Re #6848 Update CI on update of Docker images

.github/workflows/integration-tests.yml

@@ -16,10 +16,13 @@ on:
 env:
   GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-# As of 2026-01-30, ubuntu-latest and windows-latest come with Stack 3.9.1 and
-# GHC 9.14.1. However, macos-15-intel and macos-latest do not come with Haskell
-# tools. windows-latest no longer comes with NSIS 3.10, for which the default
-# value of the 'Unicode' installer attribute is 'true'. However, that is not the
+# As of 2026-03-01:
+# * ubuntu-latest comes with Stack 3.9.3 and GHC 9.14.1; and
+# * windows-latest comes with Stack 3.9.1 and GHC 9.14.1.
+# However, macos-15-intel and macos-latest do not come with Haskell tools.
+#
+# windows-latest no longer comes with NSIS 3.10, for which the default value of
+# the 'Unicode' installer attribute is 'true'. However, that is not the
 # 'large strings' build of NSIS and creates installers that corrupt the PATH
 # environment variable if the default string length of 1024 characters is
 # exceeded.
@@ -40,7 +43,7 @@ jobs:
           # Stack's project-level configuration (stack.yaml) specifies the
           # multi-architecture (including Linux/Aarch64) Docker image published
           # by Oliver Benz (@benz0li, on GitHub). That image comes with
-          # Stack 3.9.1. (Note that the online documentation for
+          # Stack 3.9.3. (Note that the online documentation for
           # '--docker-stack-exe image' specifies that the host Stack and image
           # Stack must have the same version number.)
           release-args: "--alpine --stack-args --docker-stack-exe=image"
@@ -99,11 +102,21 @@ jobs:
 
         if [[ "${{ matrix.os }}" == "ubuntu-24.04-arm" || "${{ matrix.os }}" == "macos-15-intel" || "${{ matrix.os }}" == "macos-latest" ]]
         then
-          # ubuntu-24.04-arm, macos-15-intel and macos-latest do not include
-          # Haskell tools as at 2026-01-30.
+          # As at 2026-03-01:
+          #
+          # * ubuntu-24.04-arm, macos-15-intel and macos-latest do not include
+          #   Haskell tools.
           curl -sSL https://get.haskellstack.org/ | sh
         fi
 
+        if [[ "${{ matrix.os }}" == "windows-latest" ]]
+        then
+          # As at 2026-03-01:
+          #
+          # * windows-latest does not include Stack 3.9.3.
+          stack upgrade
+        fi
+
         if [[ "${{ matrix.os }}" == "ubuntu-latest" ]]
         then
           # Install a faster linker (lld) than Ubuntu's default.
@@ -151,14 +164,6 @@ jobs:
         EOF
         fi
 
-        # A temporary fix, due to Docker 29.0.0 and later producing an error
-        # message in a format not recognised by Stack 3.9.1 or earlier. See
-        # https://github.com/commercialhaskell/stack/issues/6848
-        if [[ "${{ matrix.release-args }}" == "--alpine" ]]
-        then
-            docker pull quay.io/benz0li/ghc-musl:9.10.3
-        fi
-
         # In case GHCup hooks have been created, remove them
         if [ -d $(stack path --stack-root)/hooks ]
         then

.github/workflows/unit-tests.yml

@@ -9,8 +9,10 @@ on:
     - rc/**
   workflow_dispatch:
 
-# As of 2026-01-30, ubuntu-latest and windows-latest come with Stack 3.9.1
-# and GHC 9.14.1. However, macos-latest does not come with Haskell tools.
+# As of 2026-03-01:
+# * ubuntu-latest comes with Stack 3.9.3 and GHC 9.14.1; and
+# * windows-latest comes with Stack 3.9.1 and GHC 9.14.1.
+# However, macos-15-intel and macos-latest do not come with Haskell tools.
 
 jobs:
   pedantic:
@@ -76,10 +78,20 @@ jobs:
 
         if [[ "${{ matrix.os }}" == "macos-latest" ]]
         then
-          # macos-latest does not include Haskell tools as at 2026-01-30.
+          # As at 2026-03-01:
+          #
+          # * macos-latest does not include Haskell tools.
           curl -sSL https://get.haskellstack.org/ | sh
         fi
 
+        if [[ "${{ matrix.os }}" == "windows-latest" ]]
+        then
+          # As at 2026-03-01:
+          #
+          # * windows-latest does not include Stack 3.9.3.
+          stack upgrade
+        fi
+
         if [[ "${{ matrix.extra-suffix }}" == "alpine" ]]
         then
             mkdir -p ~/.stack
@@ -93,14 +105,6 @@ jobs:
         EOF
         fi
 
-        # A temporary fix, due to Docker 29.0.0 and later producing an error
-        # message in a format not recognised by Stack 3.9.1 or earlier. See
-        # https://github.com/commercialhaskell/stack/issues/6848
-        if [[ "${{ matrix.extra-suffix }}" == "alpine" ]]
-        then
-            docker pull quay.io/benz0li/ghc-musl:9.10.3
-        fi
-
         stack test ${{ matrix.stack-args }} --haddock --no-haddock-deps --ghc-options="-Werror -O0" --copy-bins --local-bin-path bin
 
         # Get output about whether the exe is dynamically linked