AttributeError: '_SnippetsFileParser' object has no attribute '_sm'

[blueyed]

This just happened, when I have triggered Ultisnips:

An error occured. This is either a bug in UltiSnips or a bug in a
snippet definition.  See doc/UltiSnips-Quickstart.txt about how to contact the
maintainer for this UltiSnips fork and where you should file a bug report

Following is the full stack trace:
Traceback (most recent call last):
  File "ultisnips/py-code/UltiSnips/__init__.py", line 26, in wrapper
    return f(self, *args, **kwds)
  File "ultisnips/py-code/UltiSnips/__init__.py", line 637, in expand_or_jump
    rv = self._try_expand()
  File "ultisnips/py-code/UltiSnips/__init__.py", line 979, in _try_expand
    snippets = self._snips(before, False)
  File "ultisnips/py-code/UltiSnips/__init__.py", line 895, in _snips
    for snippet in ss.snippets():
  File "ultisnips/py-code/UltiSnips/__init__.py", line 557, in snippets
    self.parse(mtime)
  File "ultisnips/py-code/UltiSnips/__init__.py", line 549, in parse
    p.parse()
  File "ultisnips/py-code/UltiSnips/__init__.py", line 253, in parse
    p = _SnippetsFileParser(self._ft, filename, self._sm.snippet_error, None)
AttributeError: '_SnippetsFileParser' object has no attribute '_sm'

[MarcWeber]

Your'e a dev, right? So you should know what is required for me to reproduce a bug: 1) yoru snippets 2) your config 3) your action in Vim.
The fastest way would be you pinging me on irc, then we both reproducing your setup on my server, us then fixing it

[blueyed]

I just wanted to leave it here for later (quickly copy'n'pasted), and I did not remember what triggered it.

From looking at the code it appears as follows:

1. _sm is only used in the code around there (in parse).
2. the positional argument to _SnippetsFileParser is meant to be a error function, and is assigned as self._error_fun in init.
3. Since this is meant to be a recursion, it seems like self._error_fun should be used here instead.

The 2nd reference to self._sm below should probably get replaced by UltiSnips_Manager:

        elif head == "clearsnippets":
            self._sm.clear_snippets(tail.split(), self._ft)

To reproduce it you probably just need a snippet with "extends" (this issue) and "clearsnippets", second issue.

I am committing a fix (to my repo), please take a look at it and cherry-pick/merge it if it's OK.