SingletonSupplier is not singleton if null is returned on first supplier call
          
            #1248
        
      Workflow file for this run
  
    
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  | name: Build Pull Request | |
| on: pull_request | |
| permissions: | |
| contents: read | |
| jobs: | |
| build: | |
| name: Build Pull Request | |
| if: ${{ github.repository == 'spring-projects/spring-framework' }} | |
| runs-on: ubuntu-latest | |
| timeout-minutes: 60 | |
| steps: | |
| - name: Check Out Code | |
| uses: actions/checkout@v4 | |
| - name: Build | |
| id: build | |
| uses: ./.github/actions/build | |
| - name: Print JVM Thread Dumps When Cancelled | |
| if: cancelled() | |
| uses: ./.github/actions/print-jvm-thread-dumps | |
| - name: Upload Build Reports | |
| if: failure() | |
| uses: actions/upload-artifact@v4 | |
| with: | |
| name: build-reports | |
| path: '**/build/reports/' |