Internal error from DMD

Bradley Smith digitalmars-com at
Sat Jun 24 00:59:35 PDT 2006

I didn't mean to be overly critical of the compiler. I wasn't sure how 
to interpret the "Internal error" message, and I just wanted to confirm 
that the objective was to not have any internal errors.

What is the proper procedure for reporting a bug?

Thanks for the pointer about Box and Object. I'm still learning how D 
handles data.


Jarrett Billingsley wrote:
> "Bradley Smith" <digitalmars-com at> wrote in message 
> news:e7hvil$1ffi$1 at
>> Is this a bug? Should the DMD compiler ever give an internal error?
> Considering it's in alpha, the compiler is allowed to have some slack ;) 
> But no, it's not _supposed_ to have internal errors.  Any internal error is 
> a bug.
>> import std.stdio;
>> import std.boxer;
>> void main() {
>> Object[] l;
>> l ~= cast(Object) box(1);
> You can't cast a box to Object; box is a struct, not a class.  If you want 
> an array of boxes, hava a look at boxArray().
>> int a = unbox!(int)(cast(Box) l[0]);
>> writefln("value %d", a);
>> }
>>> dmd tmp.d c:\dmd\src\phobos\std\boxer.d
>> tmp.d(6): e2ir: cannot cast from Box to object.Object
>> tmp.d(7): e2ir: cannot cast from object.Object to Box
>> Internal error: e2ir.c 267 

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