1 files changed, 22 insertions, 0 deletions
diff --git a/tests/run-pass-valgrind/coerce-match.rs b/tests/run-pass-valgrind/coerce-match.rs
new file mode 100644
index 000000000..5b78f1ec7
--- /dev/null
+++ b/tests/run-pass-valgrind/coerce-match.rs
@@ -0,0 +1,22 @@
+// Check that coercions are propagated through match and if expressions.
+
+// pretty-expanded FIXME #23616
+
+pub fn main() {
+    let _: Box<[isize]> = if true {
+        let b: Box<_> = Box::new([1, 2, 3]);
+        b
+    } else {
+        let b: Box<_> = Box::new([1]);
+        b
+    };
+
+    let _: Box<[isize]> = match true {
+        true => { let b: Box<_> = Box::new([1, 2, 3]); b }
+        false => { let b: Box<_> = Box::new([1]); b }
+    };
+
+    // Check we don't get over-keen at propagating coercions in the case of casts.
+    let x = if true { 42 } else { 42u8 } as u16;
+    let x = match true { true => 42, false => 42u8 } as u16;
+}