From ee89d3766a1645e6455d9b8c5297f96ab691bc1e Mon Sep 17 00:00:00 2001
From: Chris Breneman <crispy@cluenet.org>
Date: Mon, 16 Mar 2015 15:58:47 -0400
Subject: [PATCH] Don't print an error and exit on uncaughtException if there
 are other uncaughtException listeners present.

---
 source-map-support.js |  4 +++-
 test.js               | 11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/source-map-support.js b/source-map-support.js
index 07048d8..63163ec 100644
--- a/source-map-support.js
+++ b/source-map-support.js
@@ -335,7 +335,9 @@ function getErrorSource(error) {
 
 // Mimic node's stack trace printing when an exception escapes the process
 function handleUncaughtExceptions(error) {
-  if (!error || !error.stack) {
+  if (process.listeners('uncaughtException').length > 1) {
+    return;
+  } else if (!error || !error.stack) {
     console.log('Uncaught exception:', error);
   } else {
     var source = getErrorSource(error);
diff --git a/test.js b/test.js
index f2bf344..2fd51bf 100644
--- a/test.js
+++ b/test.js
@@ -296,6 +296,17 @@ it('handleUncaughtExceptions is false', function(done) {
   ]);
 });
 
+it('handleUncaughtExceptions is true with existing listener', function(done) {
+  compareStdout(done, createSingleLineSourceMap(), [
+    'process.on("uncaughtException", function() { console.log("exception handler"); });',
+    'function foo() { throw new Error("this is the error"); }',
+    'require("./source-map-support").install({ handleUncaughtExceptions: false });',
+    'process.nextTick(foo);'
+  ], [
+    'exception handler'
+  ]);
+});
+
 it('default options with empty source map', function(done) {
   compareStdout(done, createEmptySourceMap(), [
     '',