delegates/lambas do not pick up calling convention

[Adam D. Ruppe via Digitalmars-d-learn]

On Wednesday, 9 August 2017 at 23:52:00 UTC, Johnson Jones wrote:
> extern(C) delegate(void*) {}

You should very rarely use extern(C) delegate... delegate is a D 
type, so the C function is almost certainly not actually 
receiving it.

Only time you'd want an extern(C) using D types like delegates, 
arrays, strings, etc., is if the receiver is actually also 
written in D.

idk if this would fix your problem, but it should be changed 
regardless.