diff options
Diffstat (limited to 'src/test/ui/inference/cannot-infer-partial-try-return.rs')
-rw-r--r-- | src/test/ui/inference/cannot-infer-partial-try-return.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/inference/cannot-infer-partial-try-return.rs b/src/test/ui/inference/cannot-infer-partial-try-return.rs new file mode 100644 index 000000000..b555697dc --- /dev/null +++ b/src/test/ui/inference/cannot-infer-partial-try-return.rs @@ -0,0 +1,23 @@ +struct QualifiedError<E>(E); + +impl<E, T> From<E> for QualifiedError<T> +where + E: std::error::Error, + T: From<E>, +{ + fn from(e: E) -> QualifiedError<T> { + QualifiedError(e.into()) + } +} + +fn infallible() -> Result<(), std::convert::Infallible> { + Ok(()) +} + +fn main() { + let x = || -> Result<_, QualifiedError<_>> { + infallible()?; + Ok(()) + //~^ ERROR type annotations needed + }; +} |