When running lu_factorize() on a 10x10 matrix, I get the following message and have no clue of the reason why (googling or searching this ML didn't help).

*** glibc detected *** ./a.out: free(): invalid next size (normal): 0x0806b8a0 ***
======= Backtrace: =========
/lib/i686/cmov/libc.so.6[0xb7d068f5]
/lib/i686/cmov/libc.so.6(cfree+0x90)[0xb7d0a360]
/usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xb7ed4171]
./a.out[0x805d28d]
./a.out[0x8058969]
./a.out[0x8051bcd]
./a.out[0x8057481]
./a.out[0x8057632]
./a.out(__gxx_personality_v0+0x317)[0x804adf7]
/lib/i686/cmov/libc.so.6(__libc_start_main+0xe0)[0xb7cb1450]
./a.out(__gxx_personality_v0+0xb1)[0x804ab91]
======= Memory map: ========