id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
5072,Segfault on OS X in interpreted code,nominolo,,"I'm getting reproducable segfaults/GC panics when doing the following:

{{{
$ ghci -package ghc Scion/Config.hs 
GHCi, version 7.0.2: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.3.0.2 ... linking ... done.
Loading package containers-0.4.0.0 ... linking ... done.
Loading package filepath-1.2.0.0 ... linking ... done.
Loading package old-locale-1.0.0.2 ... linking ... done.
Loading package old-time-1.0.0.6 ... linking ... done.
Loading package unix-2.4.2.0 ... linking ... done.
Loading package directory-1.1.0.0 ... linking ... done.
Loading package pretty-1.0.1.2 ... linking ... done.
Loading package process-1.0.1.5 ... linking ... done.
Loading package Cabal-1.10.1.0 ... linking ... done.
Loading package bytestring-0.9.1.10 ... linking ... done.
Loading package ghc-binary-0.5.0.2 ... linking ... done.
Loading package bin-package-db-0.0.0.0 ... linking ... done.
Loading package hpc-0.5.0.6 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package ghc-7.0.2 ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
[1 of 6] Compiling Scion.Types.ExtraInstances ( Scion/Types/ExtraInstances.hs, interpreted )
[2 of 6] Compiling Scion.Types.Notes ( Scion/Types/Notes.hs, interpreted )
[3 of 6] Compiling Scion.Types.DefinitionSites ( Scion/Types/DefinitionSites.hs, interpreted )
[4 of 6] Compiling Scion.Types.Session ( Scion/Types/Session.hs, interpreted )
[5 of 6] Compiling Scion.Types      ( Scion/Types.hs, interpreted )
[6 of 6] Compiling Scion.Config     ( Scion/Config.hs, interpreted )
Ok, modules loaded: Scion.Config, Scion.Types, Scion.Types.Session, Scion.Types.Notes, Scion.Types.DefinitionSites, Scion.Types.ExtraInstances.
*Scion.Config> test_config 
Loading package time-1.2.0.3 ... linking ... done.
Loading package attoparsec-0.8.5.0 ... linking ... done.
Loading package deepseq-1.1.0.2 ... linking ... done.
Loading package text-0.11.0.5 ... linking ... done.
Loading package blaze-builder-0.3.0.0 ... linking ... done.
Loading package binary-0.5.0.2 ... linking ... done.
Loading package bytestring-show-0.3.4 ... linking ... done.
Loading package hashable-1.1.1.0 ... linking ... done.
Loading package transformers-0.2.2.0 ... linking ... done.
Loading package mtl-2.0.1.0 ... linking ... done.
Loading package monads-fd-0.2.0.0 ... linking ... done.
Loading package syb-0.3 ... linking ... done.
Loading package unordered-containers-0.1.2.0 ... linking ... done.
Loading package primitive-0.3.1 ... linking ... done.
Loading package vector-0.7.0.1 ... linking ... done.
Loading package aeson-0.3.2.1 ... linking ... done.
Loading package multiset-0.2.1 ... linking ... done.
key ""filename"" not present
*Scion.Config> ghc: internal error: evacuate: strange closure type 1085528
    (GHC version 7.0.2 for x86_64_apple_darwin)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Abort trap
}}}

After running `test_config` it takes a few seconds for the panic to occur.  If I compile the first five files, the panic seems to disappear, so my guess it is some problem with interpreted code:

{{{
$ ghc --make -package ghc Scion.Types
...
$ ghci -package ghc Scion/Config.hs
*Scion.Config> test_config
-- no segfault
*Scion.Config> :q
Leaving GHCi.

$ rm Scion/Types.hi
$ rm Scion/Types.o
$ ghci -package ghc Scion/Config.hs
*Scion.Config> test_config
... (loading packages) ...
*Scion.Config> ghc: internal error: evacuate: strange closure type 66664
    (GHC version 7.0.2 for x86_64_apple_darwin)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Abort trap
}}}

I attached the source files.  You'll need additional packages, though.  See the full output above for which ones these are.",bug,closed,high,7.4.2,Compiler,7.0.3,worksforme,,pho@… anton.nik@… gwright,Unknown/Multiple,Unknown/Multiple,Runtime crash,Unknown,,,,