IndexError: pop from empty list

Zum Reproduzieren

Während der Ausführung von GET auf /attachment/ticket/10926/ hat Trac einen internen Fehler gemeldet.

(Bitte geben Sie hier weitere Details an)

Anfrageparameter:

{u'action': u'new', 'path': u'10926/', 'realm': u'ticket'}

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.21 (KHTML, like Gecko) konqueror/4.14.9 Safari/537.21

Systeminformationen

Systeminformation nicht verfügbar

Aktive Plugins

Plugininformation nicht verfügbar

Python-Zurückverfolgungsinformationen

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/Trac-1.0.9-py2.7.egg/trac/web/main.py", line 554, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/lib/python2.7/dist-packages/Trac-1.0.9-py2.7.egg/trac/web/main.py", line 267, in dispatch
    iterable=chrome.use_chunked_encoding)
  File "/usr/local/lib/python2.7/dist-packages/Trac-1.0.9-py2.7.egg/trac/web/chrome.py", line 1111, in render_template
    encoding='utf-8')
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 184, in render
    return encode(generator, method=method, encoding=encoding, out=out)
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 58, in encode
    for chunk in iterator:
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 350, in __call__
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 829, in __call__
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 669, in __call__
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 774, in __call__
    for kind, data, pos in chain(stream, [(None, None, None)]):
  File "/usr/local/lib/python2.7/dist-packages/genshi/output.py", line 594, in __call__
    for ev in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/Trac-1.0.9-py2.7.egg/trac/web/chrome.py", line 1309, in _strip_accesskeys
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/Trac-1.0.9-py2.7.egg/trac/web/chrome.py", line 1298, in _generate
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/transform.py", line 706, in _unmark
    for mark, event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/transform.py", line 1101, in __call__
    for mark, event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/transform.py", line 118, in __iter__
    event = self.stream.next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/transform.py", line 734, in __call__
    for mark, event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/transform.py", line 702, in _mark
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 618, in _include
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 362, in _match
    content = list(content)
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 618, in _include
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 326, in _match
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 315, in _strip
    event = next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 558, in _flatten
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/path.py", line 588, in _generate
    subevent = next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 618, in _include
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 315, in _strip
    event = next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 558, in _flatten
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/core.py", line 289, in _ensure
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/path.py", line 588, in _generate
    subevent = next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 618, in _include
    for event in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/markup.py", line 315, in _strip
    event = next()
  File "/usr/local/lib/python2.7/dist-packages/genshi/template/base.py", line 558, in _flatten
    for kind, data, pos in stream:
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/i18n.py", line 178, in _generate
    for event in msgbuf.translate(gettext(msgbuf.format())):
  File "/usr/local/lib/python2.7/dist-packages/genshi/filters/i18n.py", line 1051, in translate
    events = self.events[order].pop(0)
IndexError: pop from empty list

Trac metadata

Trac field	Value
Version
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Trac & Git
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 5

added Tbug Trac import infrastructure labels

To reproduce:

• go to preferences, and change the language to German: https://ghc.haskell.org/trac/ghc/prefs
• try to attach an attachment to a ticket
• You will get the 'IndexError: pop from empty list' error

Workaround: keep the default language.

Upstream ticket: http://trac.edgewall.org/ticket/11184

Cause: bug in Genshi library, versions 0.6.1 and 0.7.0 (they are maintaining 0.6.x and 0.7.x release lines in parallel).

Solution: downgrade to Genshi version 0.6 (versions 0.6.2 and 0.7.1 are not released yet)

How: sudo easy_install Genshi==0.6

closed

This is fixed (I tested it). @hvr downgraded Genshi to version 0.6 as per ticket:10927#comment:111462.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

changed milestone to %8.0.1

mentioned in issue #14294 (closed)

This happens again for me as of recently. It used to work a few days earlier.

reopened

Yes, the bug is back.

CC @hvr

Trac metadata

Trac field	Value
Resolution	ResolvedFixed → Unresolved

Trac metadata

Trac field	Value
CC	- → hvr

closed

added Pnormal label