Comment 2 for bug 1669069

Thread 3 "lrzip" received signal SIGILL, Illegal instruction.
[Switching to Thread 0x3fffb312f180 (LWP 130922)]
0x00003fffb7f70000 in ?? ()
(gdb) bt
#0 0x00003fffb7f70000 in ?? ()
#1 0x00000000100363f8 in libzpaq::Predictor::predict (this=0x3fffb3113430) at libzpaq/libzpaq.cpp:3140
#2 0x000000001003792c in libzpaq::Encoder::compress (this=0x3fffb3113420, c=<optimized out>)
    at libzpaq/libzpaq.cpp:1409
#3 0x0000000010037c9c in libzpaq::Compressor::postProcess (this=0x3fffb3113360, pcomp=0x0, len=<optimized out>)
    at libzpaq/libzpaq.cpp:1548
#4 0x000000001003826c in libzpaq::compress (in=0x3fffb312e508, out=0x3fffb312e4f0, level=<optimized out>)
    at libzpaq/libzpaq.cpp:1597
#5 0x0000000010038424 in zpaq_compress (c_buf=0x3fffac0008c0 "zPQ\001\001E", c_len=0x3fffb312e708,
    s_buf=0x100a3270 "", s_len=<optimized out>, level=<optimized out>, msgout=<optimized out>,
    progress=<optimized out>, thread=<optimized out>) at libzpaq/libzpaq.h:526
#6 0x0000000010014a98 in zpaq_compress_buf (thread=<optimized out>, cthread=0x10092a68,
    control=0x10070c50 <local_control>) at stream.c:184
#7 compthread (data=0x0) at stream.c:1296
#8 0x00003fffb7e58070 in start_thread (arg=0x3fffb312f180) at pthread_create.c:335
#9 0x00003fffb7a73230 in clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:96