I recently ran the testsuite and experienced a very large number of testsuite failures, all of which seem to involve the new -fghci-leak-check flag. Here is the list of tests that fail: Unexpected failures: ghci/prog001/prog001.run prog001 [bad stdout] (ghci) ghci/prog002/prog002.run prog002 [bad stdout] (ghci) ghci/prog003/prog003.run prog003 [bad stdout] (ghci) ghci/prog010/ghci.prog010.run ghci.prog010 [bad stdout] (ghci) ghci/prog013/prog013.run prog013 [bad stdout] (ghci) ghci/prog012/prog012.run prog012 [bad stdout] (ghci) ghci/prog009/ghci.prog009.run ghci.prog009 [bad stdout] (ghci) ghci/scripts/ghci025.run ghci025 [bad stdout] (ghci) ghci/scripts/ghci038.run ghci038 [bad stdout] (ghci) ghci/scripts/ghci057.run ghci057 [bad stdout] (ghci) ghci/scripts/T2182ghci.run T2182ghci [bad stdout] (ghci) ghci/scripts/ghci058.run ghci058 [bad stdout] (ghci) ghci/scripts/T6106.run T6106 [bad stdout] (ghci) ghci/scripts/T8353.run T8353 [bad stdout] (ghci) ghci/scripts/T9293.run T9293 [bad stdout] (ghci) ghci/scripts/T10989.run T10989 [bad stdout] (ghci) ghci/should_run/T13825-ghci.run T13825-ghci [bad stdout] (ghci) ghci.debugger/scripts/print007.run print007 [bad stdout] (ghci) ghci.debugger/scripts/break009.run break009 [bad stdout] (ghci) ghci.debugger/scripts/break008.run break008 [bad stdout] (ghci) ghci.debugger/scripts/break026.run break026 [bad stdout] (ghci) perf/space_leaks/T4029.run T4029 [bad stdout] (ghci) And the full failing test output can be found here [1]. (I won't post it inline, since it's quite large). Are these changes expected? I'm not at all familiar with -fghci-leak-check, so I don't know if we should accept the new output or not. Ryan S. ----- [1] https://gist.githubusercontent.com/RyanGlScott/f920737287049b82947e1c47cdbc2...