File→Open: unhashable type: 'set'

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Darwin-17.5.0-x86_64-i386-64bit
ChimeraX Version: 0.91 (2019-09-17)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 0.91 (2019-09-17)  
© 2016-2019 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  
Session data  
Command script  
Command script  
Command script  
Generic 3D objects  
Generic 3D objects  
Generic 3D objects  
Generic 3D objects  
Generic 3D objects  
Generic 3D objects  
Generic 3D objects  
Molecular trajectory  
Molecular trajectory  
Molecular trajectory  
Molecular structure  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Sequence alignment  
Generic 3D objects  
Molecular structure  
Molecular structure  
Documentation  
Volume data  
Molecule structure  
Molecule structure  
Higher-Order Structure  
Generic 3D objects  
Generic 3D objects  
set()  
Traceback (most recent call last):  
File
"/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/gui.py", line 862, in <lambda>  
open_action.triggered.connect(lambda arg, s=self, sess=session:
s.file_open_cb(sess))  
File
"/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/gui.py", line 571, in file_open_cb  
self.show_file_open_dialog(session)  
File
"/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/gui.py", line 579, in show_file_open_dialog  
filters = open_file_filter(all=True, format_name=format_name)  
File
"/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/open_save.py", line 138, in open_file_filter  
exts = combine.setdefault(fmt.category, [])  
TypeError: unhashable type: 'set'  
  
TypeError: unhashable type: 'set'  
  
File
"/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/open_save.py", line 138, in open_file_filter  
exts = combine.setdefault(fmt.category, [])  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 ATI-1.66.31
OpenGL renderer: AMD Radeon R9 M290X OpenGL Engine
OpenGL vendor: ATI Technologies Inc.