[GHC] #14490: TTG Snags

[GHC]

#14490: TTG Snags
-------------------------------------+-------------------------------------
        Reporter:  alanz             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14482            |  Differential Rev(s):
       Wiki Page:                    |
  ImplementingTreesThatGrow          |
-------------------------------------+-------------------------------------

Comment (by alanz):

 And here is an interesting result from validation with my branch
 `wip/ttg6-unrevert-2017-11-22`

 {{{
 =====> haddock.base(normal) 1 of 3 [0, 0, 0]
 bytes allocated value is too low:
 (If this is because you have improved GHC, please
 update the test so that GHC doesn't regress again)
     Expected    haddock.base(normal) bytes allocated: 19694554424 +/-5%
     Lower bound haddock.base(normal) bytes allocated: 18709826702
     Upper bound haddock.base(normal) bytes allocated: 20679282146
     Actual      haddock.base(normal) bytes allocated: 17315438736
     Deviation   haddock.base(normal) bytes allocated:       -12.1 %
 *** unexpected stat test failure for haddock.base(normal)
 =====> haddock.Cabal(normal) 2 of 3 [0, 0, 0]
 bytes allocated value is too low:
 (If this is because you have improved GHC, please
 update the test so that GHC doesn't regress again)
     Expected    haddock.Cabal(normal) bytes allocated: 20104611952 +/-5%
     Lower bound haddock.Cabal(normal) bytes allocated: 19099381354
     Upper bound haddock.Cabal(normal) bytes allocated: 21109842550
     Actual      haddock.Cabal(normal) bytes allocated: 18233466752
     Deviation   haddock.Cabal(normal) bytes allocated:        -9.3 %
 *** unexpected stat test failure for haddock.Cabal(normal)
 =====> haddock.compiler(normal) 3 of 3 [0, 0, 0]
 bytes allocated value is too low:
 (If this is because you have improved GHC, please
 update the test so that GHC doesn't regress again)
     Expected    haddock.compiler(normal) bytes allocated: 102142130576
 +/-10%
     Lower bound haddock.compiler(normal) bytes allocated:  91927917518
     Upper bound haddock.compiler(normal) bytes allocated: 112356343634
     Actual      haddock.compiler(normal) bytes allocated:  51327433048
     Deviation   haddock.compiler(normal) bytes allocated:        -49.7 %
 *** unexpected stat test failure for haddock.compiler(normal)

 Unexpected results from:
 TEST="haddock.Cabal haddock.base haddock.compiler"

 SUMMARY for test run started at Thu Nov 23 07:28:46 2017 UTC
  0:00:00 spent to go through
        3 total tests, which gave rise to
        3 test cases, of which
        0 were skipped

        0 had missing libraries
        0 expected passes
        0 expected failures

        0 caused framework failures
        0 caused framework warnings
        0 unexpected passes
        0 unexpected failures
        3 unexpected stat failures

 Unexpected stat failures:
    perf/haddock/haddock.base.run      haddock.base [stat too good]
 (normal)
    perf/haddock/haddock.Cabal.run     haddock.Cabal [stat too good]
 (normal)
    perf/haddock/haddock.compiler.run  haddock.compiler [stat too good]
 (normal)
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14490#comment:35>
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