1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/run-pass-valgrind/coerce-match.rs b/src/test/run-pass-valgrind/coerce-match.rs
new file mode 100644
index 000000000..a4ba5427d
--- /dev/null
+++ b/src/test/run-pass-valgrind/coerce-match.rs
@@ -0,0 +1,19 @@
+// Check that coercions are propagated through match and if expressions.
+
+// pretty-expanded FIXME #23616
+
+#![feature(box_syntax)]
+
+pub fn main() {
+    let _: Box<[isize]> =
+        if true { let b: Box<_> = box [1, 2, 3]; b } else { let b: Box<_> = box [1]; b };
+
+    let _: Box<[isize]> = match true {
+        true => { let b: Box<_> = box [1, 2, 3]; b }
+        false => { let b: Box<_> = box [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;
+}