On return type `impl Trait` for block with no expr point at last semi

2 files changed, 20 insertions, 0 deletions

diff --git a/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.rs b/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.rs
new file mode 100644
index 00000000000..e72a2d8ccc6
--- /dev/null
+++ b/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.rs
@@ -0,0 +1,7 @@
+trait Bar {}
+impl Bar for u8 {}
+fn foo() -> impl Bar {
+    5; //~^ ERROR the trait bound `(): Bar` is not satisfied
+}
+
+fn main() {}
diff --git a/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.stderr b/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.stderr
new file mode 100644
index 00000000000..f26fb141ccf
--- /dev/null
+++ b/src/test/ui/suggestions/impl-trait-return-trailing-semicolon.stderr
@@ -0,0 +1,13 @@
+error[E0277]: the trait bound `(): Bar` is not satisfied
+  --> $DIR/impl-trait-return-trailing-semicolon.rs:3:13
+   |
+LL | fn foo() -> impl Bar {
+   |             ^^^^^^^^ the trait `Bar` is not implemented for `()`
+LL |     5; //~^ ERROR the trait bound `(): Bar` is not satisfied
+   |      - consider removing this semicolon
+   |
+   = note: the return type of a function must have a statically known size
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.