From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:03 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/pattern/usefulness/match-ref-ice.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 tests/ui/pattern/usefulness/match-ref-ice.rs (limited to 'tests/ui/pattern/usefulness/match-ref-ice.rs') diff --git a/tests/ui/pattern/usefulness/match-ref-ice.rs b/tests/ui/pattern/usefulness/match-ref-ice.rs new file mode 100644 index 000000000..dee110f96 --- /dev/null +++ b/tests/ui/pattern/usefulness/match-ref-ice.rs @@ -0,0 +1,16 @@ +#![deny(unreachable_patterns)] + +// The arity of `ref x` is always 1. If the pattern is compared to some non-structural type whose +// arity is always 0, an ICE occurs. +// +// Related issue: #23009 + +fn main() { + let homura = [1, 2, 3]; + + match homura { + [1, ref _madoka, 3] => (), + [1, 2, 3] => (), //~ ERROR unreachable pattern + [_, _, _] => (), + } +} -- cgit v1.2.3