Well, I'm getting these errors: 
	bin/notify "doneq/q111076" "failed" "1:30"
	mawk: line 37: regular expression compile failed (missing
	operand)
	*
	printf: : Invalid argument (error 22)
	printf: : Invalid argument (error 22)
	printf: : Invalid argument (error 22)
	No recipient addresses found in header
If I change setup.cache to use awk instead of mawk:
	awk: error compiling regular expression /*/: *?+ not preceded by valid
	expression
	 source line 37 of program <<
	    function p(var ... >>
	 context is
				  >>>  gsub("*","",status) <<< ;
	printf: : Invalid argument (error 22)
	printf: : Invalid argument (error 22)
	printf: : Invalid argument (error 22)
	No recipient addresses found in header
I can't figure out which line 37 of which file. :-(
Exactly the same binary of mawk is running on my sites that do send
notifications as on the problem site where I'm getting those errors.