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Rollup merge of #115335 - reez12g:issue-114912, r=davidtwco

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fix overflow in array length computation

addressing https://github.com/rust-lang/rust/issues/114912
This commit is contained in:
Matthias Krüger 2023-09-11 17:03:29 +02:00 committed by GitHub
commit b99af95713
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1 changed files with 4 additions and 7 deletions
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11
compiler/rustc_hir_typeck/src/generator_interior/mod.rs
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@ -643,17 +643,14 @@ fn check_must_not_suspend_ty<'tcx>(
}
ty::Array(ty, len) => {
let descr_pre = &format!("{}array{} of ", data.descr_pre, plural_suffix);
let target_usize =
len.try_eval_target_usize(fcx.tcx, fcx.param_env).unwrap_or(0) as usize;
let plural_len = target_usize.saturating_add(1);
check_must_not_suspend_ty(
fcx,
ty,
hir_id,
SuspendCheckData {
descr_pre,
plural_len: len.try_eval_target_usize(fcx.tcx, fcx.param_env).unwrap_or(0)
as usize
+ 1,
..data
},
SuspendCheckData { descr_pre, plural_len, ..data },
)
}
// If drop tracking is enabled, we want to look through references, since the referent