From 77e13e459b321cff1be0935130170761eaa861e6 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Sun, 5 Dec 2010 15:40:49 -0500
Subject: [PATCH] Fixing the repl so that errors print properly, and async
 exceptions are logged instead of killing the session.

---
 lib/repl.js     | 5 ++++-
 src/repl.coffee | 6 +++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/repl.js b/lib/repl.js
index 1e57bb53..044439b9 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -21,10 +21,13 @@
         console.log(val);
       }
     } catch (err) {
-      console.error(err.stack || err.toString());
+      stdio.write(err.stack || err.toString());
     }
     return repl.prompt();
   };
+  process.on('uncaughtException', function(err) {
+    return stdio.write(err.stack || err.toString());
+  });
   repl = readline.createInterface(stdio);
   repl.setPrompt('coffee> ');
   stdio.on('data', function(buffer) {
diff --git a/src/repl.coffee b/src/repl.coffee
index 78e49f73..d18d4b58 100644
--- a/src/repl.coffee
+++ b/src/repl.coffee
@@ -23,9 +23,13 @@ run = (buffer) ->
     val = CoffeeScript.eval buffer.toString(), bare: on, globals: on, fileName: 'repl'
     console.log val if val isnt undefined
   catch err
-    console.error err.stack or err.toString()
+    stdio.write err.stack or err.toString()
   repl.prompt()
 
+# Make sure that uncaught exceptions don't kill the REPL.
+process.on 'uncaughtException', (err) ->
+  stdio.write err.stack or err.toString()
+
 # Create the REPL by listening to **stdin**.
 repl = readline.createInterface stdio
 repl.setPrompt 'coffee> '