I still cannot reproduce the crash. Since there are still issues with
missing internal lane ids, please send all your scenario input files just
to make sure we're using the same inputs.

Am Mo., 15. März 2021 um 14:07 Uhr schrieb Marcelo Andrade Rodrigues D
Almeida <[email protected]>:

> Hi everyone
>
> As I suspected, traci did not flush the remaining commands when it went
> fatal
>
> I could reproduce the problem by saving the RL actions (i.e., signal
> changing commands).
> I then used my script to reproduce the actual traci commands and stop
> right before the Fatal error step.
> At the end, I manually added the simulationStep() that leads to the fatal
> error.
>
>
> Sincerely,
>
> Marcelo d'Almeida
>
> On Tue, Mar 9, 2021 at 9:23 AM Marcelo Andrade Rodrigues D Almeida <
> [email protected]> wrote:
>
>> Yeah, I ended reading the file and doing eval on the lines.
>>
>>
>> "The next thing would be to test whether you can reproduce any crashing
>> with your own traceFile."
>>
>> I already tested this (on my local machine, but it should not make any
>> difference) and I couldn't reproduce either. I also tried to run further
>> simulationStep() commands before closing the simulation, once the error
>> occurs in the step. No luck.
>>
>> I was wondering if there were any possibility of traci not registering
>> the last commands.
>> Is the command registered before or after calling it? If it is after,
>> that should explain why simulationStep() is not the last command in the
>> file! But what about other commands? Are they guaranteed to flush to the
>> file in a fatal crash?
>>
>>
>> "Also, you have some subscriptions to non-existing lanes in your script
>> which I removed manually."
>>
>> That's strange, I retrieve the lanes from the network file. I'll take a
>> look. Thanks
>>
>>
>> "These are a bit strange: either you are catching the TraCIException in
>> your own code or the network file you are using is different from mine"
>>
>> Hmm, the only thing I did differently is that the scenario was crashing
>> when loading, so I opened all the files (e.g., network and additionals) in
>> the netedit and re-saved them. The errors stopped. I'm using the 'joined'
>> scenario
>>
>>
>> About valgrind:
>> Well, I temporarily lost access to the remote machine. I have to retry it
>> when I regain access.
>>
>>
>> On Tue, Mar 9, 2021 at 4:38 AM Jakob Erdmann <[email protected]>
>> wrote:
>>
>>> Hello,
>>>
>>> I ran your traceFile provided on friday and also
>>> no_rerouting_threads_no_multiprocess_trace_file_log.txt from saturday but
>>> was unable to reproduce the crash.
>>> To rerun the trace file all you have to do is add
>>> 'import traci' and any lines needed to make this import work and then
>>> treat it as a python script.
>>> For me this was:
>>> import os,sys
>>> sys.path.append('/scr1/sumo/tools')
>>> import traci
>>>
>>> (and traci.close() at the end for a clean exit)
>>> Also, you have some subscriptions to non-existing lanes in your script
>>> which I removed manually.
>>> These are a bit strange: either you are catching the TraCIException in
>>> your own code or the network file you are using is different from mine.
>>> (I used the unaltered download of
>>> https://sourceforge.net/projects/sumo/files/traffic_data/scenarios/Bologna_small/Bologna_small-0.29.0.zip/download
>>> )
>>>
>>>
>>> The next thing would be to test whether you can reproduce any crashing
>>> with your own traceFile.
>>>
>>> regards,
>>> Jakob
>>>
>>> Am Sa., 6. März 2021 um 22:05 Uhr schrieb Harald Schaefer <
>>> [email protected]>:
>>>
>>>> valgrind is good in memory checking, but the price is long execution
>>>> times.
>>>>
>>>> You ask for a capture and replay feature in traci, this should be
>>>> answered by the SUMO developers
>>>>
>>>>
>>>> Am 06.03.21 um 16:00 schrieb Marcelo Andrade Rodrigues D Almeida:
>>>>
>>>> Hi Harald
>>>>
>>>> Unfortunately, it is extremely slow. 36 minutes for the first 210
>>>> steps. I only added output file parameter
>>>>
>>>> How can I provide a trace file to Sumo so I can re-run the exact
>>>> simulation that failed?
>>>>
>>>>
>>>> Thank you in advance
>>>>
>>>> On Sat, Mar 6, 2021 at 10:46 AM Harald Schaefer <[email protected]>
>>>> wrote:
>>>>
>>>>> Hi Marcelo,
>>>>>
>>>>> try something like
>>>>>
>>>>>     traci.start(['/bin/valgrind', sumoBinary, "-c", "junction.sumocfg",
>>>>>                              "--tripinfo-output", "tripinfo.xml"])
>>>>>
>>>>> Between valgrind and sumoBinary you can insert valgrind options
>>>>>
>>>>> It takes 4 or 5 iterations until trai connects with sumo due to the
>>>>> start overhead of valgrind
>>>>>
>>>>> Regards, Harald
>>>>> Am 06.03.21 um 12:36 schrieb Marcelo Andrade Rodrigues D Almeida:
>>>>>
>>>>> Also, how can I run valgrind and traci.start at the same time? Without
>>>>> traci, my script won't interact with the simulation and no error will 
>>>>> occur
>>>>>
>>>>> On Sat, Mar 6, 2021 at 8:15 AM Marcelo Andrade Rodrigues D Almeida <
>>>>> [email protected]> wrote:
>>>>>
>>>>>> All other executions reported the same error
>>>>>>
>>>>>> See their trace file attached
>>>>>>
>>>>>>
>>>>>> Hi Harald
>>>>>>
>>>>>> Soo, no success in reproducing the error via trace file?
>>>>>>
>>>>>>
>>>>>> Sincerely,
>>>>>>
>>>>>> Marcelo d'Almeida
>>>>>>
>>>>>>
>>>>>> On Sat, Mar 6, 2021 at 3:59 AM Harald Schaefer <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Marcelo,
>>>>>>>
>>>>>>> there is a tool valgrind under Linux, which records all memory
>>>>>>> allocations. It uses many resources (time and memory), but traces all
>>>>>>> memory allocations and uses. It pin points to situations, where memory 
>>>>>>> is
>>>>>>> allocated, which is later freed and used again.
>>>>>>>
>>>>>>> A simple call is
>>>>>>>
>>>>>>>     valgrind sumo-git-co/sumo/bin/sumoD debug.sumo.cfg
>>>>>>>
>>>>>>> It works best with the debug version.
>>>>>>>
>>>>>>> Regards, Harald
>>>>>>> Am 05.03.21 um 19:21 schrieb Marcelo Andrade Rodrigues D Almeida:
>>>>>>>
>>>>>>> One of the tests finished
>>>>>>>
>>>>>>> NO_REROUTING_THREADS (see attached trace file)
>>>>>>>
>>>>>>> Reading symbols from ../../sumo-git/bin/sumo...(no debugging symbols
>>>>>>> found)...done.
>>>>>>> [New LWP 3412]
>>>>>>> [Thread debugging using libthread_db enabled]
>>>>>>> Using host libthread_db library
>>>>>>> "/lib/x86_64-linux-gnu/libthread_db.so.1".
>>>>>>> Core was generated by `sumo-git/bin/sumo -n
>>>>>>> /app/scenario/experimental/Bologna_small-0.29.0/joined/joi'.
>>>>>>> Program terminated with signal SIGSEGV, Segmentation fault.
>>>>>>> #0  0x000055a5cea65826 in MSVehicle::getBoundingBox() const ()
>>>>>>> (gdb) bt
>>>>>>> #0  0x000055a5cea65826 in MSVehicle::getBoundingBox() const ()
>>>>>>> #1  0x000055a5ceae2e61 in MSLane::detectCollisions(long long,
>>>>>>> std::__cxx11::basic_string<char, std::char_traits<char>,
>>>>>>> std::allocator<char> > const&) ()
>>>>>>> #2  0x000055a5ceac13f4 in MSEdgeControl::detectCollisions(long long,
>>>>>>> std::__cxx11::basic_string<char, std::char_traits<char>,
>>>>>>> std::allocator<char> > const&) ()
>>>>>>> #3  0x000055a5cea1c944 in MSNet::simulationStep() ()
>>>>>>> #4  0x000055a5cea1cb56 in MSNet::simulate(long long, long long) ()
>>>>>>> #5  0x000055a5cea045ad in main ()
>>>>>>>
>>>>>>>
>>>>>>> Still waiting on NO_MULTIPROCESS and
>>>>>>> NO_REROUTING_THREADS_NO_MULTIPROCESS
>>>>>>>
>>>>>>>
>>>>>>> Sincerely,
>>>>>>>
>>>>>>> Marcelo d'Almeida
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Mar 5, 2021 at 11:03 AM Marcelo Andrade Rodrigues D Almeida <
>>>>>>> [email protected]> wrote:
>>>>>>>
>>>>>>>> It seems great!
>>>>>>>>
>>>>>>>> Thank you!!
>>>>>>>>
>>>>>>>> On Fri, Mar 5, 2021 at 9:48 AM Jakob Erdmann <[email protected]>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> I think we're getting closer and closer to make tracing work in
>>>>>>>>> your use case: https://github.com/eclipse/sumo/issues/8323
>>>>>>>>>
>>>>>>>>> Am Fr., 5. März 2021 um 12:34 Uhr schrieb Marcelo Andrade
>>>>>>>>> Rodrigues D Almeida <[email protected]>:
>>>>>>>>>
>>>>>>>>>> For instance, all but "traci.close()" and
>>>>>>>>>> "traci.simulationStep()" are duplicated in the second run
>>>>>>>>>>
>>>>>>>>>> On Fri, Mar 5, 2021 at 8:27 AM Marcelo Andrade Rodrigues D
>>>>>>>>>> Almeida <[email protected]> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi Jakob
>>>>>>>>>>>
>>>>>>>>>>> Both "trace_file_label.txt" and "trace_file_new_label.txt"
>>>>>>>>>>> should have the same information since they execute the same code
>>>>>>>>>>>
>>>>>>>>>>> Currently (in the updated version), they don't.
>>>>>>>>>>>
>>>>>>>>>>> Something else might be interfering in the trace file generation
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Sincerely,
>>>>>>>>>>>
>>>>>>>>>>> Marcelo d'Almeida
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Thu, Mar 4, 2021 at 6:34 PM Marcelo Andrade Rodrigues D
>>>>>>>>>>> Almeida <[email protected]> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Thank you
>>>>>>>>>>>>
>>>>>>>>>>>> Tomorrow I'll start new tests with the new development version
>>>>>>>>>>>> to debug the original issue
>>>>>>>>>>>>
>>>>>>>>>>>> On Thu, Mar 4, 2021, 6:06 PM Jakob Erdmann <
>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for the example. The problem was due to
>>>>>>>>>>>>> https://github.com/eclipse/sumo/issues/8320
>>>>>>>>>>>>>
>>>>>>>>>>>>> Am Do., 4. März 2021 um 20:16 Uhr schrieb Marcelo Andrade
>>>>>>>>>>>>> Rodrigues D Almeida <[email protected]>:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> I could reproduce the trace file problem
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> See attached files
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Thu, Mar 4, 2021 at 3:29 PM Marcelo Andrade Rodrigues D
>>>>>>>>>>>>>> Almeida <[email protected]> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Just to clarify
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The attached file is one of the finished tests from the last
>>>>>>>>>>>>>>> batch (traceGetters False)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> But both (this one and the previously traceGetters True)
>>>>>>>>>>>>>>> were presenting zero simulation step entries in the trace files.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Thu, Mar 4, 2021 at 3:21 PM Marcelo Andrade Rodrigues D
>>>>>>>>>>>>>>> Almeida <[email protected]> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> I'm redoing the tests with traceGetters set to False to
>>>>>>>>>>>>>>>> reduce the (huge) file size. Also, I had to restart the tests 
>>>>>>>>>>>>>>>> because
>>>>>>>>>>>>>>>> someone or something turned off the remote machine overnight.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> What I could find so far:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> I could retrieve a trace file in the remote server (the
>>>>>>>>>>>>>>>> huge one) and I found something very odd.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> In my trivial test, I found a regular trace file
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> "traci.start(['/home/marcelo/code/sumo/bin/sumo-gui', '-n',
>>>>>>>>>>>>>>>> '/home/marcelo/temp2/temp/temp/temp/regular-intersection__right_on_red.net.xml',
>>>>>>>>>>>>>>>> '-r', 
>>>>>>>>>>>>>>>> '/home/marcelo/temp2/temp/temp/temp/regular-intersection.rou.xml',
>>>>>>>>>>>>>>>> '--start', 'True'], port=None, label='default')
>>>>>>>>>>>>>>>> traci.trafficlight.setPhase('gneJ0', 0)
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.trafficlight.setPhase('gneJ0', 0)
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.simulationStep()
>>>>>>>>>>>>>>>> traci.trafficlight.setPhase('gneJ0', 0)
>>>>>>>>>>>>>>>> "
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> In my actual experiment (with multi_processing set to
>>>>>>>>>>>>>>>> False), all 'traci.simulationStep()' commands are gone (see 
>>>>>>>>>>>>>>>> file attached
>>>>>>>>>>>>>>>> for complete trace):
>>>>>>>>>>>>>>>> "
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('231',
>>>>>>>>>>>>>>>> 'rrrrGGggrrrGGGgyyyyrrrrGGGGggrrrrrrrrrrrrGGg')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('231',
>>>>>>>>>>>>>>>> 'rrrrGGggrrryyyyyyyyrrrrGGGGggrrrrrrrrrrrrGGg')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('233',
>>>>>>>>>>>>>>>> 'rryyyyrrrryy')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('282',
>>>>>>>>>>>>>>>> 'rrryyyrrryyy')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('221',
>>>>>>>>>>>>>>>> 'yyyrrrryyyyyyyrrrrryyy')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('220',
>>>>>>>>>>>>>>>> 'GGGrrrrryyyrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('209', 'ryrGGrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('210',
>>>>>>>>>>>>>>>> 'rrrGGGGGrrrrrrrryyyy')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('273',
>>>>>>>>>>>>>>>> 'yyyrrrryy')
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Prati_Capraia_100_70', [66, 64,
>>>>>>>>>>>>>>>> 122, 86, 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Borgo_20_56', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Malvasia_100_70', [66, 64, 122,
>>>>>>>>>>>>>>>> 86, 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Pertini_20_159', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Costa_700_126', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Pepoli_10_199', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Gandhi_40_219', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Audinot_3_16', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Pepoli_10_200', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.vehicle.subscribe('Silvani_7_145', [66, 64, 122, 86,
>>>>>>>>>>>>>>>> 183, 76, 72, 68, 81, 71, 77, 67, 181])
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('231',
>>>>>>>>>>>>>>>> 'rrrrGGggrrryyyyrrrrGGrrGGGGggrrrrrrrrrrrrGGg')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('231',
>>>>>>>>>>>>>>>> 'rrrrGGggrrrrrrrrrrrGGrrGGGGggrrrrrrrrrrrrGGg')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('282',
>>>>>>>>>>>>>>>> 'GGgrrrGGgrrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('220',
>>>>>>>>>>>>>>>> 'GGGrrrrGrrrrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('209', 'GrGGGrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('210',
>>>>>>>>>>>>>>>> 'rrrGGGGGrrrrrrGGrrrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('273',
>>>>>>>>>>>>>>>> 'rrrGGGGrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('233',
>>>>>>>>>>>>>>>> 'GGrrrrGGGgrr')
>>>>>>>>>>>>>>>> traci.trafficlight.setRedYellowGreenState('221',
>>>>>>>>>>>>>>>> 'rrrGGGGrrrrrrrGGGGGrrr')
>>>>>>>>>>>>>>>> "
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> This was the reported crash from this execution:
>>>>>>>>>>>>>>>> #0  0x000055d660c7cf86 in MSVehicle::getBoundingBox() const
>>>>>>>>>>>>>>>> ()
>>>>>>>>>>>>>>>> #1  0x000055d660cfa5b1 in MSLane::detectCollisions(long
>>>>>>>>>>>>>>>> long, std::__cxx11::basic_string<char, std::char_traits<char>,
>>>>>>>>>>>>>>>> std::allocator<char> > const&) ()
>>>>>>>>>>>>>>>> #2  0x000055d660cd8b54 in
>>>>>>>>>>>>>>>> MSEdgeControl::detectCollisions(long long, 
>>>>>>>>>>>>>>>> std::__cxx11::basic_string<char,
>>>>>>>>>>>>>>>> std::char_traits<char>, std::allocator<char> > const&) ()
>>>>>>>>>>>>>>>> #3  0x000055d660c34294 in MSNet::simulationStep() ()
>>>>>>>>>>>>>>>> #4  0x000055d660c344a6 in MSNet::simulate(long long, long
>>>>>>>>>>>>>>>> long) ()
>>>>>>>>>>>>>>>> #5  0x000055d660c1c37d in main ()
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> What I could find about the trace file generation problem
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The problem is that (without multi-processing) traci is
>>>>>>>>>>>>>>>> discarding the first run trace file info and keeping traces 
>>>>>>>>>>>>>>>> for the
>>>>>>>>>>>>>>>> following runs.
>>>>>>>>>>>>>>>> When running with multi-processing, all traci simulations
>>>>>>>>>>>>>>>> are handled as first-run (i.e., new processes) and everything 
>>>>>>>>>>>>>>>> is thrown
>>>>>>>>>>>>>>>> away.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> It doesn't matter if it is a regular or a debug build
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> I'm don't know why the first run is discarded. I'll keep
>>>>>>>>>>>>>>>> looking
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Any new information, I post here
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Wed, Mar 3, 2021 at 10:08 AM Jakob Erdmann <
>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> 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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>>>>>>>>>>>>>>>>> [email protected]
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>>>>>>>>>>>>>>>>>
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