I'm cooking a micro-web service using serverino. I have used gdb, but now I've set a breakpoint in a function which the serverino middleware should be invoking from a worker thread. I have a writeln() to verify the code's being invoked--but gdb will not break. I've verified a correct code address for the breakpoint.

Has anybody else noticed a problem with breakpoints for worker threads? Or should I be looking at something else?

(Note, I can break at _Dmain and see things OK, it's just once the middleware has taken over that I can't seem to look at the running code.)