1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/function-gname.js b/js/src/jit-test/tests/basic/function-gname.js
new file mode 100644
index 0000000000..061bb08761
--- /dev/null
+++ b/js/src/jit-test/tests/basic/function-gname.js
@@ -0,0 +1,34 @@
+function bytecode(f) {
+    if (typeof disassemble !== "function")
+        return "unavailable";
+    var d = disassemble(f);
+    return d.slice(d.indexOf("main:"), d.indexOf("\n\n"));
+}
+
+function hasGname(f, v) {
+    // Do a try-catch that prints the full stack, so we can tell
+    // _which_ part of this test failed.
+    try {
+        var b = bytecode(f);
+        if (b != "unavailable") {
+            assertEq(b.includes(`GetGName "${v}"`), true);
+            assertEq(b.includes(`GetName "${v}"`), false);
+        }
+    } catch (e) {
+        print(e.stack);
+        throw e;
+    }
+}
+
+var x = "outer";
+
+var f1 = new Function("assertEq(x, 'outer')");
+f1();
+hasGname(f1, 'x');
+
+{
+    let x = "inner";
+    var f3 = new Function("assertEq(x, 'outer')");
+    f3();
+    hasGname(f3, 'x');
+}