Sorry. Use the same version as pypy's pyrepl.

Author: arigo

pyrepl/unix_console.py

@@ -411,9 +411,12 @@ def push_char(self, char):
                    e.args[4] == 'unexpected end of data':
                 pass
             else:
-                #raise  -- but better to ignore UnicodeDecodeErrors here...
+                # was: "raise".  But it crashes pyrepl, and by extension the
+                # pypy currently running, in which we are e.g. in the middle
+                # of some debugging session.  Argh.  Instead just print an
+                # error message to stderr and continue running, for now.
                 self.partial_char = ''
-                return
+                sys.stderr.write('\n%s: %s\n' % (e.__class__.__name__, e))
         else:
             self.partial_char = ''
             self.event_queue.push(c)