When format a traceback of MemoryError, linecache tries to read all lines of source file and likely raises a MemoryError. For example:
http://buildbot.python.org/all/builders/x86%20OpenIndiana%203.x/builds/9712/steps/test/logs/stdio
Traceback (most recent call last):
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 1280, in runtest_inner
test_runner()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/test_socket.py", line 5340, in test_main
support.run_unittest(*tests)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/support/__init__.py", line 1808, in run_unittest
_run_suite(suite)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/support/__init__.py", line 1774, in _run_suite
result = runner.run(suite)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/runner.py", line 176, in run
test(result)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/suite.py", line 84, in __call__
return self.run(*args, **kwds)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/suite.py", line 122, in run
test(result)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/suite.py", line 84, in __call__
return self.run(*args, **kwds)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/suite.py", line 122, in run
test(result)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/case.py", line 625, in __call__
return self.run(*args, **kwds)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/case.py", line 585, in run
self._feedErrorsToResult(result, outcome.errors)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/case.py", line 518, in _feedErrorsToResult
result.addError(test, exc_info)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/runner.py", line 67, in addError
super(TextTestResult, self).addError(test, err)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/result.py", line 17, in inner
return method(self, *args, **kw)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/result.py", line 115, in addError
self.errors.append((test, self._exc_info_to_string(err, test)))
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/unittest/result.py", line 186, in _exc_info_to_string
exctype, value, tb, limit=length, capture_locals=self.tb_locals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 456, in __init__
capture_locals=capture_locals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 341, in extract
f.line
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 270, in line
self._line = linecache.getline(self.filename, self.lineno).strip()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 16, in getline
lines = getlines(filename, module_globals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 44, in getlines
return updatecache(filename, module_globals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 134, in updatecache
lines = fp.readlines()
MemoryError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 532, in main
result = runtest(*args, **kwargs)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 967, in runtest
display_failure=False)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 1304, in runtest_inner
msg = traceback.format_exc()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 161, in format_exc
return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 115, in format_exception
type(value), value, tb, limit=limit).format(chain=chain))
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 456, in __init__
capture_locals=capture_locals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 341, in extract
f.line
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/traceback.py", line 270, in line
self._line = linecache.getline(self.filename, self.lineno).strip()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 16, in getline
lines = getlines(filename, module_globals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 44, in getlines
return updatecache(filename, module_globals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/linecache.py", line 134, in updatecache
lines = fp.readlines()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/codecs.py", line 321, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
MemoryError
Traceback (most recent call last):
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/runpy.py", line 170, in _run_module_as_main
"__main__", mod_spec)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/__main__.py", line 3, in <module>
regrtest.main_in_temp_cwd()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 1564, in main_in_temp_cwd
main()
File "/export/home/buildbot/32bits/3.x.cea-indiana-x86/build/Lib/test/regrtest.py", line 738, in main
raise Exception("Child error on {}: {}".format(test, result[1]))
Exception: Child error on test_socket:
make: *** [buildbottest] Error 1
program finished with exit code 2
Proposed patch clears the cache and repeats an attempt to read source file, and returns empty result if the second attempt fails (as when the source file can't be read).
I hesitate how to classify this issue. On one hand, it looks as new feature, on other hand it is related to testing on all versions. |
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