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author | Yuki Okushi <huyuumi.dev@gmail.com> | 2020-10-23 16:10:19 +0900 |
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committer | Yuki Okushi <huyuumi.dev@gmail.com> | 2020-10-23 16:10:19 +0900 |
commit | 5b32c84952a5d734839a486d77f07dfe995bcae7 (patch) | |
tree | 102db344fc13ee82a3dc12dd0fa4cacb9a7db149 | |
parent | a9cd294cf2775441e713c7ee2918b728733b99f5 (diff) | |
download | rust-5b32c84952a5d734839a486d77f07dfe995bcae7.tar.gz |
Add a regression test for issue-72616
-rw-r--r-- | src/test/ui/inference/issue-72616.rs | 29 | ||||
-rw-r--r-- | src/test/ui/inference/issue-72616.stderr | 13 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/inference/issue-72616.rs b/src/test/ui/inference/issue-72616.rs new file mode 100644 index 00000000000..5e5a3babfe0 --- /dev/null +++ b/src/test/ui/inference/issue-72616.rs @@ -0,0 +1,29 @@ +// Regression test for #72616, it used to emit incorrect diagnostics, like: +// error[E0283]: type annotations needed for `String` +// --> src/main.rs:8:30 +// | +// 5 | let _: String = "".to_owned().try_into().unwrap(); +// | - consider giving this pattern a type +// ... +// 8 | if String::from("a") == "a".try_into().unwrap() {} +// | ^^ cannot infer type for struct `String` +// | +// = note: cannot satisfy `String: PartialEq<_>` + +use std::convert::TryInto; + +pub fn main() { + { + let _: String = "".to_owned().try_into().unwrap(); + } + { + if String::from("a") == "a".try_into().unwrap() {} + //~^ ERROR: type annotations needed + } + { + let _: String = match "_".try_into() { + Ok(a) => a, + Err(_) => "".into(), + }; + } +} diff --git a/src/test/ui/inference/issue-72616.stderr b/src/test/ui/inference/issue-72616.stderr new file mode 100644 index 00000000000..d811988c9c1 --- /dev/null +++ b/src/test/ui/inference/issue-72616.stderr @@ -0,0 +1,13 @@ +error[E0283]: type annotations needed + --> $DIR/issue-72616.rs:20:30 + | +LL | if String::from("a") == "a".try_into().unwrap() {} + | ^^ -------------- this method call resolves to `std::result::Result<T, <Self as TryInto<T>>::Error>` + | | + | cannot infer type + | + = note: cannot satisfy `String: PartialEq<_>` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0283`. |