#10584: Installation of SFML failed -------------------------------------+------------------------------------- Reporter: SoleSoul | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.4 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * version: 7.10.1 => 7.8.4 Comment: Here is a test to reproduce the problem: {{{#!haskell module T10584 where data Transform = Transform { m00 :: !Float, m10 :: !Float, m20 :: !Float , m01 :: !Float, m11 :: !Float, m21 :: !Float , m02 :: !Float, m12 :: !Float, m22 :: !Float } abs_ (Transform a00 a01 a02 a03 a04 a05 a06 a07 a08) = (Transform (abs a00) (abs a01) (abs a02) (abs a03) (abs a04) (abs a05) (abs a06) (abs a07) (abs a08)) }}} Fails with 7.8.4 and higher, but not with 7.6.3. {{{ $ ghc-7.8.4 T10584.hs -fsimpl-tick-factor=200 -O -fforce-recomp [1 of 1] Compiling T10584 ( T10584.hs, T10584.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.8.4 for x86_64-unknown-linux): Simplifier ticks exhausted When trying UnfoldingDone $j_s1vT{v} [lid] To increase the limit, use -fsimpl-tick-factor=N (default 100) If you need to do this, let GHC HQ know, and what factor you needed To see detailed counts use -ddump-simpl-stats Total ticks: 73282 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10584#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler