TypeError: %d format: a number is required, not Undefined

[Ryan J Ollos]

How to Reproduce

While doing a GET operation on /wiki/WikiStart, Trac issued an internal error.

I noticed this issue in the logs.

Request parameters:

{u'action': u'delete', 'page': u'WikiStart'}

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36

System Information

Trac	1.3.2.dev0
Babel	2.3.4
dnspython	1.12.0
Docutils	0.12
Genshi	0.7 (with speedups)
GIT	2.1.4
Jinja2	2.9.5
Mercurial	3.1.2
mod_wsgi	4.5.13 (WSGIProcessGroup trac WSGIApplicationGroup %{GLOBAL})
Pillow	2.6.1
PostgreSQL	server: 9.4.10, client: 9.4.10
psycopg2	2.5.4
Pygments	2.0.1
Python	2.7.9 (default, Jun 29 2016, 13:11:10) [GCC 4.9.2]
pytz	2012c
setuptools	34.3.1
SpamBayes	1.1b1
Subversion	1.8.10 (r1615264)
jQuery	1.11.3
jQuery UI	1.11.4
jQuery Timepicker	1.5.5

Enabled Plugins

help-guide-version-notice	N/A
milestone-to-version	r15098
StatusFixer	r6326
TracMercurial	1.0.0.7.dev0
TracSpamFilter	1.3.0.dev0
TracVote	0.6.0.dev0
TracWikiExtras	1.3.1.dev0
TranslatedPagesMacro	0.5

Interface Customization

shared-htdocs
shared-templates
site-htdocs
site-templates	site.html, site_footer.html, site_head.html, site_header.html, site_leftbox.html

Python Traceback

Traceback (most recent call last):
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/web/main.py", line 632, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/web/main.py", line 273, in dispatch
    method=method)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/web/chrome.py", line 1365, in render_template
    fragment, iterable, method)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/web/chrome.py", line 1457, in _render_jinja_template
    iterable)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/web/chrome.py", line 1571, in generate_template_stream
    bytes = template.render(data).encode('utf-8')
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/wiki/templates/wiki_delete.html", line 12, in top-level template code
    # extends 'layout.html'
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/templates/layout.html", line 12, in top-level template code
    # import "macros.html" as jmacros with context
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/templates/theme.html", line 22, in top-level template code
    # block body
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/templates/theme.html", line 157, in block "body"
    # block content
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/wiki/templates/wiki_delete.html", line 133, in block "content"
    ngettext("%(num)d version", "all %(num)d versions", num=versions)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/util/translation.py", line 219, in ngettext
    return _ngettext()
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/util/translation.py", line 216, in _ngettext
    return safefmt(trans, kwargs)
  File "/usr/local/virtualenv/1.3dev/lib/python2.7/site-packages/trac/util/translation.py", line 31, in safefmt
    return string % kwargs
TypeError: %d format: a number is required, not Undefined

[Ryan J Ollos]

Duplicate of #12738.