[GHC] #11574: schedule: re-entered unsafely on minimal hello world program on arm

[GHC]

#11574: schedule: re-entered unsafely on minimal hello world program on arm
-------------------------------------+-------------------------------------
           Reporter:  andrewufrank   |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 i installed ghc 7.10.3 from jessie-backports (together with the
 corresponding LLVM 1:3.5.2.3~bpo8+2)
 and get for the minimal main = putStrLn "hello" program the error message
 {{{testthree: schedule: re-entered unsafely.
    Perhaps a 'foreign import unsafe' should be 'safe'?
 }}

 i am not certain if this is related: cabal install for the same minimal
 program (with a minimal cabal file) hangs. cabal install -v gives

 {{{
 /home/frank/.cabal/setup-exe-cache/setup-Simple-Cabal-1.22.5.0-arm-linux-
 ghc-7.10.3
 configure --verbose=2 --ghc --prefix=/home/frank/.cabal
 --bindir=/home/frank/.cabal/bin --libdir=/home/frank/.cabal/lib
 --libsubdir=arm-linux-ghc-7.10.3/testthree-0.0.6-3AgAf9bDkWJGZdbGLvO875
 --libexecdir=/home/frank/.cabal/libexec --datadir=/home/frank/.cabal/share
 --datasubdir=arm-linux-ghc-7.10.3/testthree-0.0.6
 --docdir=/home/frank/.cabal/share/doc/arm-linux-ghc-7.10.3/testthree-0.0.6
 --htmldir=/home/frank/.cabal/share/doc/arm-linux-
 ghc-7.10.3/testthree-0.0.6/html
 --haddockdir=/home/frank/.cabal/share/doc/arm-linux-
 ghc-7.10.3/testthree-0.0.6/html
 --sysconfdir=/home/frank/.cabal/etc --user
 --extra-prog-path=/home/frank/.cabal/bin
 --dependency=base=base-4.8.2.0-2f1f71a7fcf013cd47fd21f489064f9a
 --disable-tests --exact-configuration --disable-benchmarks
 Redirecting build log to {handle:
 /home/frank/.cabal/logs/testthree-0.0.6.log}
 }}}
 any comment how this can be fixed?
 thank you - a running 7.10.3 for armhf is a great achievement!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11574>
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