catch exceptions on prompts. Close #202.

IPython/iplib.py

@@ -6,7 +6,7 b' Requires Python 2.3 or newer.'
 
 This file contains all the classes and helper functions specific to IPython.
 
-$Id: iplib.py 2912 2007-12-30 23:27:09Z vivainio $
+$Id: iplib.py 2914 2007-12-31 12:53:16Z vivainio $
 """
 
 #*****************************************************************************
@@ -1672,12 +1672,18 b' want to merge them back into the new files.""" % locals()'
         
         while not self.exit_now:
             if more:
-                prompt = self.hooks.generate_prompt(True)
+                try:
+                    prompt = self.hooks.generate_prompt(True)
+                except:
+                    self.showtraceback()
                 if self.autoindent:
                     self.rl_do_indent = True
                     
             else:
-                prompt = self.hooks.generate_prompt(False)
+                try:
+                    prompt = self.hooks.generate_prompt(False)
+                except:
+                    self.showtraceback()
             try:
                 line = self.raw_input(prompt,more)
                 if self.exit_now: