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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
commit64d98f8ee037282c35007b64c2649055c56af1db (patch)
tree5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/inference/cannot-infer-closure-circular.rs
parentAdding debian version 1.67.1+dfsg1-1. (diff)
downloadrustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz
rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/inference/cannot-infer-closure-circular.rs')
-rw-r--r--tests/ui/inference/cannot-infer-closure-circular.rs13
1 files changed, 13 insertions, 0 deletions
diff --git a/tests/ui/inference/cannot-infer-closure-circular.rs b/tests/ui/inference/cannot-infer-closure-circular.rs
new file mode 100644
index 000000000..affb48149
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+++ b/tests/ui/inference/cannot-infer-closure-circular.rs
@@ -0,0 +1,13 @@
+fn main() {
+ // Below we call the closure with its own return as the argument, unifying
+ // its inferred input and return types. We want to make sure that the generated
+ // error handles this gracefully, and in particular doesn't generate an extra
+ // note about the `?` operator in the closure body, which isn't relevant to
+ // the inference.
+ let x = |r| { //~ ERROR type annotations needed for `Result<(), E>`
+ let v = r?;
+ Ok(v)
+ };
+
+ let _ = x(x(Ok(())));
+}