BEGIN {

	split("0|0a", f, "|")

	z = exp(f[1])	# no warning, since strnum converted to number

	x = f[2]+0	# trigger NUMCUR

	z = exp(f[2])	# should print a warning

	x = "0"

	y = x+0		# trigger NUMCUR

	z = exp(x)	# should print a warning, since x is still a string!

}