Surface dust restored from session not saved in session

[goddard@…]

The following bug report has been submitted:
Platform:        Darwin-19.4.0-x86_64-i386-64bit
ChimeraX Version: 1.0rc202005292300 (2020-05-29 23:00:06 UTC)
Description
Saving and restoring a session with surface dust correctly restores the dust removal.  But saving it again after opening the previous session and restoring that second session does not restore the dust.  Apparently the session restore is not setting up the saving of the dust updater.

Log:
UCSF ChimeraX version: 1.0rc202005292300 (2020-05-29)  
© 2016-2020 Regents of the University of California. All rights reserved.  

> open test.cxs

Log from Thu Jun 4 18:55:12 2020UCSF ChimeraX version: 1.0rc202005292300
(2020-05-29)  
© 2016-2020 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open 1a0m fromDatabase eds

Opened 1a0m.ccp4, grid size 97,101,88, pixel 0.37,0.37,0.367, shown at level
2.28, step 1, values float32  

> surface dust #1 size 1

> save test.cxs

opened ChimeraX session  

> volume #1 level 1.662




OpenGL version: 4.1 ATI-3.8.24
OpenGL renderer: AMD Radeon Pro Vega 20 OpenGL Engine
OpenGL vendor: ATI Technologies Inc.Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro15,3
      Processor Name: 8-Core Intel Core i9
      Processor Speed: 2.4 GHz
      Number of Processors: 1
      Total Number of Cores: 8
      L2 Cache (per Core): 256 KB
      L3 Cache: 16 MB
      Hyper-Threading Technology: Enabled
      Memory: 32 GB
      Boot ROM Version: 1037.100.362.0.0 (iBridge: 17.16.14281.0.0,0)

Software:

    System Software Overview:

      System Version: macOS 10.15.4 (19E287)
      Kernel Version: Darwin 19.4.0
      Time since boot: 26 days 22:34

Graphics/Displays:

    Intel UHD Graphics 630:

      Chipset Model: Intel UHD Graphics 630
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x3e9b
      Revision ID: 0x0002
      Automatic Graphics Switching: Supported
      gMux Version: 5.0.0
      Metal: Supported, feature set macOS GPUFamily2 v1

    Radeon Pro Vega 20:

      Chipset Model: Radeon Pro Vega 20
      Type: GPU
      Bus: PCIe
      PCIe Lane Width: x8
      VRAM (Total): 4 GB
      Vendor: AMD (0x1002)
      Device ID: 0x69af
      Revision ID: 0x00c0
      ROM Revision: 113-D2060I-087
      VBIOS Version: 113-D20601MA0T-016
      Option ROM Version: 113-D20601MA0T-016
      EFI Driver Version: 01.01.087
      Automatic Graphics Switching: Supported
      gMux Version: 5.0.0
      Metal: Supported, feature set macOS GPUFamily2 v1
      Displays:
        Color LCD:
          Display Type: Built-In Retina LCD
          Resolution: 2880 x 1800 Retina
          Framebuffer Depth: 24-Bit Color (ARGB8888)
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: No
          Connection Type: Internal

PyQt version: 5.12.3
Compiled Qt version: 5.12.4
Runtime Qt version: 5.12.8

[Tom Goddard]

Fixed.

There were two bugs. When a session with hide dust was restored it did not set it to save in sessions. Also the general session restore code when restoring state managers whose attributes have a leading underscore (_surface_updaters in this case) did not set those to save in sessions.

[Tom Goddard]

Fixed in ChimeraX 1.1, not in 1.0.