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rustc_lint: avoid trimmed paths for ty_find_init_error

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This commit is contained in:
Dan Aloni 2020-09-03 14:33:55 +03:00
parent 51742be6d8
commit e7d7615105
2 changed files with 9 additions and 6 deletions
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5
compiler/rustc_lint/src/builtin.rs
View File

@ -40,6 +40,7 @@ use rustc_hir::{ForeignItemKind, GenericParamKind, PatKind};
use rustc_hir::{HirId, HirIdSet, Node};
use rustc_index::vec::Idx;
use rustc_middle::lint::LintDiagnosticBuilder;
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_middle::ty::subst::{GenericArgKind, Subst};
use rustc_middle::ty::{self, layout::LayoutError, Ty, TyCtxt};
use rustc_session::lint::FutureIncompatibleInfo;
@ -2040,7 +2041,9 @@ impl<'tcx> LateLintPass<'tcx> for InvalidValue {
// using zeroed or uninitialized memory.
// We are extremely conservative with what we warn about.
let conjured_ty = cx.typeck_results().expr_ty(expr);
if let Some((msg, span)) = ty_find_init_error(cx.tcx, conjured_ty, init) {
if let Some((msg, span)) =
with_no_trimmed_paths(|| ty_find_init_error(cx.tcx, conjured_ty, init))
{
cx.struct_span_lint(INVALID_VALUE, expr.span, |lint| {
let mut err = lint.build(&format!(
"the type `{}` does not permit {}",

10
src/test/ui/lint/uninitialized-zeroed.stderr
View File

@ -294,7 +294,7 @@ LL | let _val: NonNull<i32> = mem::zeroed();
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
|
= note: `NonNull<i32>` must be non-null
= note: `std::ptr::NonNull<i32>` must be non-null
error: the type `NonNull<i32>` does not permit being left uninitialized
--> $DIR/uninitialized-zeroed.rs:80:34
@ -305,7 +305,7 @@ LL | let _val: NonNull<i32> = mem::uninitialized();
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
|
= note: `NonNull<i32>` must be non-null
= note: `std::ptr::NonNull<i32>` must be non-null
error: the type `*const dyn Send` does not permit zero-initialization
--> $DIR/uninitialized-zeroed.rs:82:37
@ -415,7 +415,7 @@ LL | let _val: NonZeroU32 = mem::transmute(0);
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
|
= note: `NonZeroU32` must be non-null
= note: `std::num::NonZeroU32` must be non-null
error: the type `NonNull<i32>` does not permit zero-initialization
--> $DIR/uninitialized-zeroed.rs:104:34
@ -426,7 +426,7 @@ LL | let _val: NonNull<i32> = MaybeUninit::zeroed().assume_init();
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
|
= note: `NonNull<i32>` must be non-null
= note: `std::ptr::NonNull<i32>` must be non-null
error: the type `NonNull<i32>` does not permit being left uninitialized
--> $DIR/uninitialized-zeroed.rs:105:34
@ -437,7 +437,7 @@ LL | let _val: NonNull<i32> = MaybeUninit::uninit().assume_init();
| this code causes undefined behavior when executed
| help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
|
= note: `NonNull<i32>` must be non-null
= note: `std::ptr::NonNull<i32>` must be non-null
error: the type `bool` does not permit being left uninitialized
--> $DIR/uninitialized-zeroed.rs:106:26