id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
2131	concprog001(threaded2) occasional failures.	simonmar	simonmar	"This one has so far resisted my attempts to debug it.  The most common error is ""thread blocked indefinitely"": I don't know whether it's a bug in the RTS or allowed behaviour for this program, but it only seems to occur on a multiprocessor with `+RTS -N2`, and only in one out of 10 runs or so.

Also I've seen

 * hanging using 100% CPU without apparently making any progress
 * another type of crash I didn't make a note of at the time.
"	bug	closed	normal	6.10 branch	Runtime System	6.8.2	fixed			Unknown/Multiple	Unknown/Multiple		Rocket Science	concprog001