1 files changed, 60 insertions, 0 deletions
diff --git a/tests/ui/feature-gates/feature-gate-unsized_fn_params.stderr b/tests/ui/feature-gates/feature-gate-unsized_fn_params.stderr
new file mode 100644
index 000000000..92c713926
--- /dev/null
+++ b/tests/ui/feature-gates/feature-gate-unsized_fn_params.stderr
@@ -0,0 +1,60 @@
+error[E0277]: the size for values of type `(dyn Foo + 'static)` cannot be known at compilation time
+  --> $DIR/feature-gate-unsized_fn_params.rs:17:8
+   |
+LL | fn foo(x: dyn Foo) {
+   |        ^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `(dyn Foo + 'static)`
+   = help: unsized fn params are gated as an unstable feature
+help: you can use `impl Trait` as the argument type
+   |
+LL | fn foo(x: impl Foo) {
+   |           ~~~~
+help: function arguments must have a statically known size, borrowed types always have a known size
+   |
+LL | fn foo(x: &dyn Foo) {
+   |           +
+
+error[E0277]: the size for values of type `(dyn Foo + 'static)` cannot be known at compilation time
+  --> $DIR/feature-gate-unsized_fn_params.rs:21:8
+   |
+LL | fn bar(x: Foo) {
+   |        ^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `(dyn Foo + 'static)`
+   = help: unsized fn params are gated as an unstable feature
+help: you can use `impl Trait` as the argument type
+   |
+LL | fn bar(x: impl Foo) {
+   |           ++++
+help: function arguments must have a statically known size, borrowed types always have a known size
+   |
+LL | fn bar(x: &Foo) {
+   |           +
+
+error[E0277]: the size for values of type `[()]` cannot be known at compilation time
+  --> $DIR/feature-gate-unsized_fn_params.rs:25:8
+   |
+LL | fn qux(_: [()]) {}
+   |        ^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `[()]`
+   = help: unsized fn params are gated as an unstable feature
+help: function arguments must have a statically known size, borrowed types always have a known size
+   |
+LL | fn qux(_: &[()]) {}
+   |           +
+
+error[E0277]: the size for values of type `(dyn Foo + 'static)` cannot be known at compilation time
+  --> $DIR/feature-gate-unsized_fn_params.rs:29:9
+   |
+LL |     foo(*x);
+   |         ^^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `(dyn Foo + 'static)`
+   = note: all function arguments must have a statically known size
+   = help: unsized fn params are gated as an unstable feature
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0277`.