diff options
Diffstat (limited to 'src/test/ui/nll/issue-47470.rs')
-rw-r--r-- | src/test/ui/nll/issue-47470.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/nll/issue-47470.rs b/src/test/ui/nll/issue-47470.rs new file mode 100644 index 000000000..72ee7f886 --- /dev/null +++ b/src/test/ui/nll/issue-47470.rs @@ -0,0 +1,22 @@ +// Regression test for #47470: cached results of projections were +// causing region relations not to be enforced at all the places where +// they have to be enforced. + +struct Foo<'a>(&'a ()); +trait Bar { + type Assoc; + fn get(self) -> Self::Assoc; +} + +impl<'a> Bar for Foo<'a> { + type Assoc = &'a u32; + fn get(self) -> Self::Assoc { + let local = 42; + &local //~ ERROR cannot return reference to local variable `local` + } +} + +fn main() { + let f = Foo(&()).get(); + println!("{}", f); +} |