堆损坏-调试断言失败.在dbgheap.c第1322行中的表达式_crtIsValidHeapPointer(pUserData) [英] Heap corruption - debug assertion failed. in dbgheap.c line 1322 expression _crtIsValidHeapPointer(pUserData)

问题描述

在运行时我得到调试断言失败.

At runtime I get debug assertion failed.

in dbgheap.c line 1322 expression _crtIsValidHeapPointer(pUserData)

如果我在调试器中运行，则会在下面所示的行中触发一个断点.

If I run in a debugger I get a breakpoint triggered in line shown below.

如何解决此分配/取消分配错误?

How can I fix this allocation/de-allocation error?

我在头文件中有2个函数:

I have 2 functions in a header file:

struct union_find_t;

struct union_find_t* union_find_init(int n);

void union_find_free(struct union_find_t* uf);

.在.c文件中，这两个功能的实现为:

and in the .c file the implementation for these 2 functions is:

typedef struct union_find_t { 
    int* parent;
    int* rank;
    int components;
} *union_find_t;


struct union_find_t* union_find_init(int n) {

    struct union_find_t* uf = malloc(sizeof(union_find_t));
    uf->parent = malloc(n * sizeof(int));
    uf->rank = malloc(n * sizeof(int));
    uf->components = n;
    for (int i = 0; i < n; ++i) {
         uf->parent[i] = i;
         uf->rank[i] = 0;
    }
    return uf;
}

void union_find_free(struct union_find_t* uf) {
     free(uf->parent);
     free(uf->rank);
     free(uf);  //*** breakpoint triggered here
}

推荐答案

此:

typedef struct union_find_t

是以下类型的定义:

*union_find_t;

因此，当您执行此操作时:

So when you do this:

malloc(sizeof(union_find_t));

您只需为指向该结构的指针分配空间，而不为您需要的结构分配空间！

you just allocate space for a pointer to that struct, not for a struct as you need to!

尝试:

malloc(sizeof(struct union_find_t));

相反.

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