
};
if let Some(def_id) = maybe_def_id {
check_must_use_def(cx, def_id, expr.span, "return value of ", "")
check_must_use_def(
cx,
def_id,
expr.span,
"return value of ",
"",
expr_is_from_block,
)
} else {
false
}
@ -350,6 +378,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
span: Span,
descr_pre_path: &str,
descr_post_path: &str,
expr_is_from_block: bool,
) -> bool {
is_def_must_use(cx, def_id, span)
.map(|must_use_path| {
@ -360,6 +389,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
descr_post_path,
1,
false,
expr_is_from_block,
)
})
.is_some()
@ -373,6 +403,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
descr_post: &str,
plural_len: usize,
is_inner: bool,
expr_is_from_block: bool,
) {
let plural_suffix = pluralize!(plural_len);
@ -380,21 +411,51 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
MustUsePath::Suppressed => {}
MustUsePath::Boxed(path) => {
let descr_pre = &format!("{}boxed ", descr_pre);
emit_must_use_untranslated(cx, path, descr_pre, descr_post, plural_len, true);
emit_must_use_untranslated(
cx,
path,
descr_pre,
descr_post,
plural_len,
true,
expr_is_from_block,
);
}
MustUsePath::Opaque(path) => {
let descr_pre = &format!("{}implementer{} of ", descr_pre, plural_suffix);
emit_must_use_untranslated(cx, path, descr_pre, descr_post, plural_len, true);
emit_must_use_untranslated(
cx,
path,
descr_pre,
descr_post,
plural_len,
true,
expr_is_from_block,
);
}
MustUsePath::TraitObject(path) => {
let descr_post = &format!(" trait object{}{}", plural_suffix, descr_post);
emit_must_use_untranslated(cx, path, descr_pre, descr_post, plural_len, true);
emit_must_use_untranslated(
cx,
path,
descr_pre,
descr_post,
plural_len,
true,
expr_is_from_block,
);
}
MustUsePath::TupleElement(elems) => {
for (index, path) in elems {
let descr_post = &format!(" in tuple element {}", index);
emit_must_use_untranslated(
cx, path, descr_pre, descr_post, plural_len, true,
cx,
path,
descr_pre,
descr_post,
plural_len,
true,
expr_is_from_block,
);
}
}
@ -407,6 +468,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
descr_post,
plural_len.saturating_add(usize::try_from(*len).unwrap_or(usize::MAX)),
true,
expr_is_from_block,
);
}
MustUsePath::Closure(span) => {
@ -433,8 +495,14 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
cx,
def_id: *def_id,
note: *reason,
suggestion: (!is_inner)
.then_some(UnusedDefSuggestion { span: span.shrink_to_lo() }),
suggestion: (!is_inner).then_some(if expr_is_from_block {
UnusedDefSuggestion::BlockTailExpr {
before_span: span.shrink_to_lo(),
after_span: span.shrink_to_hi(),
}
} else {
UnusedDefSuggestion::NormalExpr { span: span.shrink_to_lo() }
}),
},
);
}

38
compiler/rustc_middle/src/ty/diagnostics.rs
View file

@ -14,8 +14,8 @@ use rustc_errors::{Applicability, Diagnostic, DiagnosticArgValue, IntoDiagnostic
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::DefId;
use rustc_hir::WherePredicate;
use rustc_span::Span;
use rustc_hir::{PredicateOrigin, WherePredicate};
use rustc_span::{BytePos, Span};
use rustc_type_ir::sty::TyKind::*;
impl<'tcx> IntoDiagnosticArg for Ty<'tcx> {
@ -156,10 +156,11 @@ enum SuggestChangingConstraintsMessage<'a> {
RestrictBoundFurther,
RestrictType { ty: &'a str },
RestrictTypeFurther { ty: &'a str },
RemovingQSized,
RemoveMaybeUnsized,
ReplaceMaybeUnsizedWithSized,
}
fn suggest_removing_unsized_bound(
fn suggest_changing_unsized_bound(
generics: &hir::Generics<'_>,
suggestions: &mut Vec<(Span, String, SuggestChangingConstraintsMessage<'_>)>,
param: &hir::GenericParam<'_>,
@ -183,15 +184,28 @@ fn suggest_removing_unsized_bound(
if poly.trait_ref.trait_def_id() != def_id {
continue;
}
if predicate.origin == PredicateOrigin::ImplTrait && predicate.bounds.len() == 1 {
// For `impl ?Sized` with no other bounds, suggest `impl Sized` instead.
let bound_span = bound.span();
if bound_span.can_be_used_for_suggestions() {
let question_span = bound_span.with_hi(bound_span.lo() + BytePos(1));
suggestions.push((
question_span,
String::new(),
SuggestChangingConstraintsMessage::ReplaceMaybeUnsizedWithSized,
));
}
} else {
let sp = generics.span_for_bound_removal(where_pos, pos);
suggestions.push((
sp,
String::new(),
SuggestChangingConstraintsMessage::RemovingQSized,
SuggestChangingConstraintsMessage::RemoveMaybeUnsized,
));
}
}
}
}
/// Suggest restricting a type param with a new bound.
///
@ -238,14 +252,11 @@ pub fn suggest_constraining_type_params<'a>(
{
let mut sized_constraints =
constraints.extract_if(|(_, def_id)| *def_id == tcx.lang_items().sized_trait());
if let Some((constraint, def_id)) = sized_constraints.next() {
if let Some((_, def_id)) = sized_constraints.next() {
applicability = Applicability::MaybeIncorrect;
err.span_label(
param.span,
format!("this type parameter needs to be `{}`", constraint),
);
suggest_removing_unsized_bound(generics, &mut suggestions, param, def_id);
err.span_label(param.span, "this type parameter needs to be `Sized`");
suggest_changing_unsized_bound(generics, &mut suggestions, param, def_id);
}
}
@ -395,9 +406,12 @@ pub fn suggest_constraining_type_params<'a>(
SuggestChangingConstraintsMessage::RestrictTypeFurther { ty } => {
Cow::from(format!("consider further restricting type parameter `{}`", ty))
}
SuggestChangingConstraintsMessage::RemovingQSized => {
SuggestChangingConstraintsMessage::RemoveMaybeUnsized => {
Cow::from("consider removing the `?Sized` bound to make the type parameter `Sized`")
}
SuggestChangingConstraintsMessage::ReplaceMaybeUnsizedWithSized => {
Cow::from("consider replacing `?Sized` with `Sized`")
}
};
err.span_suggestion_verbose(span, msg, suggestion, applicability);

7
compiler/rustc_mir_transform/src/check_alignment.rs
View file

@ -9,6 +9,7 @@ use rustc_middle::mir::{
};
use rustc_middle::ty::{Ty, TyCtxt, TypeAndMut};
use rustc_session::Session;
use rustc_target::spec::PanicStrategy;
pub struct CheckAlignment;
@ -236,7 +237,11 @@ fn insert_alignment_check<'tcx>(
required: Operand::Copy(alignment),
found: Operand::Copy(addr),
}),
unwind: UnwindAction::Terminate,
unwind: if tcx.sess.panic_strategy() == PanicStrategy::Unwind {
UnwindAction::Terminate
} else {
UnwindAction::Unreachable
},
},
});
}

2
library/core/src/primitive_docs.rs
View file

@ -308,7 +308,7 @@ mod prim_never {}
///
/// ```no_run
/// // Undefined behaviour
/// unsafe { char::from_u32_unchecked(0x110000) };
/// let _ = unsafe { char::from_u32_unchecked(0x110000) };
/// ```
///
/// USVs are also the exact set of values that may be encoded in UTF-8. Because

2
library/core/tests/ptr.rs
View file

@ -1001,7 +1001,7 @@ fn nonnull_tagged_pointer_with_provenance() {
assert_eq!(p.tag(), 3);
assert_eq!(unsafe { *p.pointer().as_ptr() }, 10);
unsafe { Box::from_raw(p.pointer().as_ptr()) };
unsafe { drop(Box::from_raw(p.pointer().as_ptr())) };
/// A non-null pointer type which carries several bits of metadata and maintains provenance.
#[repr(transparent)]

2
library/std/src/primitive_docs.rs
View file

@ -308,7 +308,7 @@ mod prim_never {}
///
/// ```no_run
/// // Undefined behaviour
/// unsafe { char::from_u32_unchecked(0x110000) };
/// let _ = unsafe { char::from_u32_unchecked(0x110000) };
/// ```
///
/// USVs are also the exact set of values that may be encoded in UTF-8. Because

13
src/ci/docker/scripts/fuchsia-test-runner.py
View file

@ -171,7 +171,6 @@ class TestEnvironment:
def home_dir(self):
return os.path.join(self.tmp_dir(), "user-home")
def start_ffx_isolation(self):
# Most of this is translated directly from ffx's isolate library
os.mkdir(self.ffx_isolate_dir())
@ -424,7 +423,7 @@ class TestEnvironment:
)
# Create lockfiles
open(self.pm_lockfile_path(), 'a').close()
open(self.pm_lockfile_path(), "a").close()
# Write to file
self.write_to_file()
@ -458,6 +457,7 @@ class TestEnvironment:
],
use: [
{{ storage: "data", path: "/data" }},
{{ storage: "tmp", path: "/tmp" }},
{{ protocol: [ "fuchsia.process.Launcher" ] }},
{{ protocol: [ "fuchsia.posix.socket.Provider" ] }}
],
@ -571,6 +571,9 @@ class TestEnvironment:
if os.getenv("RUST_BACKTRACE") == None:
env_vars += f'\n "RUST_BACKTRACE=0",'
# Use /tmp as the test temporary directory
env_vars += f'\n "RUST_TEST_TMPDIR=/tmp",'
cml.write(
self.CML_TEMPLATE.format(env_vars=env_vars, exe_name=exe_name)
)
@ -642,7 +645,7 @@ class TestEnvironment:
log("Publishing package to repo...")
# Publish package to repo
with open(self.pm_lockfile_path(), 'w') as pm_lockfile:
with open(self.pm_lockfile_path(), "w") as pm_lockfile:
fcntl.lockf(pm_lockfile.fileno(), fcntl.LOCK_EX)
subprocess.check_call(
[
@ -1045,9 +1048,7 @@ def main():
)
debug_parser.set_defaults(func=debug)
syslog_parser = subparsers.add_parser(
"syslog", help="prints the device syslog"
)
syslog_parser = subparsers.add_parser("syslog", help="prints the device syslog")
syslog_parser.set_defaults(func=syslog)
args = parser.parse_args()

3
src/tools/clippy/tests/ui/transmute_ptr_to_ref.fixed
View file

@ -2,6 +2,7 @@
#![warn(clippy::transmute_ptr_to_ref)]
#![allow(clippy::match_single_binding)]
#![allow(unused_must_use)]
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
let _: &T = &*p;
@ -38,7 +39,7 @@ fn _issue1231() {
type Bar<'a> = &'a u8;
let raw = 42 as *const i32;
unsafe { &*(raw as *const u8) };
let _ = unsafe { &*(raw as *const u8) };
}
unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {

3
src/tools/clippy/tests/ui/transmute_ptr_to_ref.rs
View file

@ -2,6 +2,7 @@
#![warn(clippy::transmute_ptr_to_ref)]
#![allow(clippy::match_single_binding)]
#![allow(unused_must_use)]
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
let _: &T = std::mem::transmute(p);
@ -38,7 +39,7 @@ fn _issue1231() {
type Bar<'a> = &'a u8;
let raw = 42 as *const i32;
unsafe { std::mem::transmute::<_, Bar>(raw) };
let _ = unsafe { std::mem::transmute::<_, Bar>(raw) };
}
unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {

46
src/tools/clippy/tests/ui/transmute_ptr_to_ref.stderr
View file

@ -1,5 +1,5 @@
error: transmute from a pointer type (`*const T`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:7:17
--> $DIR/transmute_ptr_to_ref.rs:8:17
|
LL | let _: &T = std::mem::transmute(p);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*p`
@ -7,127 +7,127 @@ LL | let _: &T = std::mem::transmute(p);
= note: `-D clippy::transmute-ptr-to-ref` implied by `-D warnings`
error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:10:21
--> $DIR/transmute_ptr_to_ref.rs:11:21
|
LL | let _: &mut T = std::mem::transmute(m);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *m`
error: transmute from a pointer type (`*mut T`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:13:17
--> $DIR/transmute_ptr_to_ref.rs:14:17
|
LL | let _: &T = std::mem::transmute(m);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*m`
error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:16:21
--> $DIR/transmute_ptr_to_ref.rs:17:21
|
LL | let _: &mut T = std::mem::transmute(p as *mut T);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(p as *mut T)`
error: transmute from a pointer type (`*const U`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:19:17
--> $DIR/transmute_ptr_to_ref.rs:20:17
|
LL | let _: &T = std::mem::transmute(o);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(o as *const T)`
error: transmute from a pointer type (`*mut U`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:22:21
--> $DIR/transmute_ptr_to_ref.rs:23:21
|
LL | let _: &mut T = std::mem::transmute(om);
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(om as *mut T)`
error: transmute from a pointer type (`*mut U`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:25:17
--> $DIR/transmute_ptr_to_ref.rs:26:17
|
LL | let _: &T = std::mem::transmute(om);
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(om as *const T)`
error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, u8>`)
--> $DIR/transmute_ptr_to_ref.rs:35:32
--> $DIR/transmute_ptr_to_ref.rs:36:32
|
LL | let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<_>>()`
error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, &u8>`)
--> $DIR/transmute_ptr_to_ref.rs:37:33
--> $DIR/transmute_ptr_to_ref.rs:38:33
|
LL | let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<&_>>()`
error: transmute from a pointer type (`*const i32`) to a reference type (`&u8`)
--> $DIR/transmute_ptr_to_ref.rs:41:14
--> $DIR/transmute_ptr_to_ref.rs:42:22
|
LL | unsafe { std::mem::transmute::<_, Bar>(raw) };
LL | let _ = unsafe { std::mem::transmute::<_, Bar>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(raw as *const u8)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:46:14
--> $DIR/transmute_ptr_to_ref.rs:47:14
|
LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:47:14
--> $DIR/transmute_ptr_to_ref.rs:48:14
|
LL | 1 => std::mem::transmute(y),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:48:14
--> $DIR/transmute_ptr_to_ref.rs:49:14
|
LL | 2 => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:49:14
--> $DIR/transmute_ptr_to_ref.rs:50:14
|
LL | _ => std::mem::transmute::<_, &&'b u32>(y),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&'b u32>()`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:57:19
--> $DIR/transmute_ptr_to_ref.rs:58:19
|
LL | let _: &u32 = std::mem::transmute(a);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:58:19
--> $DIR/transmute_ptr_to_ref.rs:59:19
|
LL | let _: &u32 = std::mem::transmute::<_, &u32>(a);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a.cast::<u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:60:14
--> $DIR/transmute_ptr_to_ref.rs:61:14
|
LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:61:14
--> $DIR/transmute_ptr_to_ref.rs:62:14
|
LL | _ => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:69:19
--> $DIR/transmute_ptr_to_ref.rs:70:19
|
LL | let _: &u32 = std::mem::transmute(a);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:70:19
--> $DIR/transmute_ptr_to_ref.rs:71:19
|
LL | let _: &u32 = std::mem::transmute::<_, &u32>(a);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(a as *const u32)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:72:14
--> $DIR/transmute_ptr_to_ref.rs:73:14
|
LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &u32)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:73:14
--> $DIR/transmute_ptr_to_ref.rs:74:14
|
LL | _ => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &'b u32)`

2
src/tools/miri/tests/fail/dangling_pointers/storage_dead_dangling.rs
View file

@ -10,7 +10,7 @@ fn fill(v: &mut i32) {
}
fn evil() {
unsafe { &mut *(LEAK as *mut i32) }; //~ ERROR: is a dangling pointer
let _ = unsafe { &mut *(LEAK as *mut i32) }; //~ ERROR: is a dangling pointer
}
fn main() {

2
src/tools/miri/tests/fail/dangling_pointers/storage_dead_dangling.stderr
View file

@ -1,7 +1,7 @@
error: Undefined Behavior: dereferencing pointer failed: $HEX[noalloc] is a dangling pointer (it has no provenance)
--> $DIR/storage_dead_dangling.rs:LL:CC
|
LL | unsafe { &mut *(LEAK as *mut i32) };
LL | let _ = unsafe { &mut *(LEAK as *mut i32) };
| ^^^^^^^^^^^^^^^^^^^^^^^^ dereferencing pointer failed: $HEX[noalloc] is a dangling pointer (it has no provenance)
|
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior

2
src/tools/miri/tests/fail/intrinsics/uninit_uninhabited_type.rs
View file

@ -2,6 +2,6 @@
#[allow(deprecated, invalid_value)]
fn main() {
unsafe { std::mem::uninitialized::<!>() };
let _ = unsafe { std::mem::uninitialized::<!>() };
//~^ ERROR: attempted to instantiate uninhabited type `!`
}

2
src/tools/miri/tests/fail/intrinsics/uninit_uninhabited_type.stderr
View file

@ -1,7 +1,7 @@
error: abnormal termination: aborted execution: attempted to instantiate uninhabited type `!`
--> $DIR/uninit_uninhabited_type.rs:LL:CC
|
LL | unsafe { std::mem::uninitialized::<!>() };
LL | let _ = unsafe { std::mem::uninitialized::<!>() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ aborted execution: attempted to instantiate uninhabited type `!`
|
= note: inside `main` at $DIR/uninit_uninhabited_type.rs:LL:CC

2
src/tools/miri/tests/fail/intrinsics/zero_fn_ptr.rs
View file

@ -1,5 +1,5 @@
#[allow(deprecated, invalid_value)]
fn main() {
unsafe { std::mem::zeroed::<fn()>() };
let _ = unsafe { std::mem::zeroed::<fn()>() };
//~^ ERROR: attempted to zero-initialize type `fn()`, which is invalid
}

2
src/tools/miri/tests/fail/intrinsics/zero_fn_ptr.stderr
View file

@ -1,7 +1,7 @@
error: abnormal termination: aborted execution: attempted to zero-initialize type `fn()`, which is invalid
--> $DIR/zero_fn_ptr.rs:LL:CC
|
LL | unsafe { std::mem::zeroed::<fn()>() };
LL | let _ = unsafe { std::mem::zeroed::<fn()>() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ aborted execution: attempted to zero-initialize type `fn()`, which is invalid
|
= note: inside `main` at $DIR/zero_fn_ptr.rs:LL:CC

10
tests/run-make/panic-abort-eh_frame/Makefile Normal file
View file

@ -0,0 +1,10 @@
# only-linux
#
# This test ensures that `panic=abort` code (without `C-unwind`, that is) should not have any
# unwinding related `.eh_frame` sections emitted.
include ../tools.mk
all:
$(RUSTC) foo.rs --crate-type=lib --emit=obj=$(TMPDIR)/foo.o -Cpanic=abort
objdump --dwarf=frames $(TMPDIR)/foo.o | $(CGREP) -v 'DW_CFA'

10
tests/run-make/panic-abort-eh_frame/foo.rs Normal file
View file

@ -0,0 +1,10 @@
#![no_std]
#[panic_handler]
fn handler(_: &core::panic::PanicInfo<'_>) -> ! {
loop {}
}
pub unsafe fn oops(x: *const u32) -> u32 {
*x
}

2
tests/ui/const-generics/const-argument-if-length.full.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/const-argument-if-length.rs:15:12
|
LL | pub struct AtLeastByte<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: T,
| ^ doesn't have a size known at compile-time
|

2
tests/ui/const-generics/const-argument-if-length.min.stderr
View file

@ -11,7 +11,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/const-argument-if-length.rs:15:12
|
LL | pub struct AtLeastByte<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: T,
| ^ doesn't have a size known at compile-time
|

4
tests/ui/dst/dst-object-from-unsized-type.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/dst-object-from-unsized-type.rs:8:23
|
LL | fn test1<T: ?Sized + Foo>(t: &T) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let u: &dyn Foo = t;
| ^ doesn't have a size known at compile-time
|
@ -17,7 +17,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/dst-object-from-unsized-type.rs:13:23
|
LL | fn test2<T: ?Sized + Foo>(t: &T) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let v: &dyn Foo = t as &dyn Foo;
| ^ doesn't have a size known at compile-time
|

2
tests/ui/generic-associated-types/issue-88287.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
--> $DIR/issue-88287.rs:34:9
|
LL | type SearchFutureTy<'f, A, B: 'f>
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | async move { todo!() }
| ^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time

4
tests/ui/issues/issue-1460.stderr
View file

@ -1,8 +1,8 @@
warning: unused closure that must be used
--> $DIR/issue-1460.rs:6:5
--> $DIR/issue-1460.rs:6:6
|
LL | {|i: u32| if 1 == i { }};
| ^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: closures are lazy and do nothing unless called
= note: `#[warn(unused_must_use)]` on by default

17
tests/ui/lint/issue-112489.rs Normal file
View file

@ -0,0 +1,17 @@
// check-pass
use std::borrow::Borrow;
struct S;
trait T: Sized {
fn foo(self) {}
}
impl T for S {}
impl T for &S {}
fn main() {
let s = S;
s.borrow().foo();
s.foo();
}

36
tests/ui/lint/unused/must-use-block-expr.fixed Normal file
View file

@ -0,0 +1,36 @@
// run-rustfix
// check-pass
#![warn(unused_must_use)]
#[must_use]
fn foo() -> i32 {
42
}
fn bar() {
{
let _ = foo();
//~^ WARN unused return value
}
}
fn baz() {
{
let _ = foo();
//~^ WARN unused return value
};
}
fn main() {
bar();
baz();
{
let _ = 1 + 2;
//~^ WARN unused arithmetic operation
}
{
let _ = 1 + 2;
//~^ WARN unused arithmetic operation
};
}

36
tests/ui/lint/unused/must-use-block-expr.rs Normal file
View file

@ -0,0 +1,36 @@
// run-rustfix
// check-pass
#![warn(unused_must_use)]
#[must_use]
fn foo() -> i32 {
42
}
fn bar() {
{
foo();
//~^ WARN unused return value
}
}
fn baz() {
{
foo()
//~^ WARN unused return value
};
}
fn main() {
bar();
baz();
{
1 + 2;
//~^ WARN unused arithmetic operation
}
{
1 + 2
//~^ WARN unused arithmetic operation
};
}

51
tests/ui/lint/unused/must-use-block-expr.stderr Normal file
View file

@ -0,0 +1,51 @@
warning: unused return value of `foo` that must be used
--> $DIR/must-use-block-expr.rs:13:9
|
LL | foo();
| ^^^^^
|
note: the lint level is defined here
--> $DIR/must-use-block-expr.rs:4:9
|
LL | #![warn(unused_must_use)]
| ^^^^^^^^^^^^^^^
help: use `let _ = ...` to ignore the resulting value
|
LL | let _ = foo();
| +++++++
warning: unused return value of `foo` that must be used
--> $DIR/must-use-block-expr.rs:20:9
|
LL | foo()
| ^^^^^
|
help: use `let _ = ...` to ignore the resulting value
|
LL | let _ = foo();
| +++++++ +
warning: unused arithmetic operation that must be used
--> $DIR/must-use-block-expr.rs:29:9
|
LL | 1 + 2;
| ^^^^^ the arithmetic operation produces a value
|
help: use `let _ = ...` to ignore the resulting value
|
LL | let _ = 1 + 2;
| +++++++
warning: unused arithmetic operation that must be used
--> $DIR/must-use-block-expr.rs:33:9
|
LL | 1 + 2
| ^^^^^ the arithmetic operation produces a value
|
help: use `let _ = ...` to ignore the resulting value
|
LL | let _ = 1 + 2;
| +++++++ +
warning: 4 warnings emitted

49
tests/ui/nll/issue-112604-closure-output-normalize.rs Normal file
View file

@ -0,0 +1,49 @@
//check-pass
use higher_kinded_types::*;
mod higher_kinded_types {
pub(crate) trait HKT {
type Of<'lt>;
}
pub(crate) trait WithLifetime<'lt> {
type T;
}
impl<T: ?Sized + for<'any> WithLifetime<'any>> HKT for T {
type Of<'lt> = <T as WithLifetime<'lt>>::T;
}
}
trait Trait {
type Gat<'lt>;
}
impl Trait for () {
type Gat<'lt> = ();
}
/// Same as `Trait`, but using HKTs rather than GATs
trait HTrait {
type Hat: ?Sized + HKT;
}
impl<T: Trait> HTrait for T {
type Hat = dyn for<'lt> WithLifetime<'lt, T = T::Gat<'lt>>;
}
impl<Hat: ?Sized + HKT> Trait for Box<dyn '_ + HTrait<Hat = Hat>> {
type Gat<'lt> = Hat::Of<'lt>;
}
fn existential() -> impl for<'a> Trait<Gat<'a> = ()> {}
fn dyn_hoops<T: Trait>(
_: T,
) -> Box<dyn HTrait<Hat = dyn for<'a> WithLifetime<'a, T = T::Gat<'a>>>> {
loop {}
}
fn main() {
let _ = || -> _ { dyn_hoops(existential()) };
}

2
tests/ui/offset-of/offset-of-dst-field.stderr
View file

@ -70,7 +70,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/offset-of-dst-field.rs:50:5
|
LL | fn generic_with_maybe_sized<T: ?Sized>() -> usize {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | offset_of!(Delta<T>, z)
| ^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|

2
tests/ui/packed/issue-27060-2.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/issue-27060-2.rs:3:11
|
LL | pub struct Bad<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | data: T,
| ^ doesn't have a size known at compile-time
|

2
tests/ui/suggestions/adt-param-with-implicit-sized-bound.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/adt-param-with-implicit-sized-bound.rs:25:9
|
LL | struct Struct5<T: ?Sized>{
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | _t: X<T>,
| ^^^^ doesn't have a size known at compile-time
|

6
tests/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
@ -33,7 +33,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn bar<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
@ -58,7 +58,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn qux<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16

4
tests/ui/trait-bounds/apit-unsized.rs Normal file
View file

@ -0,0 +1,4 @@
fn foo(_: impl Iterator<Item = i32> + ?Sized) {} //~ ERROR [E0277]
fn bar(_: impl ?Sized) {} //~ ERROR [E0277]
fn main() {}

41
tests/ui/trait-bounds/apit-unsized.stderr Normal file
View file

@ -0,0 +1,41 @@
error[E0277]: the size for values of type `impl Iterator<Item = i32> + ?Sized` cannot be known at compilation time
--> $DIR/apit-unsized.rs:1:8
|
LL | fn foo(_: impl Iterator<Item = i32> + ?Sized) {}
| ^ ---------------------------------- this type parameter needs to be `Sized`
| |
| doesn't have a size known at compile-time
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
|
LL - fn foo(_: impl Iterator<Item = i32> + ?Sized) {}
LL + fn foo(_: impl Iterator<Item = i32>) {}
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn foo(_: &impl Iterator<Item = i32> + ?Sized) {}
| +
error[E0277]: the size for values of type `impl ?Sized` cannot be known at compilation time
--> $DIR/apit-unsized.rs:2:8
|
LL | fn bar(_: impl ?Sized) {}
| ^ ----------- this type parameter needs to be `Sized`
| |
| doesn't have a size known at compile-time
|
= help: unsized fn params are gated as an unstable feature
help: consider replacing `?Sized` with `Sized`
|
LL - fn bar(_: impl ?Sized) {}
LL + fn bar(_: impl Sized) {}
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn bar(_: &impl ?Sized) {}
| +
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.

30
tests/ui/trait-bounds/unsized-bound.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
LL | impl<A, B> Trait<(A, B)> for (A, B) where A: ?Sized, B: ?Sized, {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B)`
note: required by a bound in `Trait`
@ -28,7 +28,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A, B> Trait<(A, B)> for (A, B) where A: ?Sized, B: ?Sized, {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -43,7 +43,7 @@ error[E0277]: the size for values of type `C` cannot be known at compilation tim
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B, C)`
note: required by a bound in `Trait`
@ -65,9 +65,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
--> $DIR/unsized-bound.rs:5:52
|
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized` ^^^^^^^^^ doesn't have a size known at compile-time
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -80,9 +78,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
--> $DIR/unsized-bound.rs:5:52
|
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized` ^^^^^^^^^ doesn't have a size known at compile-time
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -97,7 +93,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
LL | impl<A: ?Sized, B: ?Sized> Trait2<(A, B)> for (A, B) {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B)`
note: required by a bound in `Trait2`
@ -121,7 +117,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A: ?Sized, B: ?Sized> Trait2<(A, B)> for (A, B) {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -136,7 +132,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A> Trait3<A> for A where A: ?Sized {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait3`
--> $DIR/unsized-bound.rs:13:14
@ -159,7 +155,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A: ?Sized> Trait4<A> for A {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait4`
--> $DIR/unsized-bound.rs:16:14
@ -182,7 +178,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X, Y> Trait5<X, Y> for X where X: ?Sized {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait5`
--> $DIR/unsized-bound.rs:19:14
@ -205,7 +201,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized, Y> Trait6<X, Y> for X {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait6`
--> $DIR/unsized-bound.rs:22:14
@ -228,7 +224,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
LL | impl<X, Y> Trait7<X, Y> for X where Y: ?Sized {}
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait7`
--> $DIR/unsized-bound.rs:25:17
@ -251,7 +247,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
LL | impl<X, Y: ?Sized> Trait8<X, Y> for X {}
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait8`
--> $DIR/unsized-bound.rs:28:17

4
tests/ui/traits/suggest-where-clause.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `U` cannot be known at compilation tim
--> $DIR/suggest-where-clause.rs:7:20
|
LL | fn check<T: Iterator, U: ?Sized>() {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | // suggest a where-clause, if needed
LL | mem::size_of::<U>();
| ^ doesn't have a size known at compile-time
@ -19,7 +19,7 @@ error[E0277]: the size for values of type `U` cannot be known at compilation tim
--> $DIR/suggest-where-clause.rs:10:20
|
LL | fn check<T: Iterator, U: ?Sized>() {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | mem::size_of::<Misc<U>>();
| ^^^^^^^ doesn't have a size known at compile-time

6
tests/ui/union/union-sized-field.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:4:12
|
LL | union Foo<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: ManuallyDrop<T>,
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
@ -28,7 +28,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:9:12
|
LL | struct Foo2<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: ManuallyDrop<T>,
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
@ -54,7 +54,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:15:11
|
LL | enum Foo3<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | Value(ManuallyDrop<T>),
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|

2
tests/ui/unsized/unsized-bare-typaram.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo<T: ?Sized>() { bar::<T>() }
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `bar`
--> $DIR/unsized-bare-typaram.rs:1:8

2
tests/ui/unsized/unsized-enum.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Foo`
--> $DIR/unsized-enum.rs:4:10

8
tests/ui/unsized/unsized-enum2.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `W` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:23:8
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | // parameter
LL | VA(W),
| ^ doesn't have a size known at compile-time
@ -27,7 +27,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:25:11
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VB{x: X},
| ^ doesn't have a size known at compile-time
@ -52,7 +52,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:27:15
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VC(isize, Y),
| ^ doesn't have a size known at compile-time
@ -77,7 +77,7 @@ error[E0277]: the size for values of type `Z` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:29:21
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VD{u: isize, x: Z},
| ^ doesn't have a size known at compile-time

2
tests/ui/unsized/unsized-fn-arg.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn f<T: ?Sized>(t: T) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`

2
tests/ui/unsized/unsized-inherent-impl-self-type.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> S5<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `S5`
--> $DIR/unsized-inherent-impl-self-type.rs:5:11

4
tests/ui/unsized/unsized-struct.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Foo`
--> $DIR/unsized-struct.rs:4:12
@ -30,7 +30,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required because it appears within the type `Bar<T>`
--> $DIR/unsized-struct.rs:11:8

2
tests/ui/unsized/unsized-trait-impl-self-type.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> T3<X> for S5<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `S5`
--> $DIR/unsized-trait-impl-self-type.rs:8:11

2
tests/ui/unsized/unsized-trait-impl-trait-arg.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> T2<X> for S4<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `T2`
--> $DIR/unsized-trait-impl-trait-arg.rs:4:10

12
tests/ui/unsized/unsized3.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:7:13
|
LL | fn f1<X: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f2::<X>(x);
| ------- ^ doesn't have a size known at compile-time
| |
@ -27,7 +27,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:18:13
|
LL | fn f3<X: ?Sized + T>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f4::<X>(x);
| ------- ^ doesn't have a size known at compile-time
| |
@ -52,7 +52,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:33:8
|
LL | fn f8<X: ?Sized>(x1: &S<X>, x2: &S<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(x1);
| -- ^^ doesn't have a size known at compile-time
| |
@ -82,7 +82,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:40:5
|
LL | fn f9<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(*x1, 34));
| ^^ doesn't have a size known at compile-time
|
@ -102,7 +102,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:45:9
|
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(32, *x1));
| ^^^^^^^^^ doesn't have a size known at compile-time
|
@ -123,7 +123,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:45:8
|
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(32, *x1));
| -- ^^^^^^^^^^ doesn't have a size known at compile-time
| |

8
tests/ui/unsized/unsized5.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:4:9
|
LL | struct S1<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f1: X,
| ^ doesn't have a size known at compile-time
|
@ -26,7 +26,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:10:8
|
LL | struct S2<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f: isize,
LL | g: X,
| ^ doesn't have a size known at compile-time
@ -87,7 +87,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:25:8
|
LL | enum E<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | V1(X, isize),
| ^ doesn't have a size known at compile-time
|
@ -111,7 +111,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:29:12
|
LL | enum F<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | V2{f1: X, f: isize},
| ^ doesn't have a size known at compile-time
|

26
tests/ui/unsized/unsized6.stderr
View file

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized6.rs:9:9
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: Y;
| ^ doesn't have a size known at compile-time
@ -23,7 +23,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:7:12
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let _: W; // <-- this is OK, no bindings created, no initializer.
LL | let _: (isize, (X, isize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -39,7 +39,7 @@ error[E0277]: the size for values of type `Z` cannot be known at compilation tim
--> $DIR/unsized6.rs:11:12
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: (isize, (Z, usize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -55,7 +55,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:15:9
|
LL | fn f2<X: ?Sized, Y: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X;
| ^ doesn't have a size known at compile-time
|
@ -75,7 +75,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized6.rs:17:12
|
LL | fn f2<X: ?Sized, Y: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: (isize, (Y, isize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -91,7 +91,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:22:9
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X = *x1;
| ^ doesn't have a size known at compile-time
|
@ -111,7 +111,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:24:9
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y = *x2;
| ^ doesn't have a size known at compile-time
@ -128,7 +128,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:26:10
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let (y, z) = (*x3, 4);
| ^ doesn't have a size known at compile-time
@ -145,7 +145,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:30:9
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X = *x1;
| ^ doesn't have a size known at compile-time
|
@ -165,7 +165,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:32:9
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y = *x2;
| ^ doesn't have a size known at compile-time
@ -182,7 +182,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:34:10
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let (y, z) = (*x3, 4);
| ^ doesn't have a size known at compile-time
@ -201,7 +201,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | fn g1<X: ?Sized>(x: X) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -220,7 +220,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | fn g2<X: ?Sized + T>(x: X) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`

2
tests/ui/unsized/unsized7.stderr
View file

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized + T> T1<X> for S3<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `T1`
--> $DIR/unsized7.rs:7:10