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Fix the dedup error because of spans from suggestion
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,16 @@ | ||
#![allow(dead_code)] | ||
#![allow(unused_variables)] | ||
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fn bug() { | ||
macro_rules! m { | ||
() => { | ||
_ //~ ERROR the placeholder `_` is not allowed within types on item signatures for structs | ||
}; | ||
} | ||
struct S<T = m!()>(m!(), T) | ||
where | ||
T: Trait<m!()>; | ||
} | ||
trait Trait<T> {} | ||
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||
fn main() {} |
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error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs | ||
--> $DIR/macro-span-issue-116502.rs:7:13 | ||
| | ||
LL | _ | ||
| ^ | ||
| | | ||
| not allowed in type signatures | ||
| not allowed in type signatures | ||
| not allowed in type signatures | ||
... | ||
LL | struct S<T = m!()>(m!(), T) | ||
| ---- ---- in this macro invocation | ||
| | | ||
| in this macro invocation | ||
LL | where | ||
LL | T: Trait<m!()>; | ||
| ---- in this macro invocation | ||
| | ||
= note: this error originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info) | ||
help: use type parameters instead | ||
| | ||
LL ~ U | ||
LL | }; | ||
LL | } | ||
LL ~ struct S<U>(m!(), T) | ||
| | ||
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error: aborting due to 1 previous error | ||
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For more information about this error, try `rustc --explain E0121`. |