1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onStep-generators-02.js b/js/src/jit-test/tests/debug/Frame-onStep-generators-02.js
new file mode 100644
index 0000000000..3e1fa6a433
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-onStep-generators-02.js
@@ -0,0 +1,44 @@
+// Stepping into the `.throw()` method of a generator with no relevant catch block.
+//
+// The debugger fires onEnterFrame and then frame.onPop for the generator frame when
+// `gen.throw()` is called.
+
+load(libdir + "asserts.js");
+
+let g = newGlobal({newCompartment: true});
+g.eval(`\
+function* z() {         // line 1
+    yield 1;            // 2
+    yield 2;            // 3
+}                       // 4
+function f() {          // 5
+    let gen = z();      // 6
+    gen.next();         // 7
+    gen.throw("fit");   // 8
+}                       // 9
+`);
+
+let log = "";
+let previousLine = -1;
+let dbg = new Debugger(g);
+dbg.onEnterFrame = frame => {
+    log += frame.callee.name + "{";
+    frame.onStep = () => {
+        let line = frame.script.getOffsetLocation(frame.offset).lineNumber;
+        if (previousLine != line) { // We stepped to a new line.
+            log += line;
+            previousLine = line;
+        }
+    };
+    frame.onPop = completion => {
+        if ("throw" in completion)
+            log += "!";
+        log += "}";
+    }
+};
+
+assertThrowsValue(() => g.f(), "fit");
+// z{1} is the initial generator setup.
+// z{12} is the first .next() call, running to `yield 1` on line 2
+// The final `z{2!}` is for the .throw() call.
+assertEq(log, "f{56z{1}67z{12}78z{2!}!}");