tests failing on stackage

[cdornan]

We are seeing this failure on stackage-nightly (ghc-9.6.3):

     Test suite failure for package markov-chain-usage-model-0.0.0
           markov-chain-usage-model-test:  exited with: ExitFailure 1
       Full log available at /home/curators/work/unpack-dir/.stack-work/logs/markov-chain-usage-model-0.0.0-test.log


           test/Spec.hs
             Unit
               expectExpectedArcReliability: OK
               expectTransientReliability:   OK
               occurenceMean:                OK
               occurenceVar:                 OK
               docTest:                      src/MarkovChain.hs:94: failure in expression `fundamental (minorMatrix 5 5 p :: M)'
           expected: ┌                                                                                 ┐
                     │                 1.0  1.2307692307692306  1.2307692307692308  0.9230769230769231 │
                     │                 0.0  1.2307692307692306  1.2307692307692308  0.9230769230769231 │
                     │                 0.0 0.15384615384615385  2.1538461538461537  0.6153846153846154 │
                     │                 0.0  0.3076923076923077  0.3076923076923077  1.2307692307692308 │
                     └                                                                                 ┘
            but got: ┌                                                                                 ┐
                     │                 1.0  1.2307692307692308  1.2307692307692308  0.9230769230769231 │
                                                             ^
                     │                 0.0  1.2307692307692308  1.2307692307692308  0.9230769230769231 │
                     │                 0.0 0.15384615384615385  2.1538461538461537  0.6153846153846154 │
                     │                 0.0  0.3076923076923077  0.3076923076923077  1.2307692307692308 │
                     └                                                                                 ┘

           src/MarkovChain.hs:112: failure in expression `occVariance (fundamental (minorMatrix 5 5 p :: M))'
           expected: ┌                                                                                 ┐
                     │                 0.0 0.28402366863905315  2.5562130177514795  0.4970414201183433 │
                     │                 0.0 0.28402366863905315  2.5562130177514795  0.4970414201183433 │
                     │                 0.0 0.20118343195266267  2.4852071005917153  0.5207100591715977 │
                     │                 0.0  0.3550295857988165  0.9230769230769231  0.2840236686390534 │
                     └                                                                                 ┘
            but got: ┌                                                                                 ┐
                     │                 0.0  0.2840236686390534  2.5562130177514795  0.4970414201183433 │
                                           ^
                     │                 0.0  0.2840236686390534  2.5562130177514795  0.4970414201183433 │
                     │                 0.0 0.20118343195266275  2.4852071005917153  0.5207100591715977 │
                     │                 0.0  0.3550295857988166  0.9230769230769231  0.2840236686390534 │
                     └                                                                                 ┘

           src/MarkovChain.hs:131: failure in expression `perron p'
           expected: [0.1857142857142857,0.22857142857142854,0.22857142857142856,0.17142857142857143,0.1857142857142857]
            but got: [0.1857142857142857,0.22857142857142856,0.22857142857142856,0.17142857142857143,0.1857142857142857]
                                                           ^

           src/MarkovChain.hs:157: failure in expression `:{
           let s :: M
               s = fromList 4 5
                 [ 1,    0,    0,    0,    0
                 , 0,    0.5,  0.5,  0,    0
                 , 0,    0.5,  0.25, 0.25, 0
                 , 0.25, 0,    0,    0.5,  0.25
                 ]
           in sigma s (perron p)
           :}'
           expected: [0.2807017543859649,0.2807017543859649,0.21052631578947367,0.17543859649122806,5.2631578947368425e-2]
            but got: [0.2807017543859649,0.2807017543859649,0.2105263157894737,0.17543859649122806,5.2631578947368425e-2]
                                                                             ^

           Examples: 11  Tried: 11  Errors: 0  Failures: 4
           FAIL
                 Exception: ExitFailure 1
                 Use -p '/docTest/' to rerun this test only.

           1 out of 5 tests failed (1.59s)

We have marked the suite as expected-test-failures for now.

[stevana]

Hmm, that's rather odd -- it seems that basic operations on doubles yield slightly different results, no clue why. Anyway, I think this package shouldn't be on stackage. I assume it's there only because quickcheck-state-machine depends on it?

[stevana]

I've just release quickcheck-state-machine-0.8.0 which doesn't depend on markov-chain-usage-model, so the latter can now be removed from stackage.