2 files changed, 22 insertions, 0 deletions
diff --git a/tests/run-make/issue-20626/Makefile b/tests/run-make/issue-20626/Makefile
new file mode 100644
index 000000000..63eee910a
--- /dev/null
+++ b/tests/run-make/issue-20626/Makefile
@@ -0,0 +1,9 @@
+# ignore-cross-compile
+include ../tools.mk
+
+# Test output to be four
+# The original error only occurred when printing, not when comparing using assert!
+
+all:
+	$(RUSTC) foo.rs -O
+	[ `$(call RUN,foo)` = "4" ]
diff --git a/tests/run-make/issue-20626/foo.rs b/tests/run-make/issue-20626/foo.rs
new file mode 100644
index 000000000..a474e234e
--- /dev/null
+++ b/tests/run-make/issue-20626/foo.rs
@@ -0,0 +1,13 @@
+fn identity(a: &u32) -> &u32 { a }
+
+fn print_foo(f: &fn(&u32) -> &u32, x: &u32) {
+    print!("{}", (*f)(x));
+}
+
+fn main() {
+    let x = &4;
+    let f: fn(&u32) -> &u32 = identity;
+
+    // Didn't print 4 on optimized builds
+    print_foo(&f, x);
+}