id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
1785	debug.py assumes _get_lines_from_file() doesn't return None	django@…	Adrian Holovaty	"if an error occurs during view processing, debug.py has a bug such that, on occasion, debug traceback printing fails and you cannot see what your error was.  Here's the debug.py traceback.  Also see the attached patch for a fix that works in my development environment.


Development server is running at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
[06/May/2006 13:39:57] ""GET /rate/1/3?dojo.transport=xmlhttp& HTTP/1.1"" 301 0
Traceback (most recent call last):
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/core/servers/basehttp.py"", line 272, in run
    self.result = application(self.environ, self.start_response)
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/core/servers/basehttp.py"", line 615, in __call__
    return self.application(environ, start_response)
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/core/handlers/wsgi.py"", line 145, in __call__
    response = self.get_response(request.path, request)
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/core/handlers/base.py"", line 100, in get_response
    return self.get_technical_error_response(request)
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/core/handlers/base.py"", line 133, in get_technical_error_response
    return debug.technical_500_response(request, *sys.exc_info())
  File ""/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/django/views/debug.py"", line 100, in technical_500_response
    frames.append({
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'
[06/May/2006 13:39:57] ""GET /rate/1/3/?dojo.transport=xmlhttp HTTP/1.1"" 500 1349

"		closed	Core (Other)		major	fixed			Unreviewed	0	0	0	0	0	0