delegates/lambas do not pick up calling convention

[Timon Gehr via Digitalmars-d-learn]

On 10.08.2017 01:52, Johnson Jones wrote:
> given somethign like Threads.threadsAddIdle
> 
> which takes an extern(C) int (void*)
> 
> we can't seem to do
> 
> threadsAddIdle((void*) { }, null);

I think this is a compiler bug. Try:

threadsAddIdle((x){ }, null);

It seems that the calling convention is deduced only if the parameter 
type needs to be deduced too.

https://issues.dlang.org/show_bug.cgi?id=17739