Comment 5 for bug 1672733

Finally got this segfault myself, with symbols enabled in wx...backtrace is bizarre.

(gdb) bt
#0 0x00007fc9adecef24 in wxGenericImageList::RemoveAll() (this=this@entry=0x69c3c00) at ./src/generic/imaglist.cpp:234
#1 0x00007fc9adecef67 in wxGenericImageList::~wxGenericImageList() (this=0x69c3c00, __in_chrg=<optimized out>) at ./src/generic/imaglist.cpp:40
#2 0x00007fc994a2f0cf in FP_LOADER_THREAD::ProcessEntry(FOOTPRINT_PREVIEW_PANEL::CACHE_ENTRY&) (this=0x86c6ca0, aEntry=...) at /home/cmp/git/kicad/pcbnew/footprint_preview_panel.cpp:181
#3 0x00007fc994a2f1df in FP_LOADER_THREAD::Entry() (this=0x86c6ca0) at /home/cmp/git/kicad/pcbnew/footprint_preview_panel.cpp:193
#4 0x00007fc9ad763492 in wxThread::CallEntry() (this=this@entry=0x86c6ca0) at ./include/wx/thrimpl.cpp:356
#5 0x00007fc9ad76c240 in wxThreadInternal::PthreadStart(wxThread*) (thread=0x86c6ca0) at ./src/unix/threadpsx.cpp:867
#6 0x00007fc9aa9842e7 in start_thread () at /usr/lib/libpthread.so.0
#7 0x00007fc9aa6c554f in clone () at /usr/lib/libc.so.6