[Hybrid Setup] strange freeze after certain amount of objects in system

I keep getting a freeze in my Jobs based collision system,
I've found that it has to do with an iteration of two NativeMultiHashMap inside a monobehavior (not inside a job),
which I have to iterate over outside of a job to pop events to the gameObjects.

i've ruled out the function inside the iterations, even with no methods inside the freeze will occur.
is it not safe to iterate outside of a job on these types of maps?

for anyone who is curious, here is the code and the iteration that causes the freeze:

iteration: https://pastebin.com/ea38ed5J
entire system:
https://pastebin.com/BR8RMhXu

is there anyway I can debug this freeze?

 

Firstly, why would you do this?

[NativeDisableParallelForRestriction] public NativeMultiHashMap<int, int> onEnterCollisions;

Instead of using the AsParallel version?
You could just be corrupting the hash map by doing parallel writes.

 

first of all
NICE CATCH

secondly,
i'm not entirely sure why I used the attribute here,
I think in some other case I had to use it for some bit array or something (still kinda new to this haha..)
is the parallelWriter sufficient for this?

 

I didn't look through for a second error, so I don't know alone if this will fix it but I know corrupted native hash map can cause infinite loops.

 

OK,
I have two findings:
1. when I set the hashmaps to parallel writer,
I have no crash, so first of all
THANK YOU.

2. if I don't use the attribute,
the whole system doesn't work (IE the functionality doesn't happen).
for now I kept the attribute but with setting them to pw it works now.

now I have questions about this attribute...