diff options
Diffstat (limited to 'src/test/ui/span/issue28498-reject-passed-to-fn.rs')
-rw-r--r-- | src/test/ui/span/issue28498-reject-passed-to-fn.rs | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/src/test/ui/span/issue28498-reject-passed-to-fn.rs b/src/test/ui/span/issue28498-reject-passed-to-fn.rs deleted file mode 100644 index dcd2e9ad4..000000000 --- a/src/test/ui/span/issue28498-reject-passed-to-fn.rs +++ /dev/null @@ -1,38 +0,0 @@ -// Demonstrate that a type param in negative position causes dropck to reject code -// that might indirectly access previously dropped value. -// -// Compare with run-pass/issue28498-ugeh-with-passed-to-fn.rs - -#[derive(Debug)] -struct ScribbleOnDrop(String); - -impl Drop for ScribbleOnDrop { - fn drop(&mut self) { - self.0 = format!("DROPPED"); - } -} - -struct Foo<T>(u32, T, Box<for <'r> fn(&'r T) -> String>); - -impl<T> Drop for Foo<T> { - fn drop(&mut self) { - // Use of `may_dangle` is unsound, because we pass `T` to the callback in `self.2` - // below, and thus potentially read from borrowed data. - println!("Dropping Foo({}, {})", self.0, (self.2)(&self.1)); - } -} - -fn callback(s: & &ScribbleOnDrop) -> String { format!("{:?}", s) } - -fn main() { - let (last_dropped, foo0); - let (foo1, first_dropped); - - last_dropped = ScribbleOnDrop(format!("last")); - first_dropped = ScribbleOnDrop(format!("first")); - foo0 = Foo(0, &last_dropped, Box::new(callback)); // OK - foo1 = Foo(1, &first_dropped, Box::new(callback)); - //~^ ERROR `first_dropped` does not live long enough - - println!("foo0.1: {:?} foo1.1: {:?}", foo0.1, foo1.1); -} |