#14531: tcIfaceGlobal (local): not found --------------------------------------+--------------------------------- Reporter: bigos | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Keywords: Windows Msys2 | Operating System: Windows Architecture: x86_64 (amd64) | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+--------------------------------- I have installed Msys2 on Windows. In Msys2 I have installed Emacs, which I start with a custom cmd script with following environment variables set: {{{ SET PATH=C:\msys64\mingw64\bin;C:\msys64\usr\bin;%PATH% set XDG_DATA_DIRS=c:/msys64/mingw64/share set PKG_CONFIG_PATH=c:/msys64/mingw64/lib/pkgconfig set INCLUDE=c:/msys64/mingw64/include }}} The haskell I have is from Full Haskell Platform, https://haskell.org/platform/download/8.2.1/HaskellPlatform-8.2.1-full- x86_64-setup.exe Then I started eshell which I used to invoke this command: {{{ cabal install gi-gtk }}} Which after a while gave me following error. {{{ [91 of 95] Compiling GI.Pango.Objects.Layout ( GI\Pango\Objects\Layout.hs, dist\build\GI\Pango\Objects\Layout.o ) ghc.exe: panic! (the 'impossible' happened) (GHC version 8.2.1 for x86_64-unknown-mingw32): tcIfaceGlobal (local): not found You are in a maze of twisty little passages, all alike. While forcing the thunk for TyThing Layout which was lazily initialized by initIfaceCheck typecheckLoop, I tried to tie the knot, but I couldn't find Layout in the current type environment. If you are developing GHC, please read Note [Tying the knot] and Note [Type-checking inside the knot]. Consider rebuilding GHC with profiling for a better stack trace. Contents of current type environment: [] Call stack: CallStack (from HasCallStack): prettyCurrentCallStack, called at compiler\utils\Outputable.hs:1133:58 in ghc:Outputable callStackDoc, called at compiler\utils\Outputable.hs:1137:37 in ghc:Outputable pprPanic, called at compiler\iface\TcIface.hs:1696:23 in ghc:TcIface Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug cabal: Leaving directory 'C:\Users\Jacek\AppData\Local\Temp\cabal-tmp-8093 \gi-pango-1.0.15' Failed to install gi-gio-2.0.14 Build log ( C:\Users\Jacek\AppData\Roaming\cabal\logs\ghc-8.2.1\gi- gio-2.0.14-GKluzGq73QJBrHtRklhQDd.log ): Preprocessing library for gi-gio-2.0.14.. Building library for gi-gio-2.0.14.. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14531 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler