#13604: regression in ghc 8.2.1-rc1 (8.2.0.2017040) -------------------------------------+------------------------------------- Reporter: George | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Runtime Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- In 8.2.1-rc1 loading a file compiled with -O2 into ghci results in ghci recompiling the file into interpreted byte code. In 8.0.2 it simply loads the compiled object file. 8.2.1 {{{ ghc -dynamic -O2 eh2.hs [1 of 1] Compiling Main ( eh2.hs, eh2.o ) Linking eh2 ... bash-3.2$ ghci -ignore-dot-ghci GHCi, version 8.2.0.20170404: http://www.haskell.org/ghc/ :? for help Prelude> :load eh2 [1 of 1] Compiling Main ( eh2.hs, interpreted ) [flags changed] Ok, modules loaded: Main. }}} 8.0.2 {{{ ghc --version The Glorious Glasgow Haskell Compilation System, version 8.0.2 bash-3.2$ pwd /Users/gcolpitts/haskell bash-3.2$ ghc -dynamic -O2 eh2.hs [1 of 1] Compiling Main ( eh2.hs, eh2.o ) Linking eh2 ... bash-3.2$ ghci -ignore-dot-ghci GHCi, version 8.0.2: http://www.haskell.org/ghc/ :? for help Prelude> :load eh2 Ok, modules loaded: Main (eh2.o). }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13604 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler