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A possible reason for the issue - Your code crashes at the return statement, it might be the case that your function is overriding the return address in its call stack that happens if you try to provide the local variable with data larger than its buffer size.

The first time you see h() is returning some value, note it's value, comment out the calling of h() and then use that hardcoded value in g(). This will let you work past the calling of h().

Separately, you can write a test case to debug h() alone to find out the cause of the crash.

If the type of crash is detailed, it could shed a little more light on this problem. But the way i look at it, something within h() messed with the call-stack of g() because essentially the return from a void method is a pop from the call-stack. So i would look at what is the dependency between h() and g(), for instance, are there any pointers being passed, etc.

The return statement in h() call crash in the way g() calls h(). If it uses a pointer to call h and by mistaken return points to deleted address then program will crash. So it does not matter if h() is void then also error is resulted.

Maybe g is storing the variable into a variable ... making it give an error cuz you cant store the void returned by h into an int or char or other types.

This would not give a syntax error.

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