1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/breakpoint-11.js b/js/src/jit-test/tests/debug/breakpoint-11.js
new file mode 100644
index 0000000000..4dce2e95b4
--- /dev/null
+++ b/js/src/jit-test/tests/debug/breakpoint-11.js
@@ -0,0 +1,38 @@
+// Setting a breakpoint in a generator function works, and we can
+// traverse the stack and evaluate expressions in the context of older
+// generator frames.
+
+var g = newGlobal({newCompartment: true});
+var dbg = Debugger(g);
+dbg.onDebuggerStatement = function (frame) {
+    function hit(frame) {
+        frame.older.eval("q += 16");
+    }
+
+    var s = frame.script;
+    var offs = s.getLineOffsets(g.line0 + 9);
+    for (var i = 0; i < offs.length; i++)
+        s.setBreakpoint(offs[i], {hit: hit});
+};
+
+g.eval("line0 = Error().lineNumber;\n" +
+       "function* g(x) {\n" +   // + 1
+       "    var q = 10;\n" +    // + 2
+       "    yield* x;\n" +      // + 3
+       "    return q;\n" +      // + 4
+       "}\n" +                  // + 5
+       "function* range(n) {\n" + // + 6
+       "    debugger;\n" +      // + 7
+       "    for (var i = 0; i < n; i++)\n" + // + 8
+       "        yield i;\n" +   // + 9  <-- breakpoint
+       "    return;\n" + // so that line 9 only has the yield
+       "}");
+
+g.eval("var iter = g(range(2))");
+g.eval("var first = iter.next().value");
+g.eval("var second = iter.next().value");
+g.eval("var third = iter.next().value");
+
+assertEq(g.first, 0);
+assertEq(g.second, 1);
+assertEq(g.third, 42);