C-运行时错误，`malloc（sizeof（int））`导致程序崩溃

Question

Here is a piece of code:

int* linenump;
// ... other stuff
printf("----\n");
linenump = malloc(sizeof(int));
printf("*****\n");

The program only print out ---- then stopped, pop up a window says that the program has stopped, I paste the code in VS then build&run it, no errors, the program works fine.

It's a console application.

So, what I want to know is, in what situation that this will happen? and how should I solve it?

Thanks in advance.

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EDIT:
here is the full source code: urldown

Answer 1

You probably have some heap corruption somewhere earlier in the program but this is not showing up until this point. Run your code under valgrind to identify the real problem.