Detect negative literal inferred to unsigned integer#146042
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bors merged 2 commits intorust-lang:masterfrom Sep 1, 2025
Merged
Detect negative literal inferred to unsigned integer#146042bors merged 2 commits intorust-lang:masterfrom
bors merged 2 commits intorust-lang:masterfrom
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```
error[E0277]: the trait bound `usize: Neg` is not satisfied
--> $DIR/negative-literal-infered-to-unsigned.rs:2:14
|
LL | for x in -5..5 {
| ^^ the trait `Neg` is not implemented for `usize`
|
help: consider specifying an integer type that can be negative
|
LL | for x in -5isize..5 {
| +++++
```
Collaborator
lcnr
reviewed
Aug 31, 2025
| trait_pred: ty::PolyTraitPredicate<'tcx>, | ||
| err: &mut Diag<'_>, | ||
| ) -> bool { | ||
| if let ObligationCauseCode::BinOp { lhs_hir_id, .. } = obligation.cause.code() |
Contributor
There was a problem hiding this comment.
while you're here, can you change ObligationCauseCode to not just be BinOp 😅 that's horribly confusing.
Looking at the way it's used I think it'd be better to just split it into ObligationCauseCode::UnOp and ObligationCauseCode::BinOp
lcnr
reviewed
Aug 31, 2025
Contributor
Author
|
@bors r=lcnr |
Collaborator
Zalathar
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Sep 1, 2025
Detect negative literal inferred to unsigned integer
```
error[E0277]: the trait bound `usize: Neg` is not satisfied
--> $DIR/negative-literal-infered-to-unsigned.rs:2:14
|
LL | for x in -5..5 {
| ^^ the trait `Neg` is not implemented for `usize`
|
help: consider specifying an integer type that can be negative
|
LL | for x in -5isize..5 {
| +++++
```
Applying this suggestion will always end up in another E0308 error at the point where the unsigned inference comes from, which should help with understanding what the actual problem is.
Fix rust-lang#83413.
bors
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Sep 1, 2025
Rollup of 6 pull requests Successful merges: - #145421 (`dump_mir` cleanups) - #145968 (Add `Bound::copied`) - #146004 (resolve: Refactor `struct ExternPreludeEntry`) - #146042 (Detect negative literal inferred to unsigned integer) - #146046 (Suggest method name with maybe ty mismatch) - #146051 (Change std f32 test to pass under Miri) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
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Sep 1, 2025
Rollup merge of #146042 - estebank:issue-83413, r=lcnr Detect negative literal inferred to unsigned integer ``` error[E0277]: the trait bound `usize: Neg` is not satisfied --> $DIR/negative-literal-infered-to-unsigned.rs:2:14 | LL | for x in -5..5 { | ^^ the trait `Neg` is not implemented for `usize` | help: consider specifying an integer type that can be negative | LL | for x in -5isize..5 { | +++++ ``` Applying this suggestion will always end up in another E0308 error at the point where the unsigned inference comes from, which should help with understanding what the actual problem is. Fix #83413.
Kobzol
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Dec 29, 2025
Rollup of 6 pull requests Successful merges: - rust-lang/rust#145421 (`dump_mir` cleanups) - rust-lang/rust#145968 (Add `Bound::copied`) - rust-lang/rust#146004 (resolve: Refactor `struct ExternPreludeEntry`) - rust-lang/rust#146042 (Detect negative literal inferred to unsigned integer) - rust-lang/rust#146046 (Suggest method name with maybe ty mismatch) - rust-lang/rust#146051 (Change std f32 test to pass under Miri) r? `@ghost` `@rustbot` modify labels: rollup
christian-schilling
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Jan 27, 2026
Rollup of 6 pull requests Successful merges: - rust-lang/rust#145421 (`dump_mir` cleanups) - rust-lang/rust#145968 (Add `Bound::copied`) - rust-lang/rust#146004 (resolve: Refactor `struct ExternPreludeEntry`) - rust-lang/rust#146042 (Detect negative literal inferred to unsigned integer) - rust-lang/rust#146046 (Suggest method name with maybe ty mismatch) - rust-lang/rust#146051 (Change std f32 test to pass under Miri) r? `@ghost` `@rustbot` modify labels: rollup
christian-schilling
pushed a commit
to christian-schilling/rustc_codegen_cranelift
that referenced
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Jan 27, 2026
Rollup of 6 pull requests Successful merges: - rust-lang/rust#145421 (`dump_mir` cleanups) - rust-lang/rust#145968 (Add `Bound::copied`) - rust-lang/rust#146004 (resolve: Refactor `struct ExternPreludeEntry`) - rust-lang/rust#146042 (Detect negative literal inferred to unsigned integer) - rust-lang/rust#146046 (Suggest method name with maybe ty mismatch) - rust-lang/rust#146051 (Change std f32 test to pass under Miri) r? `@ghost` `@rustbot` modify labels: rollup
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Applying this suggestion will always end up in another E0308 error at the point where the unsigned inference comes from, which should help with understanding what the actual problem is.
Fix #83413.