I've managed to narrow this down more to a test that reads a login form and
sets 3 fields in that form. While this test completes fine on it's own,
if it attempts to set any of those form fields, subsequent tests will
generate a Seg Fault. The test calls a method to login in which I've
commented out large portions of the functionality in order to narrow down
the problematic operation. By a crude binary search of adding 'return
True' to various locations in the method I was able to find the code that
seemed crucial to controlling the occurance of Seg Faults. Below this
code is a small excerpt of a stack trace resulting from the next test after
this.
def login(self, rd=None):
"""Login to the PACER court site"""
if self._logged_in:
return True
login_url = urljoin(self._base_url, self.LOGIN_URL)
log.debug("Logging in...")
login_page = self._visit(login_url)
log.debug("Got login form, pausing...")
login_info = html.fromstring(login_page.text)
login_form = login_info.forms[0]
print ("login %s, key %s, clcode %s", self.user_name,
self.user_password, self.CLIENT_CODE)
form_fields = login_form.fields
print ("login_form %s", list(form_fields.items()))
#return True # THIS WORKS
form_fields['login'] = self.user_name
form_fields['key'] = self.user_password
form_fields['clcode'] = self.CLIENT_CODE
return True # THIS DOES NOT WORK
"""
login_form.fields = form_fields
#return True
log.debug("Submitting login: %s", login_form.form_values())
self._pause()
#return True
response = self.s.post(login_url,
data=login_form.form_values(),
cookies=self.cookies)
self.load_cookies(response.content)
self._show_receipts = True
#2nd call to verify login
resp = self.s.get(login_url,
cookies=self.cookies)
if 'Last login:' not in resp.content:
raise PacerLoginException(login_url)
self._logged_in = True
self.last_response = resp
if rd is not None:
from bias.utils import save_pacer_cookies
save_pacer_cookies(rd, self)
return True
"""
A stack trace excerpt:
test_case_tags (bias.tests.loaders.test_pacer.TestCaseLoader) ... *** glibc
detected *** /home/jeff/lexmachina/deus_lex/.tox/pypy/bin/pypy
/home/jeff/lexmachina/deus_lex/.tox/pypy/bin/nosetests -v -x bias:
corrupted double-linked list: 0x0000000004c13eb0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x75be6)[0x7fe5e3fadbe6]
/lib/x86_64-linux-gnu/libc.so.6(+0x7605d)[0x7fe5e3fae05d]
/lib/x86_64-linux-gnu/libc.so.6(+0x77518)[0x7fe5e3faf518]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7fe5e3fb298c]
/usr/lib/x86_64-linux-gnu/libxml2.so.2(xmlHashFree+0xfa)[0x7fe5dddab28a]
/usr/lib/x86_64-linux-gnu/libxml2.so.2(xmlXPathRegisteredNsCleanup+0x1f)[0x7fe5dddd673f]
/usr/lib/x86_64-linux-gnu/libxml2.so.2(xmlXPathFreeContext+0x22)[0x7fe5dddd99d2]
/home/jeff/lxml/src/lxml/etree.pypy-26.so(+0x48049)[0x7fe5de546049]
