1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/coercion/coerce-expect-unsized-ascribed.rs b/src/test/ui/coercion/coerce-expect-unsized-ascribed.rs
new file mode 100644
index 000000000..c139e823c
--- /dev/null
+++ b/src/test/ui/coercion/coerce-expect-unsized-ascribed.rs
@@ -0,0 +1,32 @@
+// A version of coerce-expect-unsized that uses type ascription.
+// Doesn't work so far, but supposed to work eventually
+
+#![feature(box_syntax, type_ascription)]
+
+use std::fmt::Debug;
+
+pub fn main() {
+    let _ = box { [1, 2, 3] }: Box<[i32]>; //~ ERROR mismatched types
+    let _ = box if true { [1, 2, 3] } else { [1, 3, 4] }: Box<[i32]>; //~ ERROR mismatched types
+    let _ = box match true { true => [1, 2, 3], false => [1, 3, 4] }: Box<[i32]>;
+    //~^ ERROR mismatched types
+    let _ = box { |x| (x as u8) }: Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types
+    let _ = box if true { false } else { true }: Box<dyn Debug>; //~ ERROR mismatched types
+    let _ = box match true { true => 'a', false => 'b' }: Box<dyn Debug>; //~ ERROR mismatched types
+
+    let _ = &{ [1, 2, 3] }: &[i32]; //~ ERROR mismatched types
+    let _ = &if true { [1, 2, 3] } else { [1, 3, 4] }: &[i32]; //~ ERROR mismatched types
+    let _ = &match true { true => [1, 2, 3], false => [1, 3, 4] }: &[i32];
+    //~^ ERROR mismatched types
+    let _ = &{ |x| (x as u8) }: &dyn Fn(i32) -> _; //~ ERROR mismatched types
+    let _ = &if true { false } else { true }: &dyn Debug; //~ ERROR mismatched types
+    let _ = &match true { true => 'a', false => 'b' }: &dyn Debug; //~ ERROR mismatched types
+
+    let _ = Box::new([1, 2, 3]): Box<[i32]>; //~ ERROR mismatched types
+    let _ = Box::new(|x| (x as u8)): Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types
+
+    let _ = vec![
+        Box::new(|x| (x as u8)),
+        box |x| (x as i16 as u8),
+    ]: Vec<Box<dyn Fn(i32) -> _>>;
+}