diff options
Diffstat (limited to 'src/test/ui/regions/regions-lifetime-nonfree-late-bound.rs')
-rw-r--r-- | src/test/ui/regions/regions-lifetime-nonfree-late-bound.rs | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/src/test/ui/regions/regions-lifetime-nonfree-late-bound.rs b/src/test/ui/regions/regions-lifetime-nonfree-late-bound.rs deleted file mode 100644 index 3852a14d9..000000000 --- a/src/test/ui/regions/regions-lifetime-nonfree-late-bound.rs +++ /dev/null @@ -1,33 +0,0 @@ -// run-pass -// This is a regression test for the ICE from issue #10846. -// -// The original issue causing the ICE: the LUB-computations during -// type inference were encountering late-bound lifetimes, and -// asserting that such lifetimes should have already been substituted -// with a concrete lifetime. -// -// However, those encounters were occurring within the lexical scope -// of the binding for the late-bound lifetime; that is, the late-bound -// lifetimes were perfectly valid. The core problem was that the type -// folding code was over-zealously passing back all lifetimes when -// doing region-folding, when really all clients of the region-folding -// case only want to see FREE lifetime variables, not bound ones. - -// pretty-expanded FIXME #23616 - -pub fn main() { - fn explicit() { - fn test<F>(_x: Option<Box<F>>) where F: FnMut(Box<dyn for<'a> FnMut(&'a isize)>) {} - test(Some(Box::new(|_f: Box<dyn for<'a> FnMut(&'a isize)>| {}))); - } - - // The code below is shorthand for the code above (and more likely - // to represent what one encounters in practice). - fn implicit() { - fn test<F>(_x: Option<Box<F>>) where F: FnMut(Box<dyn FnMut(& isize)>) {} - test(Some(Box::new(|_f: Box<dyn FnMut(& isize)>| {}))); - } - - explicit(); - implicit(); -} |