ID 329542 - Nuke Studio crashes when saving an autosaved opened project

Problem summary
Nuke Studio crashes when saving an autosaved opened project.

This is link to timeline disk caching, as when timeline disk caching is disable via an environment variable, Nuke does not crash

Customer reported version
nuke.11.1v1

Customer reported platform

Centos 6.9

Steps to reproduce

1) Open terminal and set NUKE_TEMP_DIR to an empty directory

2) Open NukeStudio 11.1v1 from the same terminal

3) Set the autosave timer for NukeStudio to 3 seconds, in Edit>Preferences...>General>force project autosave after

4) Import footage and add it to the timeline

5) Save the .horx project

5) Disk Cache the sequence by selecting the timeline, then Cache>Disk Cache>Cache Sequence Range

6) Add a soft effect to the clip, by right clicking the clip>Effects>Mirror

7) In the Mirror options, enable vertical (flip)

8) Wait a few seconds

9) Close Nuke without saving

10) Open Nuke from the same terminal session

11) In the open the .horx project

12) When it says "Restore autosave file?", press Yes

13) Save the script as a new version, with File>Save Project As, then give it a new name

14) Press Save, Nuke will crash

Reproduced by support

This problem has been reproduced on:
Nuke 11.1v1 - CentOS 6.9 - Windows 10
Nuke 11.0v3 - CentOS 6.9 
Nuke 11.0v1 - CentOS 6.9

This problem has not been reproduced on:
Nuke 11.1v1 - MacOSX 10.13 
Nuke 11.0v3 - MacOSX 10.13 - Windows 10
Nuke 11.0v1 - MacOSX 10.13 - Windows 10

Earliest version tested

Nuke 11.0v1 - This feature was not implemented before this

Expected behaviour
Nuke not to crash

Actual behaviour
It crashed