1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/onEnterFrame-generator-06.js b/js/src/jit-test/tests/debug/onEnterFrame-generator-06.js
new file mode 100644
index 0000000000..a19fdf7787
--- /dev/null
+++ b/js/src/jit-test/tests/debug/onEnterFrame-generator-06.js
@@ -0,0 +1,24 @@
+// Bug 1561935. Test interaction between debug traps for step mode and
+// DebugAfterYield.
+
+let g = newGlobal({newCompartment: true});
+g.eval('function* f() { yield 1; yield 2; }');
+let dbg = Debugger(g);
+let genObj = null;
+let hits = 0;
+dbg.onEnterFrame = frame => {
+    // The first time onEnterFrame fires, there is no generator object, so
+    // there's nothing to test. The generator object doesn't exist until
+    // JSOP_GENERATOR is reached, right before the initial yield.
+    if (genObj === null) {
+        // Trigger step mode.
+        frame.onStep = function() {};
+    } else {
+        dbg.removeDebuggee(g);
+        dbg.addDebuggee(g);
+        hits++;
+    }
+};
+genObj = g.f();
+for (let x of genObj) {}
+assertEq(hits, 3);