core dump - drawTIFF

[mocha]

Core was generated by `php'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/libexec/ld.elf_so...done.
Reading symbols from /usr/pkg/lib/mysql/libmysqlclient.so.6...done.
Reading symbols from /usr/pkg/lib/libgdbm.so.1...done.
Reading symbols from /usr/lib/libm.so.0...done.
Reading symbols from /usr/lib/libcrypt.so.0...done.
Reading symbols from /usr/lib/libresolv.so.1...done.
Reading symbols from /usr/lib/libc.so.12...done.
Reading symbols from /usr/pkg/lib/php3/php_mapscript.so...done.
Reading symbols from /usr/pkg/lib/libttf.so.3...done.
Reading symbols from /usr/pkg/lib/libjpeg.so.62...done.
Reading symbols from /usr/lib/libz.so.0...done.
Reading symbols from /usr/pkg/lib/libtiff.so.3...done.
#0  0x1609770bc in drawTIFF (map=0x160f69970, layer=0xa6, img=0x1202ea000,
     filename=0x120312000 "") at mapraster.c:359
---Type <return> to continue, or q <return> to quit---
359               vv=buf[xi+boffset];