1 files changed, 51 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/union-assignop.mirunsafeck.stderr b/src/test/ui/unsafe/union-assignop.mirunsafeck.stderr
new file mode 100644
index 000000000..0ecd5203d
--- /dev/null
+++ b/src/test/ui/unsafe/union-assignop.mirunsafeck.stderr
@@ -0,0 +1,51 @@
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:19:5
+   |
+LL |     foo.a += 5;
+   |     ^^^^^^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:20:6
+   |
+LL |     *foo.b += NonCopy;
+   |      ^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:21:6
+   |
+LL |     *foo.b = NonCopy;
+   |      ^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:23:5
+   |
+LL |     foo.a;
+   |     ^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:25:5
+   |
+LL |     foo.b;
+   |     ^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-assignop.rs:27:13
+   |
+LL |     foo.b = foo.b;
+   |             ^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0133`.