Fixing the repl so that errors print properly, and async exceptions are logged instead of killing the session.

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) {

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> '