1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/mut/mutable-class-fields.stderr b/tests/ui/mut/mutable-class-fields.stderr
new file mode 100644
index 00000000000..1d731be8a85
--- /dev/null
+++ b/tests/ui/mut/mutable-class-fields.stderr
@@ -0,0 +1,14 @@
+error[E0594]: cannot assign to `nyan.how_hungry`, as `nyan` is not declared as mutable
+  --> $DIR/mutable-class-fields.rs:15:3
+   |
+LL |   nyan.how_hungry = 0;
+   |   ^^^^^^^^^^^^^^^^^^^ cannot assign
+   |
+help: consider changing this to be mutable
+   |
+LL |   let mut nyan : Cat = cat(52, 99);
+   |       +++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0594`.