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Running the encoder example causes a segfault in libvorbis-1.0 on SunOS 4.1.3.
The gdb back trace is as follows:

$ ./encoder_example < ~/audio.wav > ~/audio.ogg
Memory fault(coredump)
$ gdb encoder_example core
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GDB 4.15.1 (sparc-sun-sunos4.1.3_U1),
Copyright 1995 Free Software Foundation, Inc...
Core was generated by `encoder_example'.
Program terminated with signal 11, Segmentation fault.
#0  0x16ea8 in inspect_error (x0=16, x1=46, y0=653, y1=-1, mask=0x1a4808,
    mdct=0x1a4a08, info=0x11e790) at floor1.c:543
543       int base=dy/adx;
(gdb) bt
#0  0x16ea8 in inspect_error (x0=16, x1=46, y0=653, y1=-1, mask=0x1a4808,
    mdct=0x1a4a08, info=0x11e790) at floor1.c:543
#1  0x1740c in floor1_fit (vb=0xf7fff708, look=0x1a7a38, logmdct=0x1a4a08,
    logmask=0x1a4808) at floor1.c:667
#2  0x1af2c in mapping0_forward (vb=0xf7fff708) at mapping0.c:423
#3  0x7fd0 in vorbis_analysis (vb=0xf7fff708, op=0x0) at analysis.c:47
#4  0x2598 in main () at encoder_example.c:216
(gdb)

libogg and libvorbis are both compiled with gcc 2.95.2.  The compiler flags
are the default settings after running configure.