#3379: GHC should use the standard binary package -------------------------------------+------------------------------------- Reporter: igloo | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 6.10.4 Resolution: | Keywords: 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 ulysses4ever): * cc: ulysses4ever (added) Comment: I've been thinking about this one lately. For the sake of experiment, I tried to replace the implementation of a hand-crafted Binary instance (namely, the one for `ArgType`) with the implementation derived by Data.Binary via GHC.Generics. This alone immediately led GHC into panic (see below). [https://gitlab.staging.haskell.org/ulysses4ever/ghc/commit/6156a260cd775a1d7... The patch is here]. Maybe my new instance has some flaw? Can anyone comment on any of these? {{{ $ make ===--- building phase 0 make --no-print-directory -f ghc.mk phase=0 phase_0_builds make[1]: Nothing to be done for 'phase_0_builds'. ===--- building phase 1 make --no-print-directory -f ghc.mk phase=1 phase_1_builds ===--- building final phase make --no-print-directory -f ghc.mk phase=final all "inplace/bin/ghc-stage2" -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc -fPIC -dynamic -O -H64m -Wall -hide-all-packages -i -iutils/ghctags/. -iutils/ghctags/dist-install/build -Iutils/ghctags/dist-install/build -iutils/ghctags/dist-install/build/ghctags/autogen -Iutils/ghctags/dist- install/build/ghctags/autogen -optP-include -optPutils/ghctags/dist- install/build/ghctags/autogen/cabal_macros.h -package-id Cabal-2.5.0.0 -package-id base-4.12.0.0 -package-id containers-0.6.0.1 -package-id ghc-8.7 -XHaskell2010 -no-user-package-db -rtsopts -Wnoncanonical- monad-instances -odir utils/ghctags/dist-install/build -hidir utils/ghctags/dist-install/build -stubdir utils/ghctags/dist-install/build -c utils/ghctags/./Main.hs -o utils/ghctags/dist-install/build/Main.dyn_o ghc-stage2: panic! (the 'impossible' happened) (GHC version 8.7.20181207 for x86_64-unknown-linux): Binary(IfaceConDecls).get: Invalid IfaceConDecls CallStack (from HasCallStack): error, called at compiler/iface/IfaceSyn.hs:1896:18 in ghc:IfaceSyn Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug utils/ghctags/ghc.mk:18: recipe for target 'utils/ghctags/dist- install/build/Main.dyn_o' failed make[1]: *** [utils/ghctags/dist-install/build/Main.dyn_o] Error 1 Makefile:123: recipe for target 'all' failed make: *** [all] Error 2 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3379#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler