1 files changed, 107 insertions, 0 deletions
diff --git a/deps/v8/test/inspector/regress/regress-crbug-1270780.js b/deps/v8/test/inspector/regress/regress-crbug-1270780.js
new file mode 100644
index 0000000000..0be18f4230
--- /dev/null
+++ b/deps/v8/test/inspector/regress/regress-crbug-1270780.js
@@ -0,0 +1,107 @@
+// Copyright 2022 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+let {session, contextGroup, Protocol} = InspectorTest.start('Regression test for crbug.com/1270780.');
+
+contextGroup.addScript(`
+function* gen() {
+  yield 1;
+  throw new Error();
+}
+
+function callGen() {
+  try {
+    for (const x of gen()) {}
+  } catch {}
+}
+
+const throwNextIter = () => ({
+  values: [1, 2],
+  next() {
+    // Throw an exception once 'values' is empty.
+    if (this.values.length === 0) {
+      throw new Error();
+    }
+    return {value: this.values.shift(), done: false};
+  },
+  [Symbol.iterator]() { return this; }
+});
+
+const throwReturnIter = () => ({
+  values: [1, 2],
+  next() {
+    if (this.values.length === 0) { return {done: true}};
+    return {value: this.values.shift(), done: false};
+  },
+  return() {
+    throw new Error();
+  },
+  [Symbol.iterator]() { return this; }
+});
+
+function iterateIterator(iter) {
+  try {
+    for (const x of iter) {}
+  } catch {}
+}
+
+function breakingLoopBody(iter) {
+  try {
+    for (const x of iter) {
+      break;  // Triger '.return'.
+    }
+  } catch {}
+}
+
+function throwingLoopBody(iter) {
+  try {
+    for (const x of iter) {
+      throw new Error();
+    }
+  } catch {}
+}`);
+
+async function runTest(expression, expectedNumberOfPauses = 1) {
+  await Promise.all([
+    Protocol.Debugger.enable(),
+    Protocol.Debugger.setPauseOnExceptions({state: 'uncaught'}),
+  ]);
+
+  // Don't pause.
+  await Protocol.Runtime.evaluate({ expression, replMode: true });
+  InspectorTest.log('Not pausing for uncaught exception: SUCCESS');
+
+  // Run the same expression but with 'caught' and expect a pause.
+  await Protocol.Debugger.setPauseOnExceptions({ state: 'caught' });
+  const evalPromise = Protocol.Runtime.evaluate({ expression, replMode: true });
+
+  for (let x = 1; x <= expectedNumberOfPauses; ++x) {
+    await Protocol.Debugger.oncePaused();
+    InspectorTest.log(`Pause no. ${x} for caught exception: SUCCESS`);
+    await Protocol.Debugger.resume();
+  }
+
+  await Promise.all([
+    Protocol.Debugger.disable(),
+    evalPromise,
+  ]);
+}
+
+InspectorTest.runAsyncTestSuite([
+  async function testThrowingGenerator() {
+    await runTest('callGen()');
+  },
+  async function testThrowingNext() {
+    await runTest('iterateIterator(throwNextIter())');
+  },
+  async function testThrowingReturn() {
+    await runTest('breakingLoopBody(throwReturnIter())');
+  },
+  async function testThrowingLoopBody() {
+    await runTest('throwingLoopBody([1, 2])');
+  },
+  async function testThrowingLoopBodyAndThrowingReturn() {
+    await runTest('throwingLoopBody(throwReturnIter())', 2);
+  },
+]);