Return a dynamic array: bug or feature?

[Gilles G.]

Hello,
I went into trouble returning a dynamic array from a function. For example:
    import std.stdio;
    int[] testGood()
    {
        int a[]; a.length=2;
        a[]=1;
        return a;
    }
    
    int[] testBad()
    {
        int a[2];
        a[]=1;
        return a;
    }
    
    int main()
    {
        int b[];
        b = testGood();
        writef("Good test:\n");
        writef("  b[0]=%d,  b[1]=%d\n",b[0],b[1]);
        writef("  b[0]=%d,  b[1]=%d\n",b[0],b[1]);
        b = testBad();
        writef("Bad test:\n");
        writef("  b[0]=%d,  b[1]=%d\n",b[0],b[1]);
        writef("  b[0]=%d,  b[1]=%d\n",b[0],b[1]);
        return 0;
    }
This code outputs:
>Good test:
>  b[0]=1,  b[1]=1
>  b[0]=1,  b[1]=1
>Bad test:
>  b[0]=0,  b[1]=1
>  b[0]=0,  b[1]=1

I guess this is the good behavior since I should not return a static array from a function, but the compiler _should_ issue a warning here... or not?

--
Gilles