replying to a ticket comment yields 'No ngettext function available'

[Eli Carter]

Steps to reproduce:

• create a ticket
• comment on the ticket
• reply to the comment on the ticket using the Reply link

When you hit submit, you'll get AssertionError: No ngettext function available

File "/home/eli/devel/trac-trunk/trac/web/main.py", line 499, in _dispatch_request
  dispatcher.dispatch(req)
File "/home/eli/devel/trac-trunk/trac/web/main.py", line 253, in dispatch
  content_type)
File "/home/eli/devel/trac-trunk/trac/web/chrome.py", line 860, in render_template
  stream.render(method, doctype=doctype, out=buffer)
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 183, in render
  return encode(generator, method=method, encoding=encoding, out=out)
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 57, in encode
  for chunk in iterator:
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 337, in __call__
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 823, in __call__
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 667, in __call__
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 768, in __call__
  for kind, data, pos in chain(stream, [(None, None, None)]):
File "/home/eli/devel/genshi-trunk/genshi/output.py", line 583, in __call__
  for ev in stream:
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 288, in _ensure
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 288, in _ensure
  for event in stream:
File "/home/eli/devel/trac-trunk/trac/web/chrome.py", line 964, in _strip_accesskeys
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 288, in _ensure
  for event in stream:
File "/home/eli/devel/trac-trunk/trac/web/chrome.py", line 953, in _generate
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 592, in _include
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/template/markup.py", line 380, in _match
  ctxt, start=idx + 1, **vars):
File "/home/eli/devel/genshi-trunk/genshi/template/markup.py", line 380, in _match
  ctxt, start=idx + 1, **vars):
File "/home/eli/devel/genshi-trunk/genshi/template/markup.py", line 330, in _match
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 532, in _flatten
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 288, in _ensure
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/path.py", line 588, in _generate
  subevent = next()
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 592, in _include
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/template/markup.py", line 319, in _strip
  event = next()
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 532, in _flatten
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/core.py", line 288, in _ensure
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/path.py", line 588, in _generate
  subevent = next()
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 592, in _include
  for event in stream:
File "/home/eli/devel/genshi-trunk/genshi/template/markup.py", line 319, in _strip
  event = next()
File "/home/eli/devel/genshi-trunk/genshi/template/base.py", line 532, in _flatten
  for kind, data, pos in stream:
File "/home/eli/devel/genshi-trunk/genshi/filters/i18n.py", line 321, in __call__
  assert callable(ngettext), "No ngettext function available"

[Remy Blank]

This only happens when Babel is not installed. One possible fix is to return a NullTranslations subclass from get_translations()​, as hinted in the comment.

[Eli Carter]

Testcase added to the functional tests in [9271].

[Remy Blank]

Fix committed in [9272] (with follow-up in [9273]). Unfortunately, this now triggers an XHTML validation error due to <blockquote> being placed in the wrong context.

[Remy Blank]

The XHTML validation issue is fixed in [9274], by closing an open paragraph before opening a <blockquote>.