1 files changed, 24 insertions, 0 deletions
diff --git a/toolkit/modules/tests/xpcshell/test_Log_double_ext.js b/toolkit/modules/tests/xpcshell/test_Log_double_ext.js
new file mode 100644
index 0000000000..960cf1be06
--- /dev/null
+++ b/toolkit/modules/tests/xpcshell/test_Log_double_ext.js
@@ -0,0 +1,24 @@
+const { Log } = ChromeUtils.importESModule(
+  "resource://gre/modules/Log.sys.mjs"
+);
+
+function run_test() {
+  // Verify error with double extensions are handled correctly.
+
+  const nsIExceptionTrace = Log.stackTrace({
+    location: {
+      filename: "chrome://foo/bar/file.sys.mjs",
+      lineNumber: 10,
+      name: "func",
+      caller: null,
+    },
+  });
+
+  Assert.equal(nsIExceptionTrace, "Stack trace: func()@file.sys.mjs:10");
+
+  const JSExceptionTrace = Log.stackTrace({
+    stack: "func2@chrome://foo/bar/file.sys.mjs:10:2",
+  });
+
+  Assert.equal(JSExceptionTrace, "JS Stack trace: func2@file.sys.mjs:10:2");
+}