Kurt B. Kaiser <[EMAIL PROTECTED]> added the comment: I don't think that this is an IDLE error. It can be more generally exhibited as follows:
Without the subprocess we get the expected: IDLE 3.0a4 ==== No Subprocess ==== >>> eval('a') Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> eval('a') File "<string>", line 1, in <module> NameError: name 'a' is not defined With the subprocess there is an interpreter error when IDLE applies eval to 'a': IDLE 3.0a4 >>> eval('a') Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> eval('a') SystemError: error return without exception set I did a cutdown where I ran the eval in a subprocess and didn't reproduce the error. I suspect it's thread related (the subprocess uses its main thread to execute user code, and another thread to manage the socket connection to the GUI process). issue1733757 is suggestive. This is a 3.0 issue, it doesn't occur in the trunk. ---------- assignee: kbk -> components: +Interpreter Core -IDLE nosy: +amaury.forgeotdarc priority: normal -> high title: Py30a3: calltip produces error output to stderr -> Py30a3: eval in threaded code raises SystemError __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2221> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com