1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/issue-102768.stderr b/src/test/ui/const-generics/generic_const_exprs/issue-102768.stderr
new file mode 100644
index 000000000..9deb9b265
--- /dev/null
+++ b/src/test/ui/const-generics/generic_const_exprs/issue-102768.stderr
@@ -0,0 +1,33 @@
+error[E0107]: this associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
+  --> $DIR/issue-102768.rs:9:30
+   |
+LL |     fn f2<'a>(arg: Box<dyn X<Y<1> = &'a ()>>) {}
+   |                              ^ expected 1 lifetime argument
+   |
+note: associated type defined here, with 1 lifetime parameter: `'a`
+  --> $DIR/issue-102768.rs:5:10
+   |
+LL |     type Y<'a>;
+   |          ^ --
+help: add missing lifetime argument
+   |
+LL |     fn f2<'a>(arg: Box<dyn X<Y<'a, 1> = &'a ()>>) {}
+   |                                +++
+
+error[E0107]: this associated type takes 0 generic arguments but 1 generic argument was supplied
+  --> $DIR/issue-102768.rs:9:30
+   |
+LL |     fn f2<'a>(arg: Box<dyn X<Y<1> = &'a ()>>) {}
+   |                              ^--- help: remove these generics
+   |                              |
+   |                              expected 0 generic arguments
+   |
+note: associated type defined here, with 0 generic parameters
+  --> $DIR/issue-102768.rs:5:10
+   |
+LL |     type Y<'a>;
+   |          ^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0107`.