GHC9 Doctest Problem Minimal Demonstration

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ on:
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   # This workflow contains a single job called "build"
-  ghc8_10:
+  ghc9_0:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
@@ -33,10 +33,10 @@ jobs:
       - uses: actions/checkout@v2
       - uses: haskell/actions/setup@v1
         with:
-          ghc-version: '8.10.5' # Exact version of ghc to use
-          # cabal-version: 'latest'. Omitted, but defalts to 'latest'
           enable-stack: true
           stack-version: 'latest'
+          stack-no-global: true
+          stack-setup-ghc: true
 
       - name: build
         run: stack build --fast
@@ -63,7 +63,7 @@ jobs:
             ".stack-work"
             "/root/.stack/"
           key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
-  ghc8_8:
+  ghc8_10:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
@@ -85,16 +85,16 @@ jobs:
       - uses: actions/checkout@v2
       - uses: haskell/actions/setup@v1
         with:
-          ghc-version: '8.8.4' # Exact version of ghc to use
-          # cabal-version: 'latest'. Omitted, but defalts to 'latest'
           enable-stack: true
           stack-version: 'latest'
+          stack-no-global: true
+          stack-setup-ghc: true
 
       - name: build
-        run: stack build --fast
+        run: stack build --fast --stack-yaml stack-ghc8_10.yaml
 
       - name: test
-        run: stack test --fast
+        run: stack test --fast --stack-yaml stack-ghc8_10.yaml
         env:
           PG_USER: postgres
           PG_HOST: localhost
@@ -103,10 +103,10 @@ jobs:
           PG_PORT: ${{ job.services.postgres.ports['5432'] }}
 
       - name: benchmark
-        run: stack bench --fast
+        run: stack bench --fast --stack-yaml stack-ghc8_10.yaml
 
       - name: documentation
-        run: stack haddock --fast
+        run: stack haddock --fast --stack-yaml stack-ghc8_10.yaml
 
       - name: cache
         uses: actions/cache@v2
@@ -115,7 +115,7 @@ jobs:
             ".stack-work"
             "/root/.stack/"
           key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
-  ghc8_6:
+  ghc8_8:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
@@ -137,16 +137,16 @@ jobs:
       - uses: actions/checkout@v2
       - uses: haskell/actions/setup@v1
         with:
-          ghc-version: '8.6.5' # Exact version of ghc to use
-          # cabal-version: 'latest'. Omitted, but defalts to 'latest'
           enable-stack: true
           stack-version: 'latest'
+          stack-no-global: true
+          stack-setup-ghc: true
 
       - name: build
-        run: stack build --fast
+        run: stack build --fast --stack-yaml stack-ghc8_8.yaml
 
       - name: test
-        run: stack test --fast
+        run: stack test --fast --stack-yaml stack-ghc8_8.yaml
         env:
           PG_USER: postgres
           PG_HOST: localhost
@@ -155,10 +155,10 @@ jobs:
           PG_PORT: ${{ job.services.postgres.ports['5432'] }}
 
       - name: benchmark
-        run: stack bench --fast
+        run: stack bench --fast --stack-yaml stack-ghc8_8.yaml
 
       - name: documentation
-        run: stack haddock --fast
+        run: stack haddock --fast --stack-yaml stack-ghc8_8.yaml
 
       - name: cache
         uses: actions/cache@v2

.gitignore

@@ -19,5 +19,6 @@ cabal.sandbox.config
 cabal.project.local
 .DS_Store
 stack.yaml.lock
+*.yaml.lock
 tags
 .*.swp