Hi, It's not possible to build the Happy glr examples using GHC 6.10.3 and Happy 1.18.4: cetin@unique:~/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr$ make make loop CMD=run make[1]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr' for d in expr-eval expr-tree expr-monad hidden-leftrec highly-ambiguous packing nlp bio-eg; do (cd $d && make run); done make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-eval' # might want to run happy with --ghc ghc -I../common -i../common -package data -O -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-eval' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-tree' # might want to run happy with --ghc ghc -I../common -i../common -package data -O2 -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-tree' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-monad' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/expr-monad' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/hidden-leftrec' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/hidden-leftrec' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/highly-ambiguous' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/highly-ambiguous' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/packing' Makefile:8: warning: overriding commands for target `.y.hs' ../Makefile.defs:15: warning: ignoring old commands for target `.y.hs' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/packing' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/nlp' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o english --make Main.lhs <command line>: unknown package: data make[2]: *** [english] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/nlp' make[2]: Entering directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/bio-eg' Making BioData.hs WITHOUT optimisation (for speed) ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -funfolding-use-threshold0 -fno-strictness -c BioData.hs <command line>: unknown package: data make[2]: *** [BioData.hi] Error 1 make[2]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr/bio-eg' make[1]: *** [loop] Error 2 make[1]: Leaving directory `/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr' make: *** [all] Error 2 cetin@unique:~/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr$ cabal update Downloading the latest package list from hackage.haskell.org cetin@unique:~/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr$ cabal install data cabal: There is no package named data cetin@unique:~/.cabal/packages/ hackage.haskell.org/happy/1.18.4/happy-1.18.4/examples/glr$ happy --version; ghc --version Happy Version 1.18.4 Copyright (c) 1993-1996 Andy Gill, Simon Marlow (c) 1997-2005 Simon Marlow Happy is a Yacc for Haskell, and comes with ABSOLUTELY NO WARRANTY. This program is free software; you can redistribute it and/or modify it under the terms given in the file 'LICENSE' distributed with the Happy sources. The Glorious Glasgow Haskell Compilation System, version 6.10.3 or GHC 6.10.1 and Happy 1.18.2: cetin@sweethome:~/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr$ makemake loop CMD=run make[1]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr' for d in expr-eval expr-tree expr-monad hidden-leftrec highly-ambiguous packing nlp bio-eg; do (cd $d && make run); done make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-eval' # might want to run happy with --ghc ghc -I../common -i../common -package data -O -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-eval' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-tree' # might want to run happy with --ghc ghc -I../common -i../common -package data -O2 -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-tree' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-monad' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/expr-monad' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/hidden-leftrec' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/hidden-leftrec' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/highly-ambiguous' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/highly-ambiguous' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/packing' Makefile:8: Warnung: Die Befehle für das Ziel ».y.hs« werden überschrieben ../Makefile.defs:15: Warnung: Alte Befehle für das Ziel ».y.hs« werden ignoriert ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o expr --make Main.lhs <command line>: unknown package: data make[2]: *** [expr] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/packing' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/nlp' ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -o english --make Main.lhs <command line>: unknown package: data make[2]: *** [english] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/nlp' make[2]: Betrete Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/bio-eg' Making BioData.hs WITHOUT optimisation (for speed) ghc -I../common -i../common -package data -cpp -fglasgow-exts -package lang -funfolding-use-threshold0 -fno-strictness -c BioData.hs <command line>: unknown package: data make[2]: *** [BioData.hi] Fehler 1 make[2]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr/bio-eg' make[1]: *** [loop] Fehler 2 make[1]: Verlasse Verzeichnis '/home/cetin/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr' make: *** [all] Fehler 2 cetin@sweethome:~/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr$ happy --version; ghc --version Happy Version 1.18.2 Copyright (c) 1993-1996 Andy Gill, Simon Marlow (c) 1997-2005 Simon Marlow Happy is a Yacc for Haskell, and comes with ABSOLUTELY NO WARRANTY. This program is free software; you can redistribute it and/or modify it under the terms given in the file 'LICENSE' distributed with the Happy sources. The Glorious Glasgow Haskell Compilation System, version 6.10.1 When I try to manually build something out of a .y file, I keep getting: cetin@sweethome:~/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr$ find | grep -E "y$" | xargs -n 1 echo happy -gcal happy -gcal ./packing/Expr.y happy -gcal ./highly-ambiguous/Expr.y happy -gcal ./expr-eval/Expr.y happy -gcal ./expr-monad/Expr.y happy -gcal ./nlp/English.y happy -gcal ./hidden-leftrec/Expr.y happy -gcal ./expr-tree/Expr.y happy -gcal ./bio-eg/Bio.y cetin@sweethome:~/.cabal/packages/ hackage.haskell.org/happy/1.18.2/happy-1.18.2/examples/glr$ find | grep -E "y$" | xargs -n 1 happy -gcal reduce/reduce conflicts: 2 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 7 reduce/reduce conflicts: 1 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 9 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 9 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 2 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 4 reduce/reduce conflicts: 1 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) shift/reduce conflicts: 9 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) unused rules: 20 shift/reduce conflicts: 35 reduce/reduce conflicts: 68 happy: src/ProduceGLRCode.lhs:190:11-76: Irrefutable pattern failed for pattern (pre, drop_me : post) Does anyone have solution for this? The irrefutable pattern failure issue is especially bothersome for me as I ran into it in a Fortran grammar I'm writing and got stuck. Best Regards, Cetin Sert