2 files changed, 4 insertions, 28 deletions
diff --git a/src/test/ui/union/union-unsafe.rs b/src/test/ui/union/union-unsafe.rs
index 10f0c467560..9810ed75d59 100644
--- a/src/test/ui/union/union-unsafe.rs
+++ b/src/test/ui/union/union-unsafe.rs
@@ -18,7 +18,7 @@ union U4<T: Copy> {
 
 fn generic_noncopy<T: Default>() {
     let mut u3 = U3 { a: ManuallyDrop::new(T::default()) };
-    u3.a = ManuallyDrop::new(T::default()); //~ ERROR assignment to non-`Copy` union field is unsafe
+    u3.a = ManuallyDrop::new(T::default()); // OK (assignment does not drop)
     *u3.a = T::default(); //~ ERROR access to union field is unsafe
 }
 
@@ -41,7 +41,7 @@ fn main() {
     // let U1 { .. } = u1; // OK
 
     let mut u2 = U2 { a: ManuallyDrop::new(String::from("old")) }; // OK
-    u2.a = ManuallyDrop::new(String::from("new")); //~ ERROR assignment to non-`Copy` union
+    u2.a = ManuallyDrop::new(String::from("new")); // OK (assignment does not drop)
     *u2.a = String::from("new"); //~ ERROR access to union field is unsafe
 
     let mut u3 = U3 { a: ManuallyDrop::new(0) }; // OK
@@ -49,6 +49,6 @@ fn main() {
     *u3.a = 1; //~ ERROR access to union field is unsafe
 
     let mut u3 = U3 { a: ManuallyDrop::new(String::from("old")) }; // OK
-    u3.a = ManuallyDrop::new(String::from("new")); //~ ERROR assignment to non-`Copy` union
+    u3.a = ManuallyDrop::new(String::from("new")); // OK (assignment does not drop)
     *u3.a = String::from("new"); //~ ERROR access to union field is unsafe
 }
diff --git a/src/test/ui/union/union-unsafe.stderr b/src/test/ui/union/union-unsafe.stderr
index b50d9e17506..5b3a58814a9 100644
--- a/src/test/ui/union/union-unsafe.stderr
+++ b/src/test/ui/union/union-unsafe.stderr
@@ -1,11 +1,3 @@
-error[E0133]: assignment to non-`Copy` union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:21:5
-   |
-LL |     u3.a = ManuallyDrop::new(T::default());
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to non-`Copy` union field
-   |
-   = note: the previous content of the field will be dropped, which causes undefined behavior if the field was not properly initialized
-
 error[E0133]: access to union field is unsafe and requires unsafe function or block
   --> $DIR/union-unsafe.rs:22:6
    |
@@ -46,14 +38,6 @@ LL |     if let U1 { a: 12 } = u1 {}
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
-error[E0133]: assignment to non-`Copy` union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:44:5
-   |
-LL |     u2.a = ManuallyDrop::new(String::from("new"));
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to non-`Copy` union field
-   |
-   = note: the previous content of the field will be dropped, which causes undefined behavior if the field was not properly initialized
-
 error[E0133]: access to union field is unsafe and requires unsafe function or block
   --> $DIR/union-unsafe.rs:45:6
    |
@@ -70,14 +54,6 @@ LL |     *u3.a = 1;
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
-error[E0133]: assignment to non-`Copy` union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:52:5
-   |
-LL |     u3.a = ManuallyDrop::new(String::from("new"));
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to non-`Copy` union field
-   |
-   = note: the previous content of the field will be dropped, which causes undefined behavior if the field was not properly initialized
-
 error[E0133]: access to union field is unsafe and requires unsafe function or block
   --> $DIR/union-unsafe.rs:53:6
    |
@@ -86,6 +62,6 @@ LL |     *u3.a = String::from("new");
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
-error: aborting due to 11 previous errors
+error: aborting due to 8 previous errors
 
 For more information about this error, try `rustc --explain E0133`.