...COMDATs due to the default /OPT:REF. optlink is more aggressive and works the other...

Ignore this, Logger is a class and the error is to be expected. Will retry...

Reduced:

import std.experimental.logger : Logger;

void main()
{
    Logger logger;
    logger.error();
}

$ dub run
Performing...

IRCParser.init.client.server.chantypes.

Again, thank you for your immense help!

This is weird, chantypes should refer to a...

The debugger exposes a crash in memchr from C runtime.

In file messaging.d line...

This works for the reduced test program but not for my whole project. If you...

...64-bit since 2.085 IIRC. It will also never use optlink by default anymore.

I'll give you another option if you just need that fix.
Patch your phobos64...

By default Digger builds D for 32-bit only. However, it looks like Dub is...