Student constructor for john Student constructor for billy Student destructor for john Student destructor for *** glibc detected *** ./a.out: double free or corruption (fasttop): 0x0000000000dbb010 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x7f68f35deb96] ./a.out[0x401132] ./a.out[0x400e72] ./a.out[0x400ecf] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7f68f358176d] ./a.out[0x400b19] ======= Memory map: ======== 00400000-00403000 r-xp 00000000 00:27 23341 /home/dit1948/data/Courses/Notes/CS170/Code/Classes3/a.out 00602000-00603000 r--p 00002000 00:27 23341 /home/dit1948/data/Courses/Notes/CS170/Code/Classes3/a.out 00603000-00604000 rw-p 00003000 00:27 23341 /home/dit1948/data/Courses/Notes/CS170/Code/Classes3/a.out 00dbb000-00ddc000 rw-p 00000000 00:00 0 [heap] 7f68f3264000-7f68f335f000 r-xp 00000000 08:31 136152 /lib/x86_64-linux-gnu/libm-2.15.so 7f68f335f000-7f68f355e000 ---p 000fb000 08:31 136152 /lib/x86_64-linux-gnu/libm-2.15.so 7f68f355e000-7f68f355f000 r--p 000fa000 08:31 136152 /lib/x86_64-linux-gnu/libm-2.15.so 7f68f355f000-7f68f3560000 rw-p 000fb000 08:31 136152 /lib/x86_64-linux-gnu/libm-2.15.so 7f68f3560000-7f68f3715000 r-xp 00000000 08:31 136144 /lib/x86_64-linux-gnu/libc-2.15.so 7f68f3715000-7f68f3914000 ---p 001b5000 08:31 136144 /lib/x86_64-linux-gnu/libc-2.15.so 7f68f3914000-7f68f3918000 r--p 001b4000 08:31 136144 /lib/x86_64-linux-gnu/libc-2.15.so 7f68f3918000-7f68f391a000 rw-p 001b8000 08:31 136144 /lib/x86_64-linux-gnu/libc-2.15.so 7f68f391a000-7f68f391f000 rw-p 00000000 00:00 0 7f68f391f000-7f68f3934000 r-xp 00000000 08:31 134983 /lib/x86_64-linux-gnu/libgcc_s.so.1 7f68f3934000-7f68f3b33000 ---p 00015000 08:31 134983 /lib/x86_64-linux-gnu/libgcc_s.so.1 7f68f3b33000-7f68f3b34000 r--p 00014000 08:31 134983 /lib/x86_64-linux-gnu/libgcc_s.so.1 7f68f3b34000-7f68f3b35000 rw-p 00015000 08:31 134983 /lib/x86_64-linux-gnu/libgcc_s.so.1 7f68f3b35000-7f68f3c17000 r-xp 00000000 08:31 2109334 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7f68f3c17000-7f68f3e16000 ---p 000e2000 08:31 2109334 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7f68f3e16000-7f68f3e1e000 r--p 000e1000 08:31 2109334 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7f68f3e1e000-7f68f3e20000 rw-p 000e9000 08:31 2109334 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7f68f3e20000-7f68f3e35000 rw-p 00000000 00:00 0 7f68f3e35000-7f68f3e57000 r-xp 00000000 08:31 136158 /lib/x86_64-linux-gnu/ld-2.15.so 7f68f4022000-7f68f4027000 rw-p 00000000 00:00 0 7f68f4053000-7f68f4057000 rw-p 00000000 00:00 0 7f68f4057000-7f68f4058000 r--p 00022000 08:31 136158 /lib/x86_64-linux-gnu/ld-2.15.so 7f68f4058000-7f68f405a000 rw-p 00023000 08:31 136158 /lib/x86_64-linux-gnu/ld-2.15.so 7fff79421000-7fff79442000 rw-p 00000000 00:00 0 [stack] 7fff79534000-7fff79535000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Aborted