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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/diverging-fallback-option.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/diverging-fallback-option.rs')
-rw-r--r--tests/ui/diverging-fallback-option.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/diverging-fallback-option.rs b/tests/ui/diverging-fallback-option.rs
new file mode 100644
index 000000000..46bdfc96d
--- /dev/null
+++ b/tests/ui/diverging-fallback-option.rs
@@ -0,0 +1,14 @@
+// run-pass
+
+#![allow(warnings)]
+
+// Here the type of `c` is `Option<?T>`, where `?T` is unconstrained.
+// Because there is data-flow from the `{ return; }` block, which
+// diverges and hence has type `!`, into `c`, we will default `?T` to
+// `!`, and hence this code compiles rather than failing and requiring
+// a type annotation.
+
+fn main() {
+ let c = Some({ return; });
+ c.unwrap();
+}