1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/suggestions/suggest-box.stderr b/tests/ui/suggestions/suggest-box.stderr
new file mode 100644
index 000000000..2bdaa4e97
--- /dev/null
+++ b/tests/ui/suggestions/suggest-box.stderr
@@ -0,0 +1,26 @@
+error[E0308]: mismatched types
+  --> $DIR/suggest-box.rs:4:47
+   |
+LL |       let _x: Box<dyn Fn() -> Result<(), ()>> = || {
+   |  _____________-------------------------------___^
+   | |             |
+   | |             expected due to this
+LL | |         Err(())?;
+LL | |         Ok(())
+LL | |     };
+   | |_____^ expected struct `Box`, found closure
+   |
+   = note: expected struct `Box<dyn Fn() -> Result<(), ()>>`
+             found closure `[closure@$DIR/suggest-box.rs:4:47: 4:49]`
+   = note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
+help: store this in the heap by calling `Box::new`
+   |
+LL ~     let _x: Box<dyn Fn() -> Result<(), ()>> = Box::new(|| {
+LL |         Err(())?;
+LL |         Ok(())
+LL ~     });
+   |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.