1 files changed, 53 insertions, 0 deletions
diff --git a/src/test/ui/unsized/unsized-struct.stderr b/src/test/ui/unsized/unsized-struct.stderr
new file mode 100644
index 000000000..c9510e92f
--- /dev/null
+++ b/src/test/ui/unsized/unsized-struct.stderr
@@ -0,0 +1,53 @@
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+  --> $DIR/unsized-struct.rs:6:36
+   |
+LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
+   |         -                          ^^^^^^ doesn't have a size known at compile-time
+   |         |
+   |         this type parameter needs to be `std::marker::Sized`
+   |
+note: required by a bound in `Foo`
+  --> $DIR/unsized-struct.rs:4:12
+   |
+LL | struct Foo<T> { data: T }
+   |            ^ required by this bound in `Foo`
+help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
+  --> $DIR/unsized-struct.rs:4:12
+   |
+LL | struct Foo<T> { data: T }
+   |            ^          - ...if indirection were used here: `Box<T>`
+   |            |
+   |            this could be changed to `T: ?Sized`...
+help: consider removing the `?Sized` bound to make the type parameter `Sized`
+   |
+LL - fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
+LL + fn foo2<T>() { not_sized::<Foo<T>>() }
+   |
+
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+  --> $DIR/unsized-struct.rs:13:24
+   |
+LL | fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
+   |         -              ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+   |         |
+   |         this type parameter needs to be `std::marker::Sized`
+   |
+note: required because it appears within the type `Bar<T>`
+  --> $DIR/unsized-struct.rs:11:8
+   |
+LL | struct Bar<T: ?Sized> { data: T }
+   |        ^^^
+note: required by a bound in `is_sized`
+  --> $DIR/unsized-struct.rs:1:13
+   |
+LL | fn is_sized<T:Sized>() { }
+   |             ^ required by this bound in `is_sized`
+help: consider removing the `?Sized` bound to make the type parameter `Sized`
+   |
+LL - fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
+LL + fn bar2<T>() { is_sized::<Bar<T>>() }
+   |
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.