diff options
Diffstat (limited to 'tests/ui/pattern/usefulness/match-ref-ice.rs')
-rw-r--r-- | tests/ui/pattern/usefulness/match-ref-ice.rs | 16 |
1 files changed, 16 insertions, 0 deletions
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 + [_, _, _] => (), + } +} |