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issue-22034.rs
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#![
feature
(
rustc_private
)]
extern
crate libc
;
fn
main
()
{
let
ptr
:
*
mut
()
=
core
::
ptr
::
null_mut
();
let
_
:
&
mut
dyn
Fn
()
=
unsafe
{
&
mut
*(
ptr
as
*
mut
dyn
Fn
())
//~^ ERROR expected a `Fn()` closure, found `()`
};
}