load / save bug with drones

[zymex22]

Describe the bug
When trying to load or save with active drones out it will throug a error for "each" ? drones thats out.
this might be caused by a mod imcompat not sure i attached modlist

To Reproduce
Reproducibility: should be always with showed modlist?
Steps to reproduce the behavior:

1. start a map, build some drone stations
2. get drones out and working
3. pause game and save. it will throw a error for each drone
4. reload and it thorw another error

Expected behavior
No spam?

Actual Behavior
Much spam

Screenshots

When saved:

https://gist.github.com/79b3fd442a4e11169be0b609b19a769f

When loaded

https://gist.github.com/035d944741d413df24b662fb1d88d09f

Rimworld (please complete the following information):

• RimWorld Version: 1.1 / 1.2
• PRF Version: all
• Link to gist bug report:
• Type:
• Severity:
• Regression:

Modlist (please complete the following information):

• Does this problem exist if only prf is installed:
• Your modlist (if needed):
• Do you know what mod conflicts?:

Additional context

[Sn1p3rr3c0n]

@zymex22 Work Tab is the Mod triggering this issue

[zymex22]

make sense =) is it a prf problem or a work tab problem?

[Sn1p3rr3c0n]

i think its a Work Tab Issue.
see: fluffy-mods/WorkTab#134

[zymex22]

so can we patch/fix it for us or something we should leave..
not sure if it causing any problems but its quiet annoying see when looking for other problems :P

if we should not or can not fix it we can close this i guess =)

[Sn1p3rr3c0n]

the issue seems to be that Work Tab Saves Drone Pawn by reference that do no longer exist.

in my test scenario i use one Drone station with 30 drones active.
Work Tab saves 69 Drone Pawns. consequently 39 unique warnings and 39 null ref errors are logged.

I will check if we are doing something wrong with the despawning but otherwise i think its a Work Tab bug

[Sn1p3rr3c0n]

Work Tab dose not save Pawns if they have the Destroyed flag set.
Therefor by simply setting this bool to true the issue can be resolved.