module t;
extern(C) int printf(char*,...);
void fff(void delegate(char[]) d, cfloat x){
printf("%p %p\n".ptr,d.funcptr,d.ptr);
}
int main(char[][] argv){
cfloat x;
auto d=delegate void(char[]) { };
printf("%p %p\n".ptr,d.funcptr,d.ptr);
fff(d,x);
return 0;
}
will print garbage in fff. The simple fact of passing in x pollutes the first argument.
This is probably be related with Bug 5570, and the work done in it, as it is a 64 bit only issue.
D2 does not seem to have the issue.