1 files changed, 10 insertions, 2 deletions
diff --git a/test/run_tests.cpp b/test/run_tests.cpp
index e7729e5a42..8fd17c4d1a 100644
--- a/test/run_tests.cpp
+++ b/test/run_tests.cpp
@@ -569,6 +569,11 @@ export fn main(argc : isize, argv : &&u8, env : &&u8) -> i32 {
     foo.a += 1;
     foo.b = foo.a == 1;
     test_foo(foo);
+    test_mutation(&foo);
+    if foo.c != 100 {
+        print_str("BAD\n");
+    }
+    print_str("OK\n");
     return 0;
 }
 struct Foo {
@@ -577,10 +582,13 @@ struct Foo {
     c : f32,
 }
 fn test_foo(foo : Foo) {
-    if foo.b {
-        print_str("OK\n");
+    if !foo.b {
+        print_str("BAD\n");
     }
 }
+fn test_mutation(foo : &Foo) {
+    foo.c = 100;
+}
     )SOURCE", "OK\n");
 
     add_simple_case("global variables", R"SOURCE(