Resolving dependencies... Build profile: -w ghc-9.8.4 -O0 In order, the following will be built (use -v for more details): - deriving-via-fun-0.1.0.0 (first run) Configuring deriving-via-fun-0.1.0.0... Preprocessing library for deriving-via-fun-0.1.0.0.. Building library for deriving-via-fun-0.1.0.0.. [1 of 1] Compiling DerivingViaFun ( src/DerivingViaFun.hs, /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/build/DerivingViaFun.o, /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/build/DerivingViaFun.dyn_o ) src/DerivingViaFun.hs:455:3: warning: [GHC-50928] [-Wnoncanonical-monoid-instances] Noncanonical mappend definition detected in the instance declaration for Monoid (Fun (f :: a ~> b)). mappend will eventually be removed in favour of (<>) Suggested fix: Either remove definition for mappend (recommended) or define as mappend = (<>) See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid | 455 | mappend (Fun x) (Fun y) = Fun (x <> y) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ src/DerivingViaFun.hs:549:13: warning: [GHC-68441] [-Wdeprecations] In the use of bitSize (imported from Data.Bits, but defined in GHC.Bits): Deprecated: "Use 'bitSizeMaybe' or 'finiteBitSize' instead" | 549 | bitSize = bitSize . unfun | ^^^^^^^ src/DerivingViaFun.hs:590:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances] Noncanonical return definition detected in the instance declaration for Monad (Fun1 (f :: p ~> q)). return will eventually be removed in favour of pure Suggested fix: Either remove definition for return (recommended) or define as return = pure See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return | 590 | return = Fun1 . pure | ^^^^^^^^^^^^^^^^^^^^ src/DerivingViaFun.hs:592:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances] Noncanonical (>>) definition detected in the instance declaration for Monad (Fun1 (f :: p ~> q)). (>>) will eventually be removed in favour of (*>) Suggested fix: Either remove definition for (>>) (recommended) or define as (>>) = (*>) See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return | 592 | u >> v = fun1 (unfun1 u >> unfun1 v) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Preprocessing test suite 'deriving-via-fun-test' for deriving-via-fun-0.1.0.0.. Building test suite 'deriving-via-fun-test' for deriving-via-fun-0.1.0.0.. [1 of 1] Compiling Main ( test/Main.hs, /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/build/deriving-via-fun-test/deriving-via-fun-test-tmp/Main.o ) [2 of 2] Linking /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/build/deriving-via-fun-test/deriving-via-fun-test Running 1 test suites... Test suite deriving-via-fun-test: RUNNING... Test suite deriving-via-fun-test: PASS Test suite logged to: /var/lib/hackage-doc-builder/build-cache/tmp-install/reports/deriving-via-fun-0.1.0.0.test Writing: deriving-via-fun-0.1.0.0-inplace/DerivingViaFun.hs.html Writing: hpc_index.html Writing: hpc_index_fun.html Writing: hpc_index_alt.html Writing: hpc_index_exp.html Test coverage report written to /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/hpc/vanilla/html/deriving-via-fun-test/hpc_index.html 1 of 1 test suites (1 of 1 test cases) passed. Writing: deriving-via-fun-0.1.0.0-inplace/DerivingViaFun.hs.html Writing: hpc_index.html Writing: hpc_index_fun.html Writing: hpc_index_alt.html Writing: hpc_index_exp.html Package coverage report written to /var/lib/hackage-doc-builder/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.8.4/deriving-via-fun-0.1.0.0/noopt/hpc/vanilla/html/deriving-via-fun-0.1.0.0/hpc_index.html