1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/coherence/issue-85026.rs b/src/test/ui/coherence/issue-85026.rs
new file mode 100644
index 000000000..8b116545a
--- /dev/null
+++ b/src/test/ui/coherence/issue-85026.rs
@@ -0,0 +1,10 @@
+#![feature(auto_traits)]
+auto trait AutoTrait {}
+
+// You cannot impl your own `dyn AutoTrait`.
+impl dyn AutoTrait {} //~ERROR E0785
+
+// You cannot impl someone else's `dyn AutoTrait`
+impl dyn Unpin {} //~ERROR E0785
+
+fn main() {}