1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/class/bug1473272-default-constructors.js b/js/src/jit-test/tests/class/bug1473272-default-constructors.js
new file mode 100644
index 0000000000..e9bd5c1889
--- /dev/null
+++ b/js/src/jit-test/tests/class/bug1473272-default-constructors.js
@@ -0,0 +1,24 @@
+// Test the source location info in a derived-class default constructor.
+
+function W() { test(); }
+class Z extends W {}  // line 4
+class Y extends Z {}  // line 5
+
+class X extends Y {}  // line 7
+
+function test() {
+    for (let frame of new Error().stack.split('\n')) {
+        function lineNumber(frame) {
+            return +frame.match(/(\d+):\d+$/)[1];
+        }
+
+        if (frame.startsWith("Z@"))
+            assertEq(lineNumber(frame), 4);
+        if (frame.startsWith("Y@"))
+            assertEq(lineNumber(frame), 5);
+        if (frame.startsWith("X@"))
+            assertEq(lineNumber(frame), 7);
+    }
+}
+
+new X;