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Add regression test for spurious const error with NLL #89505

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Merged
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Oct 4, 2021
Merged

Add regression test for spurious const error with NLL #89505

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8 changes: 8 additions & 0 deletions src/test/ui/nll/issue-55825-const-fn.rs
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// Regression test for issue #55825
// Tests that we don't emit a spurious warning in NLL mode

#![feature(nll)]

const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() } //~ ERROR const

fn main() { }
12 changes: 12 additions & 0 deletions src/test/ui/nll/issue-55825-const-fn.stderr
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error[E0658]: trait objects in const fn are unstable
--> $DIR/issue-55825-const-fn.rs:6:32
|
LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #57563 <https://github.com/rust-lang/rust/issues/57563> for more information
= help: add `#![feature(const_fn_trait_bound)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.