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Auto merge of #2980 - RalfJung:span, r=RalfJung

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work around custom_mir span

Cc https://github.com/rust-lang/rust/issues/113549
This commit is contained in:
bors 2023-07-14 10:14:06 +00:00
commit 01c842acfa
2 changed files with 6 additions and 13 deletions
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6
src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.rs
View File

@ -5,9 +5,9 @@ pub struct S(i32);
#[custom_mir(dialect = "runtime", phase = "optimized")]
fn main() {
// FIXME: the span is not great (probably caused by custom MIR)
mir! { //~ERROR: uninitialized
mir! {
let unit: ();
let _observe: i32;
{
let non_copy = S(42);
// This could change `non_copy` in-place
@ -15,7 +15,7 @@ fn main() {
}
after_call = {
// So now we must not be allowed to observe non-copy again.
let _observe = non_copy.0;
_observe = non_copy.0; //~ERROR: uninitialized
Return()
}

13
src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.stderr
View File

@ -1,20 +1,13 @@
error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
--> $DIR/arg_inplace_observe_after.rs:LL:CC
|
LL | / mir! {
LL | | let unit: ();
LL | | {
LL | | let non_copy = S(42);
... |
LL | |
LL | | }
| |_____^ using uninitialized data, but this operation requires initialized memory
LL | _observe = non_copy.0;
| ^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory
|
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
= note: BACKTRACE:
= note: inside `main` at RUSTLIB/core/src/intrinsics/mir.rs:LL:CC
= note: this error originates in the macro `::core::intrinsics::mir::__internal_remove_let` which comes from the expansion of the macro `mir` (in Nightly builds, run with -Z macro-backtrace for more info)
= note: inside `main` at $DIR/arg_inplace_observe_after.rs:LL:CC
note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace