Program received signal SIGSEGV, Segmentation fault.
0xa7e32def in malloc_usable_size () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt
#0  0xa7e32def in malloc_usable_size () from /lib/tls/i686/cmov/libc.so.6
#1  0xa7e34dd8 in free () from /lib/tls/i686/cmov/libc.so.6
#2  0xa7e36a6f in malloc () from /lib/tls/i686/cmov/libc.so.6
#3  0xa7e581c8 in opendir () from /lib/tls/i686/cmov/libc.so.6
#4  0x0806855c in wopendir (name=0x809da50) at wutil.c:297
#5  0x0805a9ff in highlight_shell (buff=0x8098f08, color=0x80987d8, pos=15, error=0x0) at highlight.c:159
#6  0x080621c8 in reader_super_highlight_me_plenty (buff=0x8098f08, color=0x80987d8, pos=1, error=0x0) at reader.c:2276
#7  0x08063720 in insert_char (c=108) at reader.c:1154
#8  0x0806485d in reader_readline () at reader.c:2895
#9  0x0806553d in reader_read (fd=0) at reader.c:2340
#10 0x080740c1 in main (argc=1, argv=0xafe05f14) at main.c:303