Exact effects of returning Structs

[Era Scarecrow]

  I have some experimental code I'm writing, and it seems when i return a 
structure it is either corrupted, or should be disallowed all together. A 
postblit is suggested this(this), but since I'm returning a structure that 
isn't tied to anything else it doesn't need to duplicate it.

Example:

struct A{
int b;
char c[];
}

void fun1() {
  A a;
  a = fun2();
//array a.c corrupted, causes range exception
//int a.b corrupted?!?
}

A fun2(){
  A t;
  t.c.length = 100;
/*do something*/
  return t;  //valid before returning.
}