id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
4100	ghci should use UserInterrupt exception from base, not private Interrupted exception	duncan	simonmar	"In response to the user pressing control-C, ghci uses an exception `Interrupted :: GhcException` from the module `Panic`.

Testsuites designed to be used in ghci (like QuickCheck) need to distinguish this interrupted exception from other exceptions which indicate an actual failing test.

Since this exception is only defined in the ghc package, this means that packages such as QuickCheck are forced to depend on the ghc package. This causes no end of problems.

The solution is for ghci to use the (newer) exception from `Control.Exception`, `UserInterrupt :: AsyncException`. Then packages such as QC do not need to depend on the ghc package and everyone will be happy.

The QC developers indicate they're happy to switch it. They just need to know which version it will be fixed in, so they can write the appropriate CPP magic to do the right thing based on the ghc version."	bug	closed	normal		Compiler	6.12.2	fixed		nicsma@… michal.palka@…	Unknown/Multiple	Unknown/Multiple	None/Unknown