Resolving dependencies... cabal: Entering directory '/tmp/cabal-tmp-24045/mtl-2.2.1' Configuring mtl-2.2.1... Building mtl-2.2.1... Preprocessing library mtl-2.2.1... [ 1 of 22] Compiling Control.Monad.Writer.Class ( Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o ) [ 2 of 22] Compiling Control.Monad.Trans ( Control/Monad/Trans.hs, dist/build/Control/Monad/Trans.o ) [ 3 of 22] Compiling Control.Monad.Writer.Lazy ( Control/Monad/Writer/Lazy.hs, dist/build/Control/Monad/Writer/Lazy.o ) [ 4 of 22] Compiling Control.Monad.Writer ( Control/Monad/Writer.hs, dist/build/Control/Monad/Writer.o ) [ 5 of 22] Compiling Control.Monad.Writer.Strict ( Control/Monad/Writer/Strict.hs, dist/build/Control/Monad/Writer/Strict.o ) [ 6 of 22] Compiling Control.Monad.State.Class ( Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o ) [ 7 of 22] Compiling Control.Monad.State.Lazy ( Control/Monad/State/Lazy.hs, dist/build/Control/Monad/State/Lazy.o ) [ 8 of 22] Compiling Control.Monad.State.Strict ( Control/Monad/State/Strict.hs, dist/build/Control/Monad/State/Strict.o ) [ 9 of 22] Compiling Control.Monad.State ( Control/Monad/State.hs, dist/build/Control/Monad/State.o ) [10 of 22] Compiling Control.Monad.Reader.Class ( Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o ) [11 of 22] Compiling Control.Monad.Reader ( Control/Monad/Reader.hs, dist/build/Control/Monad/Reader.o ) [12 of 22] Compiling Control.Monad.RWS.Class ( Control/Monad/RWS/Class.hs, dist/build/Control/Monad/RWS/Class.o ) [13 of 22] Compiling Control.Monad.RWS.Lazy ( Control/Monad/RWS/Lazy.hs, dist/build/Control/Monad/RWS/Lazy.o ) [14 of 22] Compiling Control.Monad.RWS.Strict ( Control/Monad/RWS/Strict.hs, dist/build/Control/Monad/RWS/Strict.o ) [15 of 22] Compiling Control.Monad.RWS ( Control/Monad/RWS.hs, dist/build/Control/Monad/RWS.o ) [16 of 22] Compiling Control.Monad.List ( Control/Monad/List.hs, dist/build/Control/Monad/List.o ) [17 of 22] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs, dist/build/Control/Monad/Identity.o ) [18 of 22] Compiling Control.Monad.Error.Class ( Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o ) [19 of 22] Compiling Control.Monad.Except ( Control/Monad/Except.hs, dist/build/Control/Monad/Except.o ) [20 of 22] Compiling Control.Monad.Error ( Control/Monad/Error.hs, dist/build/Control/Monad/Error.o ) [21 of 22] Compiling Control.Monad.Cont.Class ( Control/Monad/Cont/Class.hs, dist/build/Control/Monad/Cont/Class.o ) [22 of 22] Compiling Control.Monad.Cont ( Control/Monad/Cont.hs, dist/build/Control/Monad/Cont.o ) Running Haddock for mtl-2.2.1... Running hscolour for mtl-2.2.1... Preprocessing library mtl-2.2.1... Preprocessing library mtl-2.2.1... Haddock coverage: 75% ( 3 / 4) in 'Control.Monad.Writer.Class' Missing documentation for: MonadWriter (Control/Monad/Writer/Class.hs:62) 100% ( 3 / 3) in 'Control.Monad.Trans' 89% ( 17 / 19) in 'Control.Monad.Writer.Lazy' Missing documentation for: MonadWriter (Control/Monad/Writer/Class.hs:62) runWriterT 100% ( 2 / 2) in 'Control.Monad.Writer' 94% ( 17 / 18) in 'Control.Monad.Writer.Strict' Missing documentation for: MonadWriter (Control/Monad/Writer/Class.hs:62) 100% ( 5 / 5) in 'Control.Monad.State.Class' 96% ( 24 / 25) in 'Control.Monad.State.Lazy' Missing documentation for: runStateT 96% ( 24 / 25) in 'Control.Monad.State.Strict' Missing documentation for: runStateT 100% ( 2 / 2) in 'Control.Monad.State' 100% ( 3 / 3) in 'Control.Monad.Reader.Class' 96% ( 22 / 23) in 'Control.Monad.Reader' Missing documentation for: runReaderT 80% ( 4 / 5) in 'Control.Monad.RWS.Class' Missing documentation for: MonadRWS (Control/Monad/RWS/Class.hs:44) 95% ( 21 / 22) in 'Control.Monad.RWS.Lazy' Missing documentation for: runRWST 95% ( 21 / 22) in 'Control.Monad.RWS.Strict' Missing documentation for: runRWST 100% ( 2 / 2) in 'Control.Monad.RWS' 100% ( 5 / 5) in 'Control.Monad.List' 100% ( 4 / 4) in 'Control.Monad.Identity' 100% ( 3 / 3) in 'Control.Monad.Error.Class' 100% ( 19 / 19) in 'Control.Monad.Except' 93% ( 14 / 15) in 'Control.Monad.Error' Missing documentation for: runErrorT 50% ( 1 / 2) in 'Control.Monad.Cont.Class' Missing documentation for: MonadCont (Control/Monad/Cont/Class.hs:73) 91% ( 20 / 22) in 'Control.Monad.Cont' Missing documentation for: MonadCont (Control/Monad/Cont/Class.hs:73) runContT Documentation created: dist/doc/html/mtl/index.html, dist/doc/html/mtl/mtl.txt Creating package registration file: /tmp/pkgConf-mtl-2.22145174067468703135.1 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-8.0.1.20161018/mtl-2.2.1-6qsR1PHUy5lL47Hpoa4jCM Registering mtl-2.2.1... cabal: Leaving directory '/tmp/cabal-tmp-24045/mtl-2.2.1' Installed mtl-2.2.1 cabal: Entering directory '/tmp/cabal-tmp-24045/cpuperf-0.1.1' Configuring cpuperf-0.1.1... Building cpuperf-0.1.1... Preprocessing executable 'cpuperf' for cpuperf-0.1.1... Shell.hs:1:12: warning: -fglasgow-exts is deprecated: Use individual extensions instead [1 of 3] Compiling Process ( Process.hs, dist/build/cpuperf/cpuperf-tmp/Process.o ) Process.hs:11:9: error: • Ambiguous type variable ‘a0’ arising from a use of ‘handle’ prevents the constraint ‘(Exception a0)’ from being solved. Probable fix: use a type annotation to specify what ‘a0’ should be. These potential instances exist: instance Exception NestedAtomically -- Defined in ‘Control.Exception.Base’ instance Exception NoMethodError -- Defined in ‘Control.Exception.Base’ instance Exception NonTermination -- Defined in ‘Control.Exception.Base’ ...plus 18 others (use -fprint-potential-instances to see them all) • In the expression: handle (fail . show) In the expression: handle (fail . show) $ do { (ih, oh, eh, pid) <- runInteractiveCommand s; so <- hGetContents oh; se <- hGetContents eh; hClose ih; .... } In an equation for ‘run’: run s = handle (fail . show) $ do { (ih, oh, eh, pid) <- runInteractiveCommand s; so <- hGetContents oh; se <- hGetContents eh; .... } Process.hs:11:24: error: • Ambiguous type variable ‘a0’ arising from a use of ‘show’ prevents the constraint ‘(Show a0)’ from being solved. Probable fix: use a type annotation to specify what ‘a0’ should be. These potential instances exist: instance Show NestedAtomically -- Defined in ‘Control.Exception.Base’ instance Show NoMethodError -- Defined in ‘Control.Exception.Base’ instance Show NonTermination -- Defined in ‘Control.Exception.Base’ ...plus 48 others ...plus 8 instances involving out-of-scope types (use -fprint-potential-instances to see them all) • In the second argument of ‘(.)’, namely ‘show’ In the first argument of ‘handle’, namely ‘(fail . show)’ In the expression: handle (fail . show) cabal: Leaving directory '/tmp/cabal-tmp-24045/cpuperf-0.1.1' Failed to install cpuperf-0.1.1 cabal: Error: some packages failed to install: cpuperf-0.1.1 failed during the building phase. The exception was: ExitFailure 1