Error when loading admin plugin page

[Matt Hess]

We log to syslog on our server and are getting this error:

Apr 24 13:13:25 ts01 ¿<11>Trac[web_ui] ERROR: Unable to render component documentation: #012Traceback (most recent call last):#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/admin/web_ui.py", line 566, in safe_wiki_to_html#012    return format_to_html(self.env, context, text)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1546, in format_to_html#012    return HtmlFormatter(env, context, wikidom).generate(escape_newlines)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1501, in generate#012    escape_newlines)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1244, in format#012    self.handle_code_block(line, block_start_match)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1134, in handle_code_block#012    processed = self.code_processor.process(code_text)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 356, in process#012    text = self.processor(text)#012  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 343, in _macro_processor#012    text)#012  File "/usr/lib/python2.6/site-packages/JQChart-1.0dev_r12975-py2.6.egg/jqplotchart/macro.py", line 316, in expand_macro#012    json_object = json.loads('{' + json_string + '}')#012  File "/usr/lib64/python2.6/json/__init__.py", line 307, in loads#012    return _default_decoder.decode(s)#012  File "/usr/lib64/python2.6/json/decoder.py", line 319, in decode#012    obj, end = self.raw_decode(s, idx=_w(s, 0).end())#012  File "/usr/lib64/python2.6/json/decoder.py", line 336, in raw_decode#012    obj, end = self._scanner.iterscan(s, **kw).next()#012  File "/usr/lib64/python2.6/json/scanner.py", line 55, in iterscan#012    rval, next_pos = action(m, context)#012  File "/usr/lib64/python2.6/json/decoder.py", line 171, in JSONObject#012    raise ValueError(errmsg("Expecting property name", s, end))#012

[Ryan J Ollos]

The traceback looks like it has a bunch of #012 entries where there should be line breaks. Could you try re-posting it?

[Matt Hess]

Replying to rjollos:

The traceback looks like it has a bunch of #012 entries where there should be line breaks. Could you try re-posting it?

Hopefully this is better:

2013-04-24 20:18:56,134 Trac[web_ui] ERROR: Unable to render component documentation: 
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/admin/web_ui.py", line 566, in safe_wiki_to_html
    return format_to_html(self.env, context, text)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1546, in format_to_html
    return HtmlFormatter(env, context, wikidom).generate(escape_newlines)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1501, in generate
    escape_newlines)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1244, in format
    self.handle_code_block(line, block_start_match)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 1134, in handle_code_block
    processed = self.code_processor.process(code_text)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 356, in process
    text = self.processor(text)
  File "/usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/wiki/formatter.py", line 343, in _macro_processor
    text)
  File "/usr/lib/python2.6/site-packages/JQChart-1.0dev_r12975-py2.6.egg/jqplotchart/macro.py", line 316, in expand_macro
    json_object = json.loads('{' + json_string + '}')
  File "/usr/lib64/python2.6/json/__init__.py", line 307, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python2.6/json/decoder.py", line 319, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python2.6/json/decoder.py", line 336, in raw_decode
    obj, end = self._scanner.iterscan(s, **kw).next()
  File "/usr/lib64/python2.6/json/scanner.py", line 55, in iterscan
    rval, next_pos = action(m, context)
  File "/usr/lib64/python2.6/json/decoder.py", line 171, in JSONObject
    raise ValueError(errmsg("Expecting property name", s, end))
ValueError: Expecting property name: line 1 column 2 (char 2)

[anonymous]

The 'Expecting property name' message looks like as an invalid json in the macro body. I used python json parser, that is somewhat strict in it syntax: you need to put quotes around property names:

{{{
#!JQChart
  type: "MeterGauge",
  ...
}}}

won't work.

{{{
#!JQChart
  "type": "MeterGauge",
  ...
}}}

is ok.

I have to improve the error reporting, though ...

[Ryan J Ollos]

In 17840:

1.0dev: Fix exception on admin page

Fixes #11034.