April 2026 - ghc-devs

Loss of debug output
by Simon Peyton Jones 04 Apr '26

04 Apr '26

Suddenly, after pulling today's patches, my standard workflow doesn't work. - -ddump-simpl no longer shows the simplified Core - -dverbose-core2core no longer shows the output of each pass What has happened?? Thanks Simon

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If static001 fails on darwin, please rebase
by Magnus Viernickel 04 Apr '26

04 Apr '26

Dear GHC devs, I have recently updated the darwin (MacOS) runners to a newer OS and toolchain. That caused a test called static001 to fail. I have landed a fix. If your MR pipelines fail on darwin because of static001, you can fix this issue by rebasing on origin/master. I am sorry for the inconvenience caused. Thanks everyone for your patience. I am seeing a light at the end of the tunnel of bringing things up to date, you almost made it! Have a nice weekend. Best Magnus

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Boot libraries for GHC 10.0
by Zubin Duggal 02 Apr '26

02 Apr '26

Hi all, The GHC 10.0 branch is scheduled to be cut next week. You are receiving this email because you are listed as a maintainer on a boot library or have uploaded a version to hackage recently. Below are the current versions of all boot libraries and submodules in the GHC tree. Libraries behind Hackage: - file-io: 0.1.5 in tree, 0.2.0 on Hackage - filepath: 1.5.4.0 in tree, 1.5.5.0 on Hackage - os-string: 2.0.8 in tree, 2.0.10 on Hackage - process: 1.6.26.1 in tree, 1.6.27.0 on Hackage Unless there are objections, we will attempt to bump these four libraries to their latest Hackage versions before the fork. Libraries currently at the latest Hackage version: - Cabal 3.16.1.0 - Cabal-syntax 3.16.1.0 - Win32 2.14.2.1 - array 0.5.8.0 - binary 0.8.9.3 - bytestring 0.12.2.0 - containers 0.8 - deepseq 1.5.2.0 - directory 1.3.10.1 - exceptions 0.10.12 - haskeline 0.8.4.1 - hpc 0.7.0.2 - hsc2hs 0.68.10 - libffi-clib 3.5.2 - mtl 2.3.2 - parsec 3.1.18.0 - pretty 1.1.3.6 - semaphore-compat 1.0.0 - stm 2.5.3.1 - template-haskell-lift 0.1.0.0 - template-haskell-quasiquoter 0.1.0.0 - terminfo 0.4.1.7 - text 2.1.4 - time 1.15 - transformers 0.6.3.0 - unix 2.8.8.0 - xhtml 3000.4.0.0 I presume there will also be a corresponding Cabal 3.18 release, which we will coordinate with the Cabal developlers. Otherwise, if you would like a different version of any library to ship with GHC 10.0, please open a GHC ticket at https://gitlab.haskell.org/ghc/ghc/-/issues/new so we can track it. Thanks, Zubin

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