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Add regression test for negative literal in a range of unsigned type #151963

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rust-bors merged 1 commit into from
Feb 2, 2026
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Add regression test for negative literal in a range of unsigned type #151963

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21 changes: 21 additions & 0 deletions tests/ui/range/range-negative-literal-unsigned-type.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
// Regression tests for: https://github.com/rust-lang/rust/issues/136514

#![allow(unreachable_patterns)]
fn main() {
match 0u8 {
-1..=2 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
-0..=0 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
-256..=2 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
-255..=2 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
0..=-1 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
-2..=-1 => {}
//~^ ERROR the trait bound `u8: Neg` is not satisfied
//~| ERROR the trait bound `u8: Neg` is not satisfied
_ => {}
}
}
122 changes: 122 additions & 0 deletions tests/ui/range/range-negative-literal-unsigned-type.stderr
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error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:6:9
|
LL | -1..=2 => {}
| ^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:8:9
|
LL | -0..=0 => {}
| ^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:10:9
|
LL | -256..=2 => {}
| ^^^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:12:9
|
LL | -255..=2 => {}
| ^^^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:14:13
|
LL | 0..=-1 => {}
| ^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:16:9
|
LL | -2..=-1 => {}
| ^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error[E0277]: the trait bound `u8: Neg` is not satisfied
--> $DIR/range-negative-literal-unsigned-type.rs:16:14
|
LL | -2..=-1 => {}
| ^^ the trait `Neg` is not implemented for `u8`
|
= help: the following other types implement trait `Neg`:
&f128
&f16
&f32
&f64
&i128
&i16
&i32
&i64
and 12 others

error: aborting due to 7 previous errors

For more information about this error, try `rustc --explain E0277`.
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