#4012: Compilation results are not deterministic -------------------------------------+------------------------------------- Reporter: kili | Owner: Type: bug | Status: new Priority: high | Milestone: 7.12.1 Component: Compiler | Version: 6.12.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Other | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Fuuzetsu): Another sample: parallel building {{{aeson-0.8.1.0}}}, we get sections like {{{ < 1e7b52dc510d1cf5d1c7dba94ff5093f < $cr4ZN :: Constr < 0d767d9de53af9e99867e765de72ede2 < $cr4ZO :: Constr < dc67d4c3fc9f3ce6c26b7594d8e6eae3 < $cr4ZP :: Constr < a2def0dbb719c6f881fc717fcb8298a4 < $cr4ZQ :: Constr < c6db659c87f4f30d7cd7837ade17c21a < $cr4ZR :: Constr < 0d876ce7c0dcbac035d3da6455b1dd5f < $cr4ZS :: Constr ---

bdb4c40eb8e399497201a7ebb5b21b8e $cr5fY :: Constr a1b0220e85ae58edc13e93774d8e283f $cr5fZ :: Constr 7d4faa76b1cc5a7319b59dca13194f80 $cr5g0 :: Constr 7fdf605be2abfeb55bab02c7c6b2124d $cr5g1 :: Constr 05b9af850c2c1ed35be735adcbdb7f6d $cr5g2 :: Constr bb94af6dd870df350419f5d32d4917cf $cr5g3 :: Constr }}}

which consequently screws up everything else. These are presumably generated by {{{Data}}} deriving. Attaching two sample interface files with the above, it was built with 7.10.1. In non-concurrent case, no issues. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/4012#comment:103 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler