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I get this error: "glibc detected"

I just wrote a piece of CPP code, and I compiled it with g ++ in ubuntu. When I run my code, everything is fine, the code works well and gives a result, but does not exit, and it gives this error:

 *** glibc detected *** ./a.out: free (): invalid next size (fast): 0x09f931f0 ***
======= Backtrace: ==========
/lib/libc.so.6(+0x6c501)[0x3de501]
/lib/libc.so.6(+0x6dd70)[0x3dfd70]
/lib/libc.so.6(cfree+0x6d)[0x3e2e5d]
/usr/lib/libstdc++.so.6(_ZdlPv+0x21)►0x6e2441]
./a.out[0x8049ce6]
/lib/libc.so.6(+0x2f69e)[0x3a169e]
/lib/libc.so.6(+0x2f70f)[0x3a170f]
/lib/libc.so.6(__libc_start_main+0xef)[0x388cef]
./a.out[0x8048a61]
======= Memory map: =========
00219000-0021a000 r-xp 00000000 00:00 0 [vdso]
00354000-00370000 r-xp 00000000 08:01 8781845 /lib/ld-2.12.1.so
00370000-00371000 r - p 0001b000 08:01 8781845 /lib/ld-2.12.1.so
00371000-00372000 rw-p 0001c000 08:01 8781845 /lib/ld-2.12.1.so
00372000-004c9000 r-xp 00000000 08:01 8781869 /lib/libc-2.12.1.so
004c9000-004ca000 --- p 00157000 08:01 8781869 /lib/libc-2.12.1.so
004ca000-004cc000 r - p 00157000 08:01 8781869 /lib/libc-2.12.1.so
004cc000-004cd000 rw-p 00159000 08:01 8781869 /lib/libc-2.12.1.so
004cd000-004d0000 rw-p 00000000 00:00 0 
00638000-00717000 r-xp 00000000 08:01 3935829 /usr/lib/libstdc++.so.6.0.14
00717000-0071b000 r - p 000de000 08:01 3935829 /usr/lib/libstdc++.so.6.0.14
0071b000-0071c000 rw-p 000e2000 08:01 3935829 /usr/lib/libstdc++.so.6.0.14
0071c000-00723000 rw-p 00000000 00:00 0 
00909000-0092d000 r-xp 00000000 08:01 8781918 /lib/libm-2.12.1.so
0092d000-0092e000 r - p 00023000 08:01 8781918 /lib/libm-2.12.1.so
0092e000-0092f000 rw-p 00024000 08:01 8781918 /lib/libm-2.12.1.so
00fdb000-00ff5000 r-xp 00000000 08:01 8781903 /lib/libgcc_s.so.1
00ff5000-00ff6000 r - p 00019000 08:01 8781903 /lib/libgcc_s.so.1
00ff6000-00ff7000 rw-p 0001a000 08:01 8781903 /lib/libgcc_s.so.1
08048000-0804b000 r-xp 00000000 08:01 8652645 /home/akg/Desktop/contest/a.out
0804b000-0804c000 r - p 00002000 08:01 8652645 /home/akg/Desktop/contest/a.out
0804c000-0804d000 rw-p 00003000 08:01 8652645 /home/akg/Desktop/contest/a.out
09f93000-09fb4000 rw-p 00000000 00:00 0 [heap]
b7600000-b7621000 rw-p 00000000 00:00 0 
b7621000-b7700000 --- p 00000000 00:00 0 
b7765000-b7768000 rw-p 00000000 00:00 0 
b7775000-b7779000 rw-p 00000000 00:00 0 
bf9a7000-bf9c8000 rw-p 00000000 00:00 0 [stack]
Aborted

What does it mean? How can I get rid of it? I do not use malloc or for free, I just use a vector!

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2 answers

Even if you do not allocate memory directly, this happens under the hood in the code vector, and you most likely messed up some of the memory by writing where you shouldn't. The most likely reasons I can think of are:

  • Writing to an item that goes beyond
  • / , - ,

, , - . valgrind, .

+14

, free (.. , malloc ).

, , .

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