#15111: GHCi leaks the first modules loaded -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: ghci Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonmar): * owner: (none) => simonmar -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15111#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15111: GHCi leaks the first modules loaded -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: ghci Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4658 Wiki Page: | Phab:D4659 -------------------------------------+------------------------------------- Changes (by simonmar): * differential: Phab:D4658,Phab:D4659 => Phab:D4658 Phab:D4659 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15111#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15111: GHCi leaks the first modules loaded -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: ghci Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4658 Wiki Page: | Phab:D4659 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"f27e4f624fe1270e8027ff0a14f03514f5be31b7/ghc" f27e4f6/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="f27e4f624fe1270e8027ff0a14f03514f5be31b7" Fix GHCi space leaks (#15111) Summary: There were a number of leaks causing previously loaded modules to be retained after a new `:load`. This fixes enough leaks to get the tests to pass from D4658. Test Plan: See new tests in D4658 Reviewers: niteria, bgamari, simonpj, erikd Subscribers: thomie, carter GHC Trac Issues: #15111 Differential Revision: https://phabricator.haskell.org/D4659 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15111#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15111: GHCi leaks the first modules loaded -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: bug | Status: closed Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: fixed | Keywords: ghci Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4658 Wiki Page: | Phab:D4659 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"5b6ef59f99590128394b9dd9717b07fa971f6fc0/ghc" 5b6ef59/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="5b6ef59f99590128394b9dd9717b07fa971f6fc0" Add -fghci-leak-check to check for space leaks Summary: (re-applying this patch now that D4659 is committed) Space leaks in GHCi emerge from time to time and tend to come back again after they get fixed. This is an attempt to limit regressions by * adding a reliable detection for some classes of space leaks in GHCi * turning on leak checking for all GHCi tests in the test suite, so that we'll notice if the leak appears again. The idea for detecting space leaks is quite simple: * find some data that we expect to be GC'd later, make a weak pointer to it * when we expect the data to be dead, do a `performGC` and then check the status of the weak pointer. It would be nice to apply this trick to lots of things in GHC, e.g. ensuring that HsSyn is not retained after the desugarer, or ensuring that CoreSyn from the previous simplifier pass is not retained. Test Plan: validate Reviewers: bgamari, simonpj, erikd, niteria Subscribers: thomie, carter GHC Trac Issues: #15111 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15111#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler