bug: map has no len()

[mgaitan]

trying to render a table with in st3 beta I got a TypeError

Traceback (most recent call last):
  File "/opt/sublime_text/sublime_plugin.py", line 549, in run_
    return self.run(edit)
  File "rst_tables in /home/mgaitan/.config/sublime-text-3/Installed Packages/Restructured Text (RST) Snippets.sublime-package", line 72, in run
  File "rst_tables in /home/mgaitan/.config/sublime-text-3/Installed Packages/Restructured Text (RST) Snippets.sublime-package", line 249, in parse_table
  File "rst_tables in /home/mgaitan/.config/sublime-text-3/Installed Packages/Restructured Text (RST) Snippets.sublime-package", line 209, in unify_table
  File "rst_tables in /home/mgaitan/.config/sublime-text-3/Installed Packages/Restructured Text (RST) Snippets.sublime-package", line 209, in <lambda>
TypeError: object of type 'map' has no len()