1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/union/union-unsized.thirunsafeck.stderr b/src/test/ui/union/union-unsized.thirunsafeck.stderr
new file mode 100644
index 000000000..59ab835fb
--- /dev/null
+++ b/src/test/ui/union/union-unsized.thirunsafeck.stderr
@@ -0,0 +1,39 @@
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/union-unsized.rs:5:8
+   |
+LL |     a: str,
+   |        ^^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `str`
+   = note: no field of a union may have a dynamically sized type
+   = help: change the field's type to have a statically known size
+help: borrowed types always have a statically known size
+   |
+LL |     a: &str,
+   |        +
+help: the `Box` type always has a statically known size and allocates its contents in the heap
+   |
+LL |     a: Box<str>,
+   |        ++++   +
+
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/union-unsized.rs:13:8
+   |
+LL |     b: str,
+   |        ^^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `str`
+   = note: no field of a union may have a dynamically sized type
+   = help: change the field's type to have a statically known size
+help: borrowed types always have a statically known size
+   |
+LL |     b: &str,
+   |        +
+help: the `Box` type always has a statically known size and allocates its contents in the heap
+   |
+LL |     b: Box<str>,
+   |        ++++   +
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.