Invoking goto_assignments fails with KeyError: u'classmethod'

[rakanalh]

Hello,

I am currently using vim-jedi working on one of my python projects. Sometimes when i click g which i mapped to go to assignment, jedi fails:

Traceback (most recent call last):
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi_vim.py", line 110, in wrapper
    return func(*args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi_vim.py", line 220, in goto
    definitions = script.goto_assignments()
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/api/__init__.py", line 378, in goto_assignments
    results = self._goto()
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/api/__init__.py", line 445, in _goto
    defs = self._evaluator.goto(last_name)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/__init__.py", line 369, in goto
    types = self.eval_element(call)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/cache.py", line 41, in wrapper
    rv = function(obj, *args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/__init__.py", line 183, in eval_element
    types = self._eval_atom(element.children[0])
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/__init__.py", line 230, in _eval_atom
    return self.find_types(scope, atom, stmt.start_pos, search_global=True)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/__init__.py", line 120, in find_types
    return f.find(scopes, search_global)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/debug.py", line 52, in wrapper
    result = func(*args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/finder.py", line 87, in find
    types = self._names_to_types(names, search_global)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/finder.py", line 233, in _names_to_types
    new_types = _name_to_types(self._evaluator, name, self.scope)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/cache.py", line 41, in wrapper
    rv = function(obj, *args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/finder.py", line 282, in _name_to_types
    types += imports.ImportWrapper(evaluator, name).follow()
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/cache.py", line 41, in wrapper
    rv = function(obj, *args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/imports.py", line 94, in follow
    types = importer.follow()
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/cache.py", line 41, in wrapper
    rv = function(obj, *args, **kwargs)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/imports.py", line 252, in follow
    return self._do_import(self.import_path, self.sys_path_with_modifications())
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/imports.py", line 347, in _do_import
    module = _load_module(self._evaluator, module_path, source, sys_path)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/imports.py", line 450, in _load_module
    module = load(source) if cached is None else cached.module
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/evaluate/imports.py", line 445, in load
    p = fast.FastParser(evaluator.grammar, common.source_to_unicode(source), p)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/fast.py", line 106, in __call__
    p = super(CachedFastParser, self).__call__(grammar, source, module_path)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/fast.py", line 243, in __init__
    self.update(source)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/fast.py", line 257, in update
    self._parse(source)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/fast.py", line 383, in _parse
    line_offset, nodes)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/fast.py", line 435, in _get_node
p = Parser(self._grammar, parser_code, self.module_path, tokenizer=tokenizer)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/__init__.py", line 155, in __init__
    self.module = p.parse(self._tokenize(tokenizer))
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/pgen2/parse.py", line 106, in parse
    if self.addtoken(type, value, prefix, start_pos):
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/pgen2/parse.py", line 170, in addtoken
    value, start_pos, prefix, self.addtoken)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/__init__.py", line 269, in error_recovery
    self._stack_removal(grammar, stack, index + 1, value, start_pos)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/__init__.py", line 304, in _stack_removal
    clear_names(children=node[1])
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/__init__.py", line 294, in clear_names
    clear_names(c.children)
  File "/Users/rakan/.vim/bundle/jedi-vim/jedi/jedi/parser/__init__.py", line 298, in clear_names
    self._scope_names_stack[-1][c.value].remove(c)
KeyError: u'classmethod'

I am running the latest master currently at d3484afe20cf1a3c9fb20ba44d6e06a6feff8ee3 commit hash.

Please advise

[blueyed]

Looks like a Jedi issue. You could try updating Jedi (in the jedi submodule/folder) to the latest version.

A simple test case to reproduce this would help addressing / fixing it.

[davidhalter]

Yeah, please try updating Jedi (dev branch). And if it's still not working, please post the source.

[rakanalh]

I've updated to the latest dev branch but i have encountered the same issue.

I can't share the source code because it's a part of product my company is developing. However, it's a class that defines classmethods:

class SomeClass(object):
    @classmethod
    def do_something(cls, *args, **kwargs):
        passs

I tried a very simple example with a main file that class a class method that is defined in myclass.py

class MyClass(object):
    @classmethod
    def say_hello(cls):
        print 'Hello'

But could not regenerate the issue to be honest. g and d did actually do what's expected. I am not sure what makes the difference between smaller class and larger ones with classmethods in jedi.

[davidhalter]

It's a parser error. Without the source I cannot debug it. So if you don't post an example that doesn't work (you could delete code until it doesn't work anymore), I cannot fix it.

[davidhalter]

Fixed in Jedi's dev branch.