diff options
Diffstat (limited to 'src/test/ui/traits/inductive-overflow/lifetime.rs')
-rw-r--r-- | src/test/ui/traits/inductive-overflow/lifetime.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/traits/inductive-overflow/lifetime.rs b/src/test/ui/traits/inductive-overflow/lifetime.rs new file mode 100644 index 000000000..c36c17d3d --- /dev/null +++ b/src/test/ui/traits/inductive-overflow/lifetime.rs @@ -0,0 +1,32 @@ +// Test that we don't hit the recursion limit for short cycles involving lifetimes. + +// Shouldn't hit this, we should realize that we're in a cycle sooner. +#![recursion_limit="20"] + +trait NotAuto {} +trait Y { + type P; +} + +impl<'a> Y for C<'a> { + type P = Box<X<C<'a>>>; +} + +struct C<'a>(&'a ()); +struct X<T: Y>(T::P); + +impl<T: NotAuto> NotAuto for Box<T> {} //~ NOTE: required +impl<T: Y> NotAuto for X<T> where T::P: NotAuto {} +impl<'a> NotAuto for C<'a> {} + +fn is_send<S: NotAuto>() {} +//~^ NOTE: required +//~| NOTE: required + +fn main() { + // Should only be a few notes. + is_send::<X<C<'static>>>(); + //~^ ERROR overflow evaluating + //~| 3 redundant requirements hidden + //~| required because of +} |