#0  ref (this=<optimized out>) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
No locals.
#1  QList (this=0x7f9e4da81818 <QPrinterInfoPrivate::shared_null+24>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:121
No locals.
#2  QPrinterInfoPrivate (name=..., this=0x7f9e4da81800 <QPrinterInfoPrivate::shared_null>) at painting/qprinterinfo_p.h:71
No locals.
#3  __static_initialization_and_destruction_0 (__initialize_p=1, __priority=65535) at painting/qprinterinfo.cpp:35
No locals.
#4  _GLOBAL__sub_I_qprinterinfo.cpp(void) () at painting/qprinterinfo.cpp:163
No locals.
#5  0x00007f9e8311f5ba in ?? ()
No symbol table info available.
#6  0x0000000000000002 in ?? ()
No symbol table info available.
#7  0x0000000000000001 in ?? ()
No symbol table info available.
#8  0x00007ffd1750f0c8 in ?? ()
No symbol table info available.
#9  0x000000000123de40 in ?? ()
No symbol table info available.
#10 0x00000000017ab030 in ?? ()
No symbol table info available.
#11 0x00007f9e8311f6cb in ?? ()
No symbol table info available.
#12 0x0000000001205cc0 in ?? ()
No symbol table info available.
#13 0x0000000000000000 in ?? ()
No symbol table info available.