id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	difficulty
473	guard-procedure should not be reinvoked when restoring parameter value using `parameterize'	felix winkelmann	felix winkelmann	"(This was reported by Joo ChurlSoo)

Restoring the old value after execution of the body of a `parameterize` form will reinvoke the guard, which is incorrent, if it performs a conversion (for example `number->string`).
"	defect	closed	major	4.9.0	core libraries	4.6.x	fixed	parameterize