gistfile1.txt

An error occured. This is either a bug in UltiSnips or a bug in a
snippet definition. If you think this is a bug, please report it to
https://github.com/SirVer/ultisnips/issues/new.

Following is the full stack trace:
Traceback (most recent call last):
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/err_to_scratch_buffer.py", line 16, in wrapper
    return func(self, *args, **kwds)
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/snippet_manager.py", line 138, in expand_or_jump
    rv = self._try_expand()
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/snippet_manager.py", line 718, in _try_expand
    self._do_snippet(snippet, before)
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/snippet_manager.py", line 689, in _do_snippet
    self._jump()
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/snippet_manager.py", line 480, in _jump
    _vim.select(ntab.start, ntab.end)
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/_vim.py", line 166, in select
    _unmap_select_mode_mapping()
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/_vim.py", line 245, in _unmap_select_mode_mapping
    all_maps = list(filter(len, eval(r"_tmp_smaps").splitlines()))
  File "/home/mg/.vim/bundle/UltiSnips/pythonx/UltiSnips/_vim.py", line 121, in eval
    rv = vim.eval(as_vimencoding(text))
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc0 in position 2647: invalid start byte