Hi Harald,
the loop with the AnyVehicleIterator should never yield nullptrs. Hence the
real bug is someplace else.
The 4 worker threads in the stacktrace are due to
--device.rerouting.threads', '4', which doesn't really help to explain this
(parallel routing typically doesn't cause premature vehicle deletion).
Had the threads come from option --threads, that would have been a likely
cause of the issue since we have far fewer tests for this.

neverthless @marcello: Please try running without option
--device.rerouting.threads and see if you can still trigger the crash.

Either way, I will probably need a traci-traceFile to fix this.

regards,
Jakob

Am Mi., 3. März 2021 um 13:55 Uhr schrieb Harald Schaefer <
[email protected]>:

> Hi Marcelo, hi Jakob,
>
> thanks for the backtraces (looks good)
>
> The problem in this scenario is that MSVehicle::getBoundingBox (this=0x0)
> is called with a null-Object from this loop:
>
>         for (AnyVehicleIterator veh = anyVehiclesBegin(); veh !=
> anyVehiclesEnd(); ++veh) {
>             MSVehicle* collider = const_cast<MSVehicle*>(*veh);
>             //std::cout << "   collider " << collider->getID() << "\n";
>             PositionVector colliderBoundary = collider->getBoundingBox();
>
> Thread 1 (Thread 0x7fb4974cd780 (LWP 12544)):
> #0  0x0000561970425dcc in MSVehicle::getBoundingBox (this=0x0) at
> /app/sumo-git/src/microsim/MSVehicle.cpp:5925
> #1  0x00005619704c23f5 in MSLane::detectCollisions (this=0x561972d88020,
> timestep=947000, stage="move") at /app/sumo-git/src/microsim/MSLane.cpp:1358
> Regards, Harald
>
>
>
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