1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs
new file mode 100644
index 000000000..4f424b8c6
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs
@@ -0,0 +1,15 @@
+#![feature(type_alias_impl_trait)]
+#![allow(dead_code)]
+
+type OneLifetime<'a, 'b> = impl std::fmt::Debug;
+
+fn foo<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> {
+    a
+}
+
+fn bar<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> {
+    b
+    //~^ ERROR: concrete type differs from previous defining opaque type use
+}
+
+fn main() {}