id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
10134	"Cancel button doesn't work during ""Starting Tag checker (MapCSS based)"" phase of validation"	mkoniecz	team	"To reproduce: download nontrivial dataset (around 10 MB is enough for my computer)
start validation
wait for ""Starting Tag checker (MapCSS based)""
use cancel
wait multiple minutes for lack of any change (expected: validation will be cancelled immediately)

related (about other cancel buttons refusing to work): #5730 #5291 #5973 #8601"	defect	closed	normal	15.10	Core validator		fixed