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List:       flightgear-devel
Subject:    [Flightgear-devel] Seg fault bisected to 1bafe15c4cc5 ("Adding highlighting system.")
From:       James Hogan <james () albanarts ! com>
Date:       2021-10-08 21:44:16
Message-ID: CAAG0J99xhReG2aj33RaEbjJg0UthBa8kV+tsvDGA0WK1Fndb=Q () mail ! gmail ! com
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Hi,

Recently I'm experiencing a segmentation fault soon after starting.
I've bisected to commit 1bafe15c4cc5a05509ee06b50cfe123f6f36ef54
("Added highlighting system.") in flightgear.

Anybody else see that or is it just me? Here's the backtrace:

Thread 1 "fgfs" received signal SIGSEGV, Segmentation fault.
0x00007ffff6d598ec in pthread_rwlock_rdlock () from /usr/lib/libpthread.so.0
(gdb) bt
#0  0x00007ffff6d598ec in pthread_rwlock_rdlock () from /usr/lib/libpthread.so.0
#1  0x0000000100f2b4e2 in std::__glibcxx_rwlock_rdlock (__rwlock=0x10)
at /usr/include/c++/11.1.0/shared_mutex:78
#2  std::__shared_mutex_pthread::lock_shared (this=<optimized out>) at
/usr/include/c++/11.1.0/shared_mutex:229
#3  std::shared_mutex::lock_shared (this=<optimized out>) at
/usr/include/c++/11.1.0/shared_mutex:426
#4  SGPropertyLock::acquire_internal (this=this@entry=0x7fffffffc8c0,
node=..., shared=shared@entry=true) at
/home/james/src/flightgear/fgmeta/simgear/simgear/props/props.cxx:329
#5  0x0000000100f2bc05 in SGPropertyLockShared::acquire
(this=0x7fffffffc8c0) at
/home/james/src/flightgear/fgmeta/simgear/simgear/props/props.cxx:466
#6  SGPropertyLockShared::assign (node=..., this=0x7fffffffc8c0) at
/home/james/src/flightgear/fgmeta/simgear/simgear/props/props.cxx:459
#7  SGPropertyLockShared::SGPropertyLockShared (this=0x7fffffffc8c0,
node=...) at /home/james/src/flightgear/fgmeta/simgear/simgear/props/props.cxx:450
#8  0x0000000100f260d8 in SGPropertyNode::getBoolValue (this=0x0) at
/home/james/src/flightgear/fgmeta/simgear/simgear/props/props.cxx:2861
#9  0x00000001005b6f11 in Highlight::highlight_nodes
(this=this@entry=0x10641b770, node=0x7fff8508e2d0) at
/home/james/src/flightgear/fgmeta/flightgear/src/GUI/Highlight.cxx:416
#10 0x0000000100b4c7bb in FGRenderer::pick (this=<optimized out>,
windowPos=...) at
/home/james/src/flightgear/fgmeta/flightgear/src/Viewer/renderer.cxx:1014
#11 0x00000001005dac4f in
FGMouseInput::FGMouseInputPrivate::doHoverPick
(this=this@entry=0x106633c60, windowPos=...) at
/home/james/src/flightgear/fgmeta/flightgear/src/Input/FGMouseInput.cxx:231
#12 0x00000001005d5d6f in FGMouseInput::update (this=0x11dc200f0,
dt=0.033333333333333333) at
/home/james/src/flightgear/fgmeta/flightgear/src/Input/FGMouseInput.cxx:507
#13 0x0000000100f7555a in SGSubsystemGroup::Member::update
(this=0x1067afd70, delta_time_sec=<optimized out>) at
/home/james/src/flightgear/fgmeta/simgear/simgear/structure/subsystem_mgr.cxx:848
#14 0x0000000100f79e17 in SGSubsystemGroup::update (this=0x104303630,
delta_time_sec=0.033333333333333333) at
/home/james/src/flightgear/fgmeta/simgear/simgear/structure/subsystem_mgr.cxx:434
#15 0x0000000100f7555a in SGSubsystemGroup::Member::update
(this=0x1067aff40, delta_time_sec=<optimized out>) at
/home/james/src/flightgear/fgmeta/simgear/simgear/structure/subsystem_mgr.cxx:848
#16 0x0000000100f79e17 in SGSubsystemGroup::update (this=0x102e02180,
delta_time_sec=0.033333333333333333) at
/home/james/src/flightgear/fgmeta/simgear/simgear/structure/subsystem_mgr.cxx:434
#17 0x0000000100f70c1a in SGSubsystemMgr::update (this=0x102e01ef0,
delta_time_sec=0.033333333333333333) at
/home/james/src/flightgear/fgmeta/simgear/simgear/structure/subsystem_mgr.cxx:1002
#18 0x0000000100be1f9f in fgMainLoop () at
/home/james/src/flightgear/fgmeta/flightgear/src/Main/main.cxx:165
#19 0x0000000100b33cd2 in fgOSMainLoop () at
/home/james/src/flightgear/fgmeta/flightgear/src/Viewer/fg_os_osgviewer.cxx:370
#20 0x0000000100be6c6f in fgMainInit (argc=<optimized out>,
argv=0x7fffffffe3d8) at
/home/james/src/flightgear/fgmeta/flightgear/src/Main/main.cxx:817
#21 0x000000010036457e in main (argc=4, argv=0x7fffffffe3d8) at
/home/james/src/flightgear/fgmeta/flightgear/src/Main/bootstrap.cxx:331

Thanks
-- 
James Hogan


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