dapper error with Wrong XPath-Expr in Subscribers.parse() '__xml'

Bug #220679 reported by Brian Murray on 2008-04-22
Affects Status Importance Assigned to Milestone
Bug Helper
Markus Korn

Bug Description

When executing the following query on Dapper, python 2.4.3:

bugnumbers --parsemode=html --ns ">5" -p xorg

I receive this error message:

Traceback (most recent call last):
  File "./bugnumbers", line 324, in ?
  File "./bugnumbers", line 257, in main
    bl = BugList(cl.options.url)
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/connector.py", line 111, in __call__
    filter=self.__buglist_filter, all_tasks=self.__all_tasks)
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/html_buglist.py", line 123, in __init__
    all_tasks, start_bugs, BugPage)
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/buglistbase.py", line 85, in __init__
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/buglistbase.py", line 171, in _add
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/basebuglistfilter.py", line 166, in filter
    r = set(_iter_bugs())
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/basebuglistfilter.py", line 162, in _iter_bugs
    yield f(b)
  File "./bugnumbers", line 42, in _no_by_attribute
    a = getattr(bug, attribute)
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/lphelper.py", line 261, in <lambda>
    if fget : fget = lambda s, n=fget.__name__ : getattr(s, n)()
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/html_bug.py", line 87, in func
  File "/home/brian/source_trees/bughelper/main/launchpadbugs/html_bug.py", line 922, in parse
    assert self.__xml, "Wrong XPath-Expr in Subscribers.parse() '__xml' (%s)" %(DEBUG_URL or "unknown")
AssertionError: Wrong XPath-Expr in Subscribers.parse() '__xml' (https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/155685)

This is negatively affecting some reports that I run. I am using bughelper revno 210 and python-launchpad-bugs revno 88. The same query does not fail on Hardy.

Markus Korn (thekorn) wrote :

I can confirm this bug, it is Bug 137574 again. dapper's libxml2 stops parsing this bugreport silently.
I will try to find a workaround tomorrow morning.


Changed in python-launchpad-bugs:
assignee: nobody → thekorn
importance: Undecided → Medium
status: New → Confirmed
Markus Korn (thekorn) wrote :

This patch against py-lp-bugs rev 88 should fix this error, it's not optimal but I fear we can not do anything else as it's libxml2 which is actually broken in dapper.

Please review & test this.


Brian Murray (brian-murray) wrote :

This resolved the issue with that bug on Dapper and could be merged with main.

Changed in bughelper:
status: New → Invalid
Changed in python-launchpad-bugs:
status: Confirmed → Triaged
Markus Korn (thekorn) wrote :

revno: 93
committer: Markus Korn <email address hidden>
branch nick: main
timestamp: Fri 2008-05-09 09:07:59 +0200
  * launchpadbugs/lphelper.py: fixed html-parser for Dapper again,
    workaround for broken libxml2 (LP: #220679)

Changed in python-launchpad-bugs:
status: Triaged → Fix Committed
Brian Murray (brian-murray) wrote :

This bug is fixed in the current main branch of python-launchpad-bugs.

Changed in python-launchpad-bugs:
status: Fix Committed → Fix Released
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