cannot save session with STL model

[Elaine Meng]

I'd opened an STL file (also had a couple atomic models open) and tried to save session. Gives traceback:

save ~/Desktop/cartoons-axes.cxs
Traceback (most recent call last):
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/cmd_line/gui.py", line 195, in execute
cmd.run(cmd_text)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/commands/cli.py", line 2189, in run
results.append(ci.function(session, kw_args))
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/commands/save.py", line 102, in save
save_func(session, filename, kw)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 525, in save
session.save(output)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 414, in save
mgr.discovery(self._state_containers)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 197, in discovery
self.processed[key] = self.process(obj)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 219, in process
return copy_state(data, convert=self._add_obj)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 154, in copy_state
return _copy(data)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 141, in _copy
items = [(_copy(k), _copy(v)) for k, v in data.items()]
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 141, in <listcomp>
items = [(_copy(k), _copy(v)) for k, v in data.items()]
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 141, in _copy
items = [(_copy(k), _copy(v)) for k, v in data.items()]
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 141, in <listcomp>
items = [(_copy(k), _copy(v)) for k, v in data.items()]
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/state.py", line 152, in _copy
return convert(data)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 203, in _add_obj
uid = _UniqueName.from_obj(obj)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/session.py", line 93, in from_obj
obj_cls.module, obj_cls.name))
RuntimeError: No tool information for chimerax.stl.stl.STLModel

[Tom Goddard]

Fixed.

STL model session save required some special voodoo to work when moved from core to a separate tool.