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Diffstat (limited to 'tests/ui/traits/next-solver/temporary-ambiguity.rs')
-rw-r--r-- | tests/ui/traits/next-solver/temporary-ambiguity.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/temporary-ambiguity.rs b/tests/ui/traits/next-solver/temporary-ambiguity.rs new file mode 100644 index 000000000..6102de7e4 --- /dev/null +++ b/tests/ui/traits/next-solver/temporary-ambiguity.rs @@ -0,0 +1,22 @@ +// compile-flags: -Znext-solver +// check-pass + +// Checks that we don't explode when we assemble >1 candidate for a goal. + +struct Wrapper<T>(T); + +trait Foo {} + +impl Foo for Wrapper<i32> {} + +impl Foo for Wrapper<()> {} + +fn needs_foo(_: impl Foo) {} + +fn main() { + let mut x = Default::default(); + let w = Wrapper(x); + needs_foo(w); + x = 1; + let _ = x; +} |