1 files changed, 103 insertions, 0 deletions
diff --git a/js/src/tests/non262/async-functions/ErrorStack.js b/js/src/tests/non262/async-functions/ErrorStack.js
new file mode 100644
index 0000000000..9f3adc4f72
--- /dev/null
+++ b/js/src/tests/non262/async-functions/ErrorStack.js
@@ -0,0 +1,103 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs drainJobQueue
+
+var BUGNUMBER = 1343158;
+var summary = "Error.stack should provide meaningful stack trace in async function";
+
+print(BUGNUMBER + ": " + summary);
+
+let COOKIE = "C0F5DBB89807";
+
+async function thrower() {
+    let stack = new Error().stack; // line 11
+    assertEq(/^thrower@.+ErrorStack.js:11/m.test(stack), true, toMessage(stack));
+    assertEq(/^inner@.+ErrorStack.js:38/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    throw new Error(COOKIE); // line 18
+}
+
+async function inner() {
+    let stack = new Error().stack; // line 22
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^inner@.+ErrorStack.js:22/m.test(stack), true, toMessage(stack));
+    assertEq(/^middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await Promise.resolve(100);
+
+    stack = new Error().stack; // line 31
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^inner@.+ErrorStack.js:31/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await thrower(); // line 38
+}
+
+async function middle() {
+    let stack = new Error().stack; // line 42
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^middle@.+ErrorStack.js:42/m.test(stack), true, toMessage(stack));
+    assertEq(/^outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await Promise.resolve(1000);
+
+    stack = new Error().stack; // line 51
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^middle@.+ErrorStack.js:51/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await inner(); // line 58
+}
+
+async function outer() {
+    let stack = new Error().stack; // line 62
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/middle@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^outer@.+ErrorStack.js:62/m.test(stack), true, toMessage(stack));
+    assertEq(/^@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await Promise.resolve(10000);
+
+    stack = new Error().stack; // line 71
+    assertEq(/thrower@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/inner@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/middle@.+ErrorStack.js/m.test(stack), false, toMessage(stack));
+    assertEq(/^outer@.+ErrorStack.js:71/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+
+    await middle(); // line 78
+}
+
+try {
+    getPromiseResult(outer()); // line 82
+    assertEq(true, false);
+} catch (e) {
+    // Re-throw the exception to log the assertion failure properly.
+    if (!e.message.includes(COOKIE))
+        throw e;
+
+    let stack = e.stack;
+    assertEq(/^thrower@.+ErrorStack.js:18/m.test(stack), true, toMessage(stack));
+    assertEq(/^inner@.+ErrorStack.js:38/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*middle@.+ErrorStack.js:58/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*outer@.+ErrorStack.js:78/m.test(stack), true, toMessage(stack));
+    assertEq(/^async\*@.+ErrorStack.js:82/m.test(stack), true, toMessage(stack));
+}
+
+function toMessage(stack) {
+    // Provide the stack string in the error message for debugging.
+    return `[stack: ${stack.replace(/\n/g, "\\n")}]`;
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);