AttributeError: 'NoneType' object has no attribute 'endswith'

Getting this traceback:

Traceback (most recent call last):

  File "/Applications/Sublime Text.app/Contents/MacOS/sublime_plugin.py", line 377, in on_query_completions

res = callback.on_query_completions(v, prefix, locations)

  File "TSCompletion in /Users/rc/Library/Application Support/Sublime Text 3/Installed Packages/TypescriptCompletion.sublime-package", line 50, in on_query_completions

  File "TSCompletion in /Users/rc/Library/Application Support/Sublime Text 3/Installed Packages/TypescriptCompletion.sublime-package", line 258, in TSC_IsTypeScript
AttributeError: 'NoneType' object has no attribute 'ends with'

On line 48, is this statement:

current_file = view.file_name()

file_name() returns None and the call to the TSC_IsTypeScript(current_file) (line 50) tries to see if the filename ends with ".ts". I have an untitled file that I'm working on, so I suppose None is a valid state for the file_name to be in. As soon as I save it, it no longer has this error, this definitely an edge case.

Start at the on_query_completions callback and trace its current_file value into TSC_IsTypeScript, using the reported lines 48 and 50 as entry points. Reproduce the problem in an untitled Sublime Text buffer, then verify that completion produces no traceback there while saved TypeScript files continue to work.