Segfaults when trying to save a simulation that uses AdExGroup

[sanjayankur31]

Hiya,

I was running some simulations with AdEx that use the system's save_network_state method and keep running into segfaults. This is the backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000455022 in NeuronGroup::virtual_serialize (this=0x6a3590, ar=..., version=<optimized out>) at /home/asinha/Documents/02_Code/00_repos/00_mine/herts-research-repo/auryn/src/NeuronGroup.cpp:351
351                     ar & *(post_state_traces[i]);
(gdb) bt
#0  0x0000000000455022 in NeuronGroup::virtual_serialize (this=0x6a3590, ar=..., version=<optimized out>) at /home/asinha/Documents/02_Code/00_repos/00_mine/herts-research-repo/auryn/src/NeuronGroup.cpp:351
#1  0x000000000043ab8f in serialize<boost::archive::binary_oarchive> (version=<optimized out>, ar=..., this=0x6a3590) at /home/asinha/Documents/02_Code/00_repos/00_mine/herts-research-repo/auryn/src/SpikingGroup.h:58
#2  serialize<boost::archive::binary_oarchive, SpikingGroup> (file_version=<optimized out>, t=..., ar=...) at /usr/include/boost/serialization/access.hpp:118
#3  serialize<boost::archive::binary_oarchive, SpikingGroup> (file_version=<optimized out>, t=..., ar=...) at /usr/include/boost/serialization/serialization.hpp:69
#4  serialize_adl<boost::archive::binary_oarchive, SpikingGroup> (file_version=<optimized out>, t=..., ar=...) at /usr/include/boost/serialization/serialization.hpp:128
#5  boost::archive::detail::oserializer<boost::archive::binary_oarchive, SpikingGroup>::save_object_data (this=<optimized out>, ar=..., x=0x6a3590) at /usr/include/boost/archive/detail/oserializer.hpp:148
#6  0x00007ffff771e1db in boost::archive::detail::basic_oarchive_impl::save_object (this=0x756770, ar=..., t=0x6a3590, bos=...) at libs/serialization/src/basic_oarchive.cpp:292
#7  0x0000000000433436 in invoke<SpikingGroup> (t=..., ar=...) at /usr/include/boost/archive/detail/oserializer.hpp:253
#8  invoke<SpikingGroup> (t=..., ar=...) at /usr/include/boost/archive/detail/oserializer.hpp:308
#9  save<boost::archive::binary_oarchive, SpikingGroup const> (t=..., ar=...) at /usr/include/boost/archive/detail/oserializer.hpp:525
#10 save_override<SpikingGroup const> (t=..., this=0x7fffffffc630) at /usr/include/boost/archive/detail/common_oarchive.hpp:69
#11 save_override<SpikingGroup> (version=0, t=..., this=0x7fffffffc630) at /usr/include/boost/archive/basic_binary_oarchive.hpp:81
#12 save_override<SpikingGroup> (t=..., this=0x7fffffffc630) at /usr/include/boost/archive/binary_oarchive_impl.hpp:63
#13 operator<< <SpikingGroup> (t=..., this=0x7fffffffc630) at /usr/include/boost/archive/detail/interface_oarchive.hpp:63
#14 System::save_network_state (this=0x6a2ad0, basename="0000-stable-netsave") at /home/asinha/Documents/02_Code/00_repos/00_mine/herts-research-repo/auryn/src/System.cpp:546
#15 0x0000000000412694 in main (ac=3, av=0x7fffffffddb8) at vogels.cpp:447

The same simulation using TIFGroup does not give me a segfault. I've checked my simulation code and don't think there's an error there. I compared the sources of the TIF and AdEx groups and noticed that the AdEx group doesn't override the "virtual_serialize" methods - could this be the reason? (I'm looking at the boost docs now, but I haven't used this part before.)

[fzenke]

Hi! D'oh it seems some code from one of my feature branches has leaked into the development branch without being finished. This part of the code was still buggy. I am currently compiling the library. Should be able to commit a hotfix within the hour. Have to go now and make coffee, bye! F

[sanjayankur31]

Hiya! It turned out to be PEBKAC. I had a stray libauryn.a file somewhere and it was linking against it instead of the latest build. Sorry for the noise. Closing. :(

[fzenke]

Alright. Still seems as if you were compiling code from the develop branch. I cherry-picked some commits there which should resolve that issue.

[sanjayankur31]

I am compiling against the develop branch nowadays, yeah. I just pulled your changes and they do fix the issue. Thanks! :)