From 971d381f54e7e241db82e8cfbbd6713620188f58 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 25 Feb 2026 15:03:30 +0000
Subject: [PATCH 1/2] Initial plan


From 70bb4591860d3eaa19c9a566087f44312a26a13a Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 25 Feb 2026 15:06:07 +0000
Subject: [PATCH 2/2] Fix Cannot read property 'name' of undefined when
 e.reason is null/undefined

Co-authored-by: niemyjski <1020579+niemyjski@users.noreply.github.com>
---
 package-lock.json     |  8 ++++++--
 spec/tracekit-spec.js | 14 ++++++++++++++
 tracekit.js           |  4 ++--
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index c8364f1..8f54564 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "tracekit",
-  "version": "0.4.7",
+  "version": "0.4.8",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "tracekit",
-      "version": "0.4.7",
+      "version": "0.4.8",
       "license": "MIT",
       "devDependencies": {
         "grunt": "1.6.1",
@@ -107,6 +107,7 @@
       "integrity": "sha512-GKMHFfv3458yYy+v/N8gjufHO6MSZKCOXpZc5GXIWWy8uldwfmPn98vp81gZ5f9SVw8YYBctgfJ22a2d7AOMeQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/linkify-it": "*",
         "@types/mdurl": "*"
@@ -2076,6 +2077,7 @@
       "resolved": "https://registry.npmjs.org/karma/-/karma-6.4.4.tgz",
       "integrity": "sha512-LrtUxbdvt1gOpo3gxG+VAJlJAEMhbWlM4YrFQgql98FwF7+K8K12LYO4hnDdUkNjeztYrOXEMqgTajSWgmtI/w==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "@colors/colors": "1.5.0",
         "body-parser": "^1.19.0",
@@ -3662,6 +3664,7 @@
       "resolved": "https://registry.npmjs.org/@types/markdown-it/-/markdown-it-12.2.3.tgz",
       "integrity": "sha512-GKMHFfv3458yYy+v/N8gjufHO6MSZKCOXpZc5GXIWWy8uldwfmPn98vp81gZ5f9SVw8YYBctgfJ22a2d7AOMeQ==",
       "dev": true,
+      "peer": true,
       "requires": {
         "@types/linkify-it": "*",
         "@types/mdurl": "*"
@@ -5128,6 +5131,7 @@
       "resolved": "https://registry.npmjs.org/karma/-/karma-6.4.4.tgz",
       "integrity": "sha512-LrtUxbdvt1gOpo3gxG+VAJlJAEMhbWlM4YrFQgql98FwF7+K8K12LYO4hnDdUkNjeztYrOXEMqgTajSWgmtI/w==",
       "dev": true,
+      "peer": true,
       "requires": {
         "@colors/colors": "1.5.0",
         "body-parser": "^1.19.0",
diff --git a/spec/tracekit-spec.js b/spec/tracekit-spec.js
index 36e36cc..397136e 100644
--- a/spec/tracekit-spec.js
+++ b/spec/tracekit-spec.js
@@ -87,6 +87,20 @@
         expect(stack.message).toEqual('test');
       });
 
+      it('should handle undefined (e.g. from Promise.reject())', function () {
+        var stack = TraceKit.computeStackTrace(undefined);
+        expect(stack.name).toBeFalsy();
+        expect(stack.message).toBeFalsy();
+        expect(stack.mode).toEqual('failed');
+      });
+
+      it('should handle null (e.g. from Promise.reject(null))', function () {
+        var stack = TraceKit.computeStackTrace(null);
+        expect(stack.name).toBeFalsy();
+        expect(stack.message).toBeFalsy();
+        expect(stack.mode).toEqual('failed');
+      });
+
       it('should handle a native error object stack from Chrome', function () {
         var stackStr = '' +
           'Error: foo\n' +
diff --git a/tracekit.js b/tracekit.js
index 37252b0..7536eb9 100644
--- a/tracekit.js
+++ b/tracekit.js
@@ -1242,8 +1242,8 @@ TraceKit.computeStackTrace = (function computeStackTraceWrapper() {
         }
 
         return {
-            'name': ex.name,
-            'message': ex.message,
+            'name': ex && ex.name,
+            'message': ex && ex.message,
             'mode': 'failed'
         };
     }