Memory Fault when changing output

[danyspin97]

This is the backtrace:

#0  0x00007ffff7f6c03f in malloc () at /lib/ld-musl-x86_64.so.1
#1  0x0000555555b981c0 in  ()
#2  0xfffffffffffffffe in  ()
#3  0x0000000000000040 in  ()
#4  0x0000000100000001 in  ()
#5  0x0000555555aafdb0 in  ()
#6  0x00007ffff599d8b0 in  ()
#7  0x00007ffff599d920 in  ()
#8  0x0000000000000030 in  ()
#9  0x00007ffff599d920 in  ()
#10 0x00007ffff599d9e0 in  ()
#11 0x00007ffff599d9e0 in  ()
#12 0x00007ffff599dab0 in  ()
#13 0x00007ffff599d920 in  ()
#14 0x00007ffff68fb565 in operator new(unsigned long) () at /usr/x86_64-pc-linux-musl/lib/libstdc++.so.6
#15 0x00007ffff7eb08f9 in Json::Value::Value(Json::ValueType) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#16 0x00007ffff7eabab9 in Json::OurReader::readObject(Json::OurReader::Token&) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#17 0x00007ffff7eab733 in Json::OurReader::readValue() () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#18 0x00007ffff7eabcd0 in Json::OurReader::readObject(Json::OurReader::Token&) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#19 0x00007ffff7eab733 in Json::OurReader::readValue() () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#20 0x00007ffff7eab1f5 in Json::OurReader::readArray(Json::OurReader::Token&) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#21 0x00007ffff7eab76b in Json::OurReader::readValue() () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#22 0x00007ffff7eac4c0 in Json::OurReader::parse(char const*, char const*, Json::Value&, bool) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#23 0x00007ffff7eaeb9c in Json::OurCharReader::parse(char const*, char const*, Json::Value*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) () at /usr/x86_64-pc-linux-musl/lib/libjsoncpp.so.21
#24 0x00005555555ecdca in waybar::util::JsonParser::parse(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const (this=0x55555589fca8, data=Traceback (most recent call last): at ../include/util/json.hpp:17
#25 0x000055555562d86e in waybar::modules::sway::Workspaces::onCmd(waybar::modules::sway::Ipc::ipc_response const&) (this=0x55555589fb60, res=...) at ../src/modules/sway/workspaces.cpp:41
#26 0x0000555555634cd6 in sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&>::operator()(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x555555a9ff98, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/functors/mem_fun.h:2066
#27 0x0000555555634c46 in sigc::adaptor_functor<sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&> >::operator()<waybar::modules::sway::Ipc::ipc_response const&>(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x555555a9ff90, _A_arg1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:89
#28 0x0000555555634c0e in sigc::internal::slot_call<sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&>, void, waybar::modules::sway::Ipc::ipc_response const&>::call_it(sigc::internal::slot_rep*, waybar::modules::sway::Ipc::ipc_response const&) (rep=0x555555a9ff60, a_=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/functors/slot.h:450
#29 0x000055555562625f in sigc::internal::signal_emit1<void, waybar::modules::sway::Ipc::ipc_response const&, sigc::nil>::emit(sigc::internal::signal_impl*, waybar::modules::sway::Ipc::ipc_response const&) (impl=0x555555a27b60, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/signal.h:1041
#30 0x00005555556260a1 in sigc::signal1<void, waybar::modules::sway::Ipc::ipc_response const&, sigc::nil>::emit(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x55555589fdb0, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/signal.h:2951
#31 0x0000555555625e11 in waybar::modules::sway::Ipc::sendCmd(unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (this=0x55555589fda0, type=1, payload=Traceback (most recent call last): at ../src/modules/sway/ipc/client.cpp:130
#32 0x000055555562d71c in waybar::modules::sway::Workspaces::onEvent(waybar::modules::sway::Ipc::ipc_response const&) (this=0x55555589fb60, res=...) at ../src/modules/sway/workspaces.cpp:30
#33 0x0000555555634cd6 in sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&>::operator()(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x555555b40798, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/functors/mem_fun.h:2066
#34 0x0000555555634c46 in sigc::adaptor_functor<sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&> >::operator()<waybar::modules::sway::Ipc::ipc_response const&>(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x555555b40790, _A_arg1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:89
#35 0x0000555555634c0e in sigc::internal::slot_call<sigc::bound_mem_functor1<void, waybar::modules::sway::Workspaces, waybar::modules::sway::Ipc::ipc_response const&>, void, waybar::modules::sway::Ipc::ipc_response const&>::call_it(sigc::internal::slot_rep*, waybar::modules::sway::Ipc::ipc_response const&) (rep=0x555555b40760, a_=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/functors/slot.h:450
#36 0x000055555562625f in sigc::internal::signal_emit1<void, waybar::modules::sway::Ipc::ipc_response const&, sigc::nil>::emit(sigc::internal::signal_impl*, waybar::modules::sway::Ipc::ipc_response const&) (impl=0x5555559d83a0, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/signal.h:1041
#37 0x00005555556260a1 in sigc::signal1<void, waybar::modules::sway::Ipc::ipc_response const&, sigc::nil>::emit(waybar::modules::sway::Ipc::ipc_response const&) const (this=0x55555589fda0, _A_a1=...) at /usr/x86_64-pc-linux-musl/include/sigc++-2.0/sigc++/signal.h:2951
#38 0x0000555555625f77 in waybar::modules::sway::Ipc::handleEvent() (this=0x55555589fda0) at ../src/modules/sway/ipc/client.cpp:142
#39 0x00005555556322b1 in waybar::modules::sway::Workspaces::worker()::$_3::operator()() const (this=0x555555bd6dd0) at ../src/modules/sway/workspaces.cpp:105
#40 0x000055555563216d in std::_Function_handler<void (), waybar::modules::sway::Workspaces::worker()::$_3>::_M_invoke(std::_Any_data const&) (__functor=...) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/bits/std_function.h:300
#41 0x000055555559e57e in std::function<void ()>::operator()() const (this=0x555555bd6dd0) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/bits/std_function.h:690
#42 0x000055555559e534 in waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}::operator()() const (this=0x555555bd6dc8) at ../include/util/sleeper_thread.hpp:27
#43 0x000055555559e4dd in std::__invoke_impl<void, waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}>(std::__invoke_other, waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}&&) (__f=...) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/bits/invoke.h:60
#44 0x000055555559e46d in std::__invoke<waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}>(std::__invoke_result&&, (waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}&&)...) (__fn=...) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/bits/invoke.h:95
#45 0x000055555559e445 in std::thread::_Invoker<std::tuple<waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}> >::_M_invoke<0ul>(std::_Index_tuple<0ul>) (this=0x555555bd6dc8) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/thread:244
#46 0x000055555559e415 in std::thread::_Invoker<std::tuple<waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}> >::operator()() (this=0x555555bd6dc8) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/thread:251
#47 0x000055555559e0be in std::thread::_State_impl<std::thread::_Invoker<std::tuple<waybar::util::SleeperThread::operator=(std::function<void ()>)::{lambda()#1}> > >::_M_run() (this=0x555555bd6dc0) at /usr/bin/../lib64/gcc/x86_64-pc-linux-musl/9.2.0/../../../../include/c++/9.2.0/thread:195
#48 0x00007ffff692e670 in execute_native_thread_routine () at /usr/x86_64-pc-linux-musl/lib/libstdc++.so.6
#49 0x00007ffff7fb5cb5 in start () at /lib/ld-musl-x86_64.so.1
#50 0x00007ffff599eb20 in  ()
#51 0x0000000000000000 in  ()

It happens very often but not every time. I have taken the string that makes waybar crash and manually feeded it to jsoncpp parser, expecting the same behaviour; however, this worked without fault.

[Alexays]

Might be fixed with #441

[danyspin97]

It still crashes during the screen changes but I get a different error. More on #441

[Alexays]

Ping, can you retest with latest changes?

[danyspin97]

I have retested using master branch but I am still experiencing the segmentation fault.

[Alexays]

@danyspin97 your latest issue should be fixed with 6e7f22a
Can you confirm?

[danyspin97]

I have tried switching screen a couple of times and it works. Many thanks for fixing this issue!