[GHC] #12737: T12227 is failing on ghc-8.0

[GHC]

#12737: T12227 is failing on ghc-8.0
-------------------------------------+-------------------------------------
           Reporter:  ezyang         |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.0.2
          Component:  Visual         |           Version:  8.0.1
  Haskell                            |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Runtime
  Unknown/Multiple                   |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Fresh validate from 5eab189b329344630f76b8751c1289ce480ca46b on x86_64
 Linux:

 {{{
 =====> T12227(normal) 1 of 1 [0, 0, 0]
 cd ./perf/compiler &&  "/home/hs01/ezyang/ghc-validate/inplace/test
 spaces/ghc-stage2" -c T12227.hs -fforce-recomp -dno-debug-output -fshow-
 warning-groups -no-user-package-db -rtsopts -fno-warn-tabs -fno-warn-
 missed-specialisations -fno-ghci-history  -O2 -ddump-hi -ddump-to-file
 +RTS -M1G +RTS -V0 -tT12227.comp.stats --machine-readable -RTS >
 T12227.comp.stderr 2>&1
 bytes allocated value is too high:
     Expected    T12227(normal) bytes allocated: 1822822016 +/-5%
     Lower bound T12227(normal) bytes allocated: 1731680915
     Upper bound T12227(normal) bytes allocated: 1913963117
     Actual      T12227(normal) bytes allocated: 9256914200
     Deviation   T12227(normal) bytes allocated:      407.8 %
 *** unexpected stat test failure for T12227(normal)
 }}}

 That's a pretty awful regression, if it is real.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12737>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler