0xb3ddee76 in user_read p_png 0xa102cd8 data 0xb2d45838 LJ i_length at

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#0 0xb3ddee76 in user_read (p_png=0xa102cd8, data=0xb2d45838 "LJ", i_length=4) at /usr/include/bits/string3.h:52
52 return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
(gdb) bt
#0 0xb3ddee76 in user_read (p_png=0xa102cd8, data=0xb2d45838 "LJ", i_length=4) at /usr/include/bits/string3.h:52
#1 0xb407dde2 in ?? () from /usr/lib/libpng12.so.0
#2 0x0a102cd8 in ?? ()
#3 0xb2d45838 in ?? ()
#4 0x00000004 in ?? ()
#5 0xfffffffc in ?? ()
#6 0x0a10ec10 in ?? ()
#7 0xb408eff4 in ?? () from /usr/lib/libpng12.so.0
#8 0xb2d45858 in ?? ()
#9 0xb4072aba in ?? () from /usr/lib/libpng12.so.0
#10 0x0a102cd8 in ?? ()
#11 0xb2d45838 in ?? ()
#12 0x00000004 in ?? ()
#13 0xb4073e51 in ?? () from /usr/lib/libpng12.so.0
#14 0x0a100102 in ?? ()
#15 0xb07eb420 in ?? ()
#16 0x00004a4c in ?? ()
#17 0x2b286bc0 in ?? ()
#18 0xb07eb420 in ?? ()
#19 0x0a11bf59 in ?? ()
#20 0x0000a24c in ?? ()
#21 0xb408eff4 in ?? () from /usr/lib/libpng12.so.0
#22 0x0a102cd8 in ?? ()
#23 0x00002000 in ?? ()
#24 0xb2d45898 in ?? ()
#25 0xb4073d35 in ?? () from /usr/lib/libpng12.so.0
#26 0x0a102cd8 in ?? ()
#27 0x0a155735 in ?? ()
#28 0x0000a248 in ?? ()
#29 0x0a102cd8 in ?? ()
#30 0x000000ff in ?? ()
#31 0x0a102cd8 in ?? ()
#32 0x00004a4c in ?? ()
#33 0x2b286bc0 in ?? ()
#34 0x0a155730 in ?? ()
#35 0x0a11bf58 in ?? ()
#36 0x0000a266 in ?? ()
#37 0xb408eff4 in ?? () from /usr/lib/libpng12.so.0
#38 0xb408b4a5 in ?? () from /usr/lib/libpng12.so.0
#39 0x00004a4c in ?? ()
#40 0xb2d458f8 in ?? ()
#41 0xb407c41f in png_read_row () from /usr/lib/libpng12.so.0
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
Current language: auto; currently minimal
(gdb)