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better ObligationCause for normalization errors in can_type_implement_copy

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This commit is contained in:
Michael Goulet 2022-02-06 13:03:28 -08:00
parent 3d127e2040
commit 8ba74369c2
8 changed files with 71 additions and 22 deletions
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11
compiler/rustc_lint/src/builtin.rs
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@ -51,7 +51,7 @@ use rustc_span::source_map::Spanned;
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::{BytePos, InnerSpan, MultiSpan, Span};
use rustc_target::abi::VariantIdx;
use rustc_trait_selection::traits::misc::can_type_implement_copy;
use rustc_trait_selection::traits::{self, misc::can_type_implement_copy};
use crate::nonstandard_style::{method_context, MethodLateContext};
@ -764,7 +764,14 @@ impl<'tcx> LateLintPass<'tcx> for MissingCopyImplementations {
if ty.is_copy_modulo_regions(cx.tcx.at(item.span), param_env) {
return;
}
if can_type_implement_copy(cx.tcx, param_env, ty).is_ok() {
if can_type_implement_copy(
cx.tcx,
param_env,
ty,
traits::ObligationCause::misc(item.span, item.hir_id()),
)
.is_ok()
{
cx.struct_span_lint(MISSING_COPY_IMPLEMENTATIONS, item.span, |lint| {
lint.build(
"type could implement `Copy`; consider adding `impl \