bjoernager/rust
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Add allocation information to undefined behaviour errors.

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This commit is contained in:
Hameer Abbasi 2021-02-01 12:02:31 +00:00
parent 6ff482bde5
commit c3ec0add8b
29 changed files with 351 additions and 33 deletions
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10
compiler/rustc_mir/src/const_eval/eval_queries.rs
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@ -5,6 +5,7 @@ use crate::interpret::{
Immediate, InternKind, InterpCx, InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking, Scalar,
ScalarMaybeUninit, StackPopCleanup,
};
use crate::util::pretty::display_allocation;
use rustc_errors::ErrorReported;
use rustc_hir::def::DefKind;
@ -360,6 +361,15 @@ pub fn eval_to_allocation_raw_provider<'tcx>(
"it is undefined behavior to use this value",
|mut diag| {
diag.note(note_on_undefined_behavior_error());
diag.note(&format!(
"the raw bytes of the constant ({}",
display_allocation(
*ecx.tcx,
ecx.tcx
.global_alloc(mplace.ptr.assert_ptr().alloc_id)
.unwrap_memory()
)
));
diag.emit();
},
))