C++ 我收到此错误：“检测到 glibc”

I get this error: "glibc detected"

提问by casablanca

I just wrote a piece of CPP code and I compiled it using G++ in ubuntu. When I run my code everything is fine, the code runs well and gives output but doesn't exit and it gives this error:

我刚刚写了一段CPP代码，我在ubuntu中使用G++编译了它。当我运行我的代码时一切正常，代码运行良好并提供输出但不退出并出现此错误：

 *** 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 this mean? How can i get rid of it? I'm not using malloc or free , I'm just using vector!

这是什么意思？我怎样才能摆脱它？我没有使用 malloc 或 free ，我只是在使用 vector ！

回答by casablanca

Even if you're not allocating memory directly, it happens under the hood in vectorcode and you most likely corrupted some portion of memory by writing where you are not supposed to. The most likely reasons I can think of are:

即使您不直接分配内存，它也会发生在vector代码的幕后，您很可能会通过在不应该的地方写入来破坏部分内存。我能想到的最可能的原因是：

1. Writing to an element that is out of bounds
2. Using a pointer/reference to an element that is no longer valid -- note that inserting more elements can invalidate earlier references

1. 写入越界的元素
2. 使用指向不再有效的元素的指针/引用——请注意，插入更多元素会使之前的引用无效

Of course, I can't say for sure unless you post some relevant code. Or try using valgrindto find the source of the problem.

当然，除非您发布一些相关代码，否则我不能肯定地说。或者尝试使用valgrind查找问题的根源。

回答by peoro

This means you called freeon a non valid pointer (ie: a pointer not allocated via malloc, or that you already freed).

这意味着您调用free了一个无效的指针（即：未通过 malloc 分配的指针，或者您已经释放的指针）。

Paste some code, else it's impossible to say why this happens.

粘贴一些代码，否则无法说明为什么会发生这种情况。