"RuntimeWarning: tp_compare" error debugging
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Strange problem while running PyDev 1.2.9 with Eclipse SDK 3.2.1 on Windows XP.
The following simple script:
import simplejson
print simplejson.loads('"foo"')
Produces the following on the Console when under "Debug":
pydev debugger
C:\Python25\Lib\threading.py:699: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
return _active[_get_ident()]
Traceback (most recent call last):
File "C:\Program Files\Eclipse-WTP\plugins\org.python.pydev.debug_1.2.9\pysrc\pydevd.py", line 475, in trace_dispatch
t = threading.currentThread()
File "c:\python25\lib\threading.py", line 699, in currentThread
return _active[_get_ident()]
GeneratorExit
Exception exceptions.SystemError: 'error return without exception set' in <generator object at 0x00C76378> ignored
pydev debugger
C:\Python25\Lib\threading.py:699: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
return _active[_get_ident()]
Traceback (most recent call last):
File "C:\Program Files\Eclipse-WTP\plugins\org.python.pydev.debug_1.2.9\pysrc\pydevd.py", line 475, in trace_dispatch
t = threading.currentThread()
File "c:\python25\lib\threading.py", line 699, in currentThread
return _active[_get_ident()]
GeneratorExit
Exception exceptions.SystemError: 'error return without exception set' in <generator object at 0x00C76378> ignored
foo
Under "Run", no such trouble.
This is with several versions of the Cheeseshop's simplejson module. I haven't been able to reproduce this with other modules, but what could simplejson be doing to cause this.
Awesome tool PyDev, btw, thanks!
Jaime
Strange... I really don't know what could be doing 'threading.currentThread()' give an error... it could be that simplejson does something in this regard (have you asked to the simplejson developers? -- it might be that they are doing some strange interaction with the threading or tracing facility that is making this appear while in debug mode)
We observed a similar error with our system which has nothing to do with JSON. I was able to narrow it down to this little script:
import tokenize
def next(token, string, start, end, line):
raise tokenize.StopTokenizing()
def getEmptyString():
return ''
tokenize.tokenize(getEmptyString, next)
The script reliably produces the below output when debugging under PyDev with Python 2.5. The script completes with out error when "Running" under PyDev or when using Python 2.4.
pydev debugger
/usr/lib64/python2.5/threading.py:699: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
return _active[_get_ident()]
Traceback (most recent call last):
File "/home/bingham/eclipse/plugins/org.python.pydev.debug_1.3.4/pysrc/pydevd.py", line 520, in trace_dispatch
t = threading.currentThread()
File "/usr/lib64/python2.5/threading.py", line 699, in currentThread
return _active[_get_ident()]
GeneratorExit
Exception exceptions.SystemError: 'error return without exception set' in <generator object at 0x8563f8> ignored
Aaron
It appears a python bug... I can reproduce it with the code below (without the debugger)
import threading
def func(frame, event, arg):
try:
threading.currentThread()
except:
print 'Ok, I have no clues why an exception is raised here'
return func
import sys
sys.settrace(func)
import tokenize
def next(token, string, start, end, line):
raise tokenize.StopTokenizing()
def getEmptyString():
return ''
tokenize.tokenize(getEmptyString, next)
Not sure, looking through their source, there is no mention or usage of threading related modules. You wouldn't expect them to be as, as the name implies, it's just a simple JSON encoder/decoder.
Added to python bug tracker: http://sourceforge.net/tracker/index.php?func=detail&aid=1733757&group_id=5470&atid=105470