Why do so many exception messages start with a ;?

The raw log files also show the ; prefixes? Looks more like a bug in the extension to me.

nup, that’s what i’m seeing in the raw logs too

"ERROR","ajp-nio-8009-exec-10","03/24/2018","15:52:18","",";key [__GROUP] doesn't exist;lucee.runtime.exp.ExpressionException: key [__GROUP] doesn't exist
	at lucee.runtime.type.util.StructSupport.invalidKey(StructSupport.java:69)
	at lucee.runtime.type.StructImpl.get(StructImpl.java:135)