Description:

It crashes
*** glibc detected *** p2c: free(): invalid next size (fast): 0x090bbe70 ***
======= Backtrace: =========
/lib/libc.so.6(+0x6bed1)[0xb775ded1]
/lib/libc.so.6(+0x6d81b)[0xb775f81b]
/lib/libc.so.6(cfree+0x6d)[0xb77629bd]
/lib/libc.so.6(realloc+0x272)[0xb7762ca2]
p2c[0x8050c56]
p2c[0x8052d2d]
p2c[0x8053d8f]
p2c[0x8054e54]
p2c[0x8056d6e]
p2c[0x805fa24]
p2c[0x805cb9a]
p2c[0x8056819]
p2c[0x804d66c]
/lib/libc.so.6(__libc_start_main+0xe6)[0xb7708c66]
p2c[0x8048dc1]
======= Memory map: ========
08048000-080be000 r-xp 00000000 08:11 1178417 /usr/bin/p2c
080be000-080c1000 rw-p 00075000 08:11 1178417 /usr/bin/p2c
080c1000-080c7000 rw-p 00000000 00:00 0
090b6000-090d7000 rw-p 00000000 00:00 0 [heap]
b7500000-b7521000 rw-p 00000000 00:00 0
b7521000-b7600000 ---p 00000000 00:00 0
b76f1000-b76f2000 rw-p 00000000 00:00 0
b76f2000-b7837000 r-xp 00000000 08:11 1226672 /lib/libc-2.12.2.so
b7837000-b7838000 ---p 00145000 08:11 1226672 /lib/libc-2.12.2.so
b7838000-b783a000 r--p 00145000 08:11 1226672 /lib/libc-2.12.2.so
b783a000-b783b000 rw-p 00147000 08:11 1226672 /lib/libc-2.12.2.so
b783b000-b783e000 rw-p 00000000 00:00 0
b7852000-b786d000 r-xp 00000000 08:11 1471699 /usr/lib/libgcc_s.so.1
b786d000-b786e000 rw-p 0001a000 08:11 1471699 /usr/lib/libgcc_s.so.1
b786e000-b7872000 rw-p 00000000 00:00 0
b7872000-b7873000 r-xp 00000000 00:00 0 [vdso]
b7873000-b788f000 r-xp 00000000 08:11 1226664 /lib/ld-2.12.2.so
b788f000-b7890000 r--p 0001b000 08:11 1226664 /lib/ld-2.12.2.so
b7890000-b7891000 rw-p 0001c000 08:11 1226664 /lib/ld-2.12.2.so
bfb9f000-bfbc0000 rw-p 00000000 00:00 0 [stack]
Abandon

Steps to reproduce:
p2c -h traitdon.h -o traitdon.c traitdon.pas