1 files changed, 44 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_symbols-02.js b/devtools/server/tests/xpcshell/test_symbols-02.js
new file mode 100644
index 0000000000..12d4ef80c8
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_symbols-02.js
@@ -0,0 +1,44 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Test that we don't run debuggee code when getting symbol names.
+ */
+
+const URL = "foo.js";
+
+add_task(
+  threadFrontTest(async ({ threadFront, debuggee }) => {
+    await testSymbols(threadFront, debuggee);
+  })
+);
+
+async function testSymbols(threadFront, debuggee) {
+  const evalCode = () => {
+    /* eslint-disable mozilla/var-only-at-top-level, no-extend-native, no-unused-vars */
+    // prettier-ignore
+    Cu.evalInSandbox(
+      "(" + function () {
+        Symbol.prototype.toString = () => {
+          throw new Error("lololol");
+        };
+        var sym = Symbol("le troll");
+        debugger;
+      } + "())",
+      debuggee,
+      "1.8",
+      URL,
+      1
+    );
+    /* eslint-enable mozilla/var-only-at-top-level, no-extend-native, no-unused-vars */
+  };
+
+  const packet = await executeOnNextTickAndWaitForPause(evalCode, threadFront);
+  const environment = await packet.frame.getEnvironment();
+  const { sym } = environment.bindings.variables;
+
+  equal(sym.value.type, "symbol");
+  equal(sym.value.name, "le troll");
+}