IndexError when showing traceback at Pylons #135
Description
Migrated issue, originally created by Anonymous
Pylons has a _debug controller that shows past exception tracebacks. When a user follows the debug link shown in console an exception occurs:
Exception happened during processing of request from ('127.0.0.1', 49212)
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.6/paste/httpserver.py", line 1068, in process_request_in_thread
self.finish_request(request, client_address)
File "/usr/lib/python2.6/SocketServer.py", line 320, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python2.6/SocketServer.py", line 615, in __init__
self.handle()
File "/usr/lib/pymodules/python2.6/paste/httpserver.py", line 442, in handle
BaseHTTPRequestHandler.handle(self)
File "/usr/lib/python2.6/BaseHTTPServer.py", line 329, in handle
self.handle_one_request()
File "/usr/lib/pymodules/python2.6/paste/httpserver.py", line 437, in handle_one_request
self.wsgi_execute()
File "/usr/lib/pymodules/python2.6/paste/httpserver.py", line 287, in wsgi_execute
self.wsgi_start_response)
File "/usr/lib/pymodules/python2.6/paste/cascade.py", line 130, in __call__
return self.apps[-1](environ, start_response)
File "/usr/lib/pymodules/python2.6/paste/registry.py", line 375, in __call__
app_iter = self.application(environ, start_response)
File "/usr/lib/pymodules/python2.6/pylons/middleware.py", line 200, in __call__
self.app, environ, catch_exc_info=True)
File "/usr/lib/pymodules/python2.6/pylons/util.py", line 91, in call_wsgi_application
app_iter = application(environ, start_response)
File "/usr/lib/pymodules/python2.6/weberror/evalexception.py", line 233, in __call__
return self.debug(req)(environ, start_response)
File "/usr/lib/pymodules/python2.6/weberror/evalexception.py", line 535, in wsgi_application
return self.content()
File "/usr/lib/pymodules/python2.6/weberror/evalexception.py", line 545, in content
result = tmpl_formatter(self.exc_value)
File "/usr/lib/pymodules/python2.6/pylons/error.py", line 43, in mako_html_data
css=False)
File "/usr/lib/pymodules/python2.6/mako/template.py", line 189, in render
return runtime._render(self, self.callable_, args, data)
File "/usr/lib/pymodules/python2.6/mako/runtime.py", line 403, in _render
_render_context(template, callable_, context, *args, **_kwargs_for_callable(callable_, data))
File "/usr/lib/pymodules/python2.6/mako/runtime.py", line 434, in _render_context
_exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
File "/usr/lib/pymodules/python2.6/mako/runtime.py", line 457, in _exec_template
callable_(context, *args, **kwargs)
File "memory:0x249a510", line 54, in render_body
File "/usr/lib/pymodules/python2.6/mako/exceptions.py", line 88, in __init__
self.records = self._init(traceback)
File "/usr/lib/pymodules/python2.6/mako/exceptions.py", line 201, in _init
fp = open(new_trcback[-1][0], 'rb')
IndexError: list index out of range
In particular, trcback is None so any index value would raise an IndexError. This would also be Pylon's fault as the exception is not properly replayed.
A patch is attached.
Attachments: pylons_fix