id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	branch	branch_author	launchpad_bug
4910	No indication that error comes from log.err	jml		"Just helping someone debug a failing test, got this error:

{{{
[ERROR]
Traceback (most recent call last):
Failure: twisted.protocols.ftp.IsNotADirectoryError: blah

twisted.test.test_ftp.FTPServerTestCaseAdvancedClient.test_STORwriteError
}}}

Turns out that the error comes from a call to log.err. There's no hint of this in the error message, and error messages from tests are supposed to help you isolate errors.
"	defect	closed	normal		trial	duplicate		jml