From 0821d74838d6b3bf13c75bcf4b7b2a5a225bff14 Mon Sep 17 00:00:00 2001
From: Chirag Bitoni <chiragbitoni4994@gmail.com>
Date: Mon, 9 Nov 2026 02:40:36 +0530
Subject: [PATCH] fix: parse anonymous frame paths with parens and strip async
 prefix

Fix parseLine incorrectly treating paths containing ' (' as function
names in anonymous stack frames that lack closing parentheses. Also
strip leading 'async ' from anonymous and named async frames.

Fixes #76.

Signed-off-by: Chirag Bitoni <chiragbitoni4994@gmail.com>
---
 index.js     |  5 +++++
 test/test.js | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/index.js b/index.js
index f567133..9972374 100644
--- a/index.js
+++ b/index.js
@@ -250,6 +250,9 @@ class StackUtils {
           }
         }
       }
+    } else if (!closeParen && fname) {
+      file = `${fname} (${file}`;
+      fname = undefined;
     }
 
     if (fname) {
@@ -317,6 +320,8 @@ const re = new RegExp(
   '^' +
     // Sometimes we strip out the '    at' because it's noisy
   '(?:\\s*at )?' +
+    // 'async ' prefix on async frames
+  '(?:async )?' +
     // $1 = ctor if 'new'
   '(?:(new) )?' +
     // $2 = function name (can be literally anything)
diff --git a/test/test.js b/test/test.js
index 8721f6c..5c3c9df 100644
--- a/test/test.js
+++ b/test/test.js
@@ -386,6 +386,42 @@ t.test('parseLine: handles parens', t => {
   t.end();
 });
 
+t.test('parseLine: handles anonymous frames with parens in file path', t => {
+  const stackUtils = new StackUtils();
+  t.same(stackUtils.parseLine('    at /home/me/My App (beta)/index.js:4:11'), {
+    line: 4,
+    column: 11,
+    file: '/home/me/My App (beta)/index.js'
+  });
+  t.same(stackUtils.parseLine('    at C:\\Program Files (x86)\\app\\index.js:4:11'), {
+    line: 4,
+    column: 11,
+    file: 'C:/Program Files (x86)/app/index.js'
+  });
+  t.end();
+});
+
+t.test('parseLine: handles async frames', t => {
+  const stackUtils = new StackUtils();
+  t.same(stackUtils.parseLine('    at async /home/me/app/index.js:4:11'), {
+    line: 4,
+    column: 11,
+    file: '/home/me/app/index.js'
+  });
+  t.same(stackUtils.parseLine('async /home/me/app/index.js:4:11'), {
+    line: 4,
+    column: 11,
+    file: '/home/me/app/index.js'
+  });
+  t.same(stackUtils.parseLine('    at async foo (/home/me/app/index.js:4:11)'), {
+    line: 4,
+    column: 11,
+    file: '/home/me/app/index.js',
+    function: 'foo'
+  });
+  t.end();
+});
+
 function linuxStack1() {
   return [
     'Error: foo',