mlitchard@kether:~/projects/perf/autoperf/session_creator/newtry2/strings$ ghci -v GHCi, version 6.12.3: http://www.haskell.org/ghc/ :? for help Glasgow Haskell Compiler, Version 6.12.3, for Haskell 98, stage 2 booted by GHC version 6.8.2 ghci was working a few weeks ago. I may have hidden a package or installed one to cause this segfault now. Could someone help me troubleshoot what is causing this? I did a stack trace but could not discern any useful info from it. Using binary package database: /usr/local/lib/ghc-6.12.3/package.conf.d/package.cache Using binary package database: /home/mlitchard/.ghc/x86_64-linux-6.12.3/package.conf.d/package.cache hiding package parsec-2.1.0.1 to avoid conflict with later version parsec-3.1.0 hiding package base-3.0.3.2 to avoid conflict with later version base-4.2.0.2 wired-in package ghc-prim mapped to ghc-prim-0.2.0.0-5da421112969a971aa3433fdf154b37a wired-in package integer-gmp mapped to integer-gmp-0.2.0.1-67f3940ec8fd509683668f40451c9ca1 wired-in package base mapped to base-4.2.0.2-cc69ae37cc080e111e11df0109986bd2 wired-in package rts mapped to builtin_rts wired-in package haskell98 mapped to haskell98-1.0.1.1-4d2891ad99eae334ff8234bcfbddce06 wired-in package template-haskell mapped to template-haskell-2.4.0.1-e9e9c63092746bd4a3f64cc37ddb1e06 wired-in package dph-seq mapped to dph-seq-0.4.0-5ed11291726022ff6bb22049478399e8 wired-in package dph-par mapped to dph-par-0.4.0-5a5a24e36763903b0b26f03d8d510a95 Hsc static flags: -static Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Segmentation fault