1 files changed, 33 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-12511.stderr b/tests/ui/issues/issue-12511.stderr
new file mode 100644
index 000000000..789a1141c
--- /dev/null
+++ b/tests/ui/issues/issue-12511.stderr
@@ -0,0 +1,33 @@
+error[E0391]: cycle detected when computing the super predicates of `T1`
+  --> $DIR/issue-12511.rs:1:1
+   |
+LL | trait T1 : T2 {
+   | ^^^^^^^^^^^^^
+   |
+note: ...which requires computing the super traits of `T1`...
+  --> $DIR/issue-12511.rs:1:12
+   |
+LL | trait T1 : T2 {
+   |            ^^
+note: ...which requires computing the super predicates of `T2`...
+  --> $DIR/issue-12511.rs:5:1
+   |
+LL | trait T2 : T1 {
+   | ^^^^^^^^^^^^^
+note: ...which requires computing the super traits of `T2`...
+  --> $DIR/issue-12511.rs:5:12
+   |
+LL | trait T2 : T1 {
+   |            ^^
+   = note: ...which again requires computing the super predicates of `T1`, completing the cycle
+note: cycle used when collecting item types in top-level module
+  --> $DIR/issue-12511.rs:1:1
+   |
+LL | / trait T1 : T2 {
+LL | |
+LL | | }
+   | |_^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0391`.