Hi,

I'm trying to make some additions to DMD.

First I want to add a virtual function:

virtual void emitLink(OutBuffer *buf)

to the struct Type.

I did that. Then on doc.c I implement it empty:

void Type::emitLink(OutBuffer *buf) { }

Then I use it somewhere, like in AliasDeclaration::toDocBuffer:

type->emitLink(buf);

I compile it, it's fine. When I run DMD with the -D switch I get:

Bus error: 10

I thought maybe the type is null, so:

if (type) type->emitLink(buf);

But no luck.

I tried to copy the prototype of:

virtual TypeBasic *isTypeBasic()

without luck.

What am I doing wrong?

Thanks,
Ary

On 02.04.2012 18:27, Ary Manzana wrote:
> Hi,
>
> I'm trying to make some additions to DMD.
>
> First I want to add a virtual function:
>
> virtual void emitLink(OutBuffer *buf)
>
> to the struct Type.
>
> I did that. Then on doc.c I implement it empty:
>
> void Type::emitLink(OutBuffer *buf) { }
>
> Then I use it somewhere, like in AliasDeclaration::toDocBuffer:
>
> type->emitLink(buf);
>
> I compile it, it's fine. When I run DMD with the -D switch I get:
>
> Bus error: 10

Looks like a link-time breakage, i.e. some object file compiled against an older version of header/src and consequently older v-table.
Maybe the dmd makefile is faulty and doesn't trigger proper rebuilds, do a 'make clean' to be sure.




-- 
Dmitry Olshansky

On 4/3/12 4:01 AM, Dmitry Olshansky wrote:
> On 02.04.2012 18:27, Ary Manzana wrote:
>> Hi,
>>
>> I'm trying to make some additions to DMD.
>>
>> First I want to add a virtual function:
>>
>> virtual void emitLink(OutBuffer *buf)
>>
>> to the struct Type.
>>
>> I did that. Then on doc.c I implement it empty:
>>
>> void Type::emitLink(OutBuffer *buf) { }
>>
>> Then I use it somewhere, like in AliasDeclaration::toDocBuffer:
>>
>> type->emitLink(buf);
>>
>> I compile it, it's fine. When I run DMD with the -D switch I get:
>>
>> Bus error: 10
>
> Looks like a link-time breakage, i.e. some object file compiled against
> an older version of header/src and consequently older v-table.
> Maybe the dmd makefile is faulty and doesn't trigger proper rebuilds, do
> a 'make clean' to be sure.
>
>
>
>

Yes, that was it. Thanks!