[Haskell-cafe] Non-deterministic behaviour of aeson's parser

[Niklas Hambüchen]

Can't reproduce:

% ./aeson | sort | uniq -c
   2000 Right ()
% ./aeson | sort | uniq -c
   2000 Right ()
% ./aeson | sort | uniq -c
   2000 Right ()
% ./aeson | sort | uniq -c
   2000 Right ()
% ./aeson | sort | uniq -c
   2000 Right ()

Time 100:

% ./aeson | sort | uniq -c
 200000 Right ()


My packages:

% ghc-pkg list
/var/lib/ghc/package.conf.d
   Cabal-1.16.0
   array-0.4.0.1
   base-4.6.0.1
   bin-package-db-0.0.0.0
   binary-0.5.1.1
   bytestring-0.10.0.2
   containers-0.5.0.0
   deepseq-1.3.0.1
   directory-1.2.0.1
   filepath-1.3.0.1
   ghc-7.6.2
   ghc-prim-0.3.0.0
   haskell2010-1.1.1.0
   haskell98-2.0.0.2
   hoopl-3.9.0.0
   hpc-0.6.0.0
   integer-gmp-0.5.0.0
   old-locale-1.0.0.5
   old-time-1.1.0.1
   pretty-1.1.1.0
   process-1.1.0.2
   rts-1.0
   template-haskell-2.8.0.0
   time-1.4.0.1
   unix-2.6.0.1
/home/niklas/.ghc/x86_64-linux-7.6.2/package.conf.d
   HTTP-4000.2.8
   HUnit-1.2.5.2
   QuickCheck-2.6
   Xauth-0.1
   aeson-0.6.1.0
   ansi-terminal-0.6
   attoparsec-0.10.4.0
   attoparsec-binary-0.2
   base-unicode-symbols-0.2.2.4
   blaze-builder-0.3.1.1
   byteorder-1.0.4
   cipher-aes-0.1.8
   convertible-1.0.11.1
   cpphs-1.16
   dlist-0.5
   ghc-paths-0.1.0.9
   ghc-syb-utils-0.2.1.1
   hashable-1.2.0.6
   haskell-lexer-1.0
   haskell-src-exts-1.13.5
   hidapi-1.0
   hlint-1.8.44
   hscolour-1.20.3
   hspec-1.5.4
   hspec-expectations-0.3.2
   io-choice-0.0.3
   lifted-base-0.2.0.4
   monad-control-0.3.2.1
   mtl-2.1.2
   network-2.4.1.2
   parsec-3.1.3
   pretty-show-1.5
   primitive-0.5.0.1
   quickcheck-io-0.1.0
   random-1.0.1.1
   robot-1.0.1.1
   robot-1.1
   setenv-0.1.0
   stm-2.4.2
   storable-record-0.0.2.5
   syb-0.4.0
   text-0.11.3.0
   transformers-0.3.0.0
   transformers-base-0.4.1
   uniplate-1.6.10
   unordered-containers-0.2.3.1
   utility-ht-0.0.9
   vector-0.10.0.1
   vector-th-unbox-0.2.0.1
   xhb-0.5.2012.11.23
   zlib-0.5.4.1