[GHC] #2164: zmachine: internal error: task 0xa031e0: main thread 1 has been GC'd

Mon Mar 17 22:15:12 EDT 2008

#2164: zmachine: internal error: task 0xa031e0: main thread 1 has been GC'd
------------------------+---------------------------------------------------
    Reporter:  guest    |       Owner:          
        Type:  bug      |      Status:  new     
    Priority:  normal   |   Component:  Compiler
     Version:  6.8.2    |    Severity:  normal  
    Keywords:           |    Testcase:          
Architecture:  Unknown  |          Os:  Unknown 
------------------------+---------------------------------------------------
 So, I was recently looking at ZMachine, which is an emulator written in
 Haskell for the Infocom text adventures. It can be gotten from darcs here:
 <http://naesten.dyndns.org:8080/repos/ZMachine>.

 Anyway, I did some editing and installed and I tried it out on one of the
 text adventures SamB included in the repo:

 gwern at localhost:1013~/bin/ZMachine>zmachine Museum.z5
 [10:06PM]
 [finding abbrev 0 at $84][finding abbrev 1 at $8c][(0,"look"),(5,"map")]
 [(0,"look"),(5,"map")]
 zmachine: internal error: task 0xa031e0: main thread 1 has been GC'd
 (GHC version 6.8.2 for x86_64_unknown_linux)
 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 zsh: abort      zmachine Museum.z5

 In this case, one of the objects in the room was a map, so I typed in the
 sensible 'look map', and that is what happened. (In case you were
 wondering, 'look at map' works fine, but you can then go 'look map' and it
 crashes with the same exact error.)

 SamB doesn't remember putting in anything dangerous which he'd expect to
 do that. More importantly, when he runs from the same repo and tries out
 the same sequence he sees:
 21:57 < SamB> [finding abbrev 0 at $84][finding abbrev 1 at
 $8c][(0,"look"),(5,"map")]
 21:57 < SamB> [(0,"look"),(5,"map")]

 No crash. He says he's on a Pentium 4, i386 architecture, while I'm using
 a quad-core Intel (x86_64, ~amd64 Gentoo)

 ---
 SamB: Linux hydrogen 2.6.22-2-686 #1 SMP Fri Aug 31 00:24:01 UTC 2007 i686
 GNU/Linux

 gwern at localhost:1013~/bin/ZMachine>uname -a
 [10:07PM]
 Linux localhost 2.6.24-gentoo-r3 #6 SMP PREEMPT Fri Mar 14 21:40:34 EDT
 2008 x86_64 Intel(R) Core(TM)2 Quad CPU @ 2.40GHz GenuineIntel GNU/Linux

 gwern at localhost:1014~/bin/ZMachine>ghc-pkg list
 [10:12PM]
 /usr/lib64/ghc-6.8.2/package.conf:
     ALUT-2.1.0.0, Cabal-1.2.3.0, GLUT-2.1.1.1, HDBC-1.1.4,
     HDBC-odbc-1.1.4.0, HDBC-postgresql-1.1.4.0, HDBC-sqlite3-1.1.4.0,
     HGL-3.2.0.0, HTTP-3001.0.4, HUnit-1.2.0.0, OpenAL-1.3.1.1,
     OpenGL-2.2.1.1, QuickCheck-1.1.0.0, Stream-0.2.2, X11-1.4.1,
     X11-xft-0.2, array-0.1.0.0, arrows-0.3, base-3.0.1.0,
     bytestring-0.9.0.1, bytestring-0.9.0.4, bzlib-0.4.0.1,
     cairo-0.9.12.1, cgi-3001.1.5.2, containers-0.1.0.1, cpphs-1.5,
     directory-1.0.0.0, fgl-5.4.1.1, filepath-1.1.0.0, fingertree-0.0,
     (ghc-6.8.2), glade-0.9.12.1, glib-0.9.12.1, gtk-0.9.12.1,
     gtkglext-0.9.12.1, harp-0.2, haskell-src-1.0.1.1,
     haskell-src-exts-0.2, haskell98-1.0.1.0, hpc-0.5.0.0, hscolour-1.9,
     hslogger-1.0.4, hsql-1.7, hsql-mysql-1.7, hsql-odbc-1.7,
     hsql-postgresql-1.7, hsql-sqlite3-1.7, html-1.0.1.1, hxt-7.5,
     iconv-0.4, mtl-1.1.0.0, network-2.1.0.0, old-locale-1.0.0.0,
     old-time-1.0.0.0, packedstring-0.1.0.0, parallel-1.0.0.0,
     parsec-2.1.0.0, polyparse-1.1, pretty-1.0.0.0, process-1.0.0.0,
     random-1.0.0.0, readline-1.0.1.0, regex-base-0.72.0.1,
     regex-compat-0.71.0.1, regex-posix-0.72.0.2, rts-1.0,
     soegtk-0.9.12.1, stm-2.1.1.0, svgcairo-0.9.12.1, tagsoup-0.4,
     template-haskell-2.2.0.0, time-1.1.2.0, unix-2.3.0.0,
     utf8-string-0.2, uulib-0.9.5, xhtml-3000.0.2.2, xmonad-0.6,
     xmonad-contrib-0.6
 /home/gwern/.ghc/x86_64-linux-6.8.2/package.conf:
     AGI-1.1.1, ArrayRef-0.1, AvlTree-2.4, CC-delcont-0.2,
     COrdering-2.1, Cabal-1.3.3, Cabal-1.3.6, Cabal-1.3.7, Chart-0.5,
     ChasingBottoms-1.2.2, Codec-Compression-LZF-0.2, ConfigFile-1.0.4,
     Conjure-0.1, ContArrow-0.0.3, Crypto-4.1.0, DBus-0.1,
     DeepArrow-0.0.1, DisTract-0.2.5, EdisonAPI-1.2.1,
     EdisonCore-1.2.1.1, Encode-0.7, Etherbunny-0.3, FileManip-0.3.1,
     Finance-Quote-Yahoo-0.4.1, FiniteMap-0.1, GLFW-0.2, GLUT-2.1.1.1,
     HAppS-Data-0.9.1, HAppS-IxSet-0.9.1, HAppS-Server-0.9.1,
     HAppS-State-0.9.1, HAppS-Util-0.9.1, HCL-1.2, HFuse-0.1,
     HGL-3.2.0.0, HList-0.1, {HPDF-1.3}, HSH-1.2.5, HStringTemplate-0.1,
     HTF-0.1, HTTP-3001.0.0, HTTP-Simple-0.1, HaLex-1.1, HaXml-1.13.3,
     HaXml-1.19.2, HsJudy-0.1, HsJudy-0.1.1, HsOpenSSL-0.3.1,
     HsSyck-0.41, HsSyck-0.42, IFS-0.1.1, IOSpec-0.1.1, Imlib-0.1,
     IndentParser-0.2.1, ListLike-1.0.1, MaybeT-0.1.1, MissingH-1.0.0,
     NewBinary-0.1, OpenGL-2.2.1.1, PArrows-0.1, PostgreSQL-0.2,
     Postmaster-0.1, QuickCheck-2.0, RJson-0.1, Ranged-sets-0.1.1,
     Safe-0.1, Shellac-0.9.1, Shellac-readline-0.9, TV-0.2,
     TypeCompose-0.3, TypeCompose-0.4, {Unixutils-1.14}, X11-1.4.1,
     X11-1.4.1.20080127, X11-xft-0.2, YamlReference-0.6, ZFS-0.0,
     anydbm-1.0.4, anydbm-1.0.5, base64-string-0.1, bencode-0.3,
     binary-0.4.1, binary-strict-0.1, binary-strict-0.2.1,
     binary-strict-0.2.2, binary-strict-0.3.0, bio-0.2, bio-0.3.3,
     bktrees-0.2.1, blockio-0.0-2006-02-03, bytestring-0.9.0.1,
     bytestring-0.9.0.4, cgi-3001.1.5.1, cgi-3001.1.5.2,
     cgi-undecidable-3000.0.0, child-0.0-2005-02-14, chunks-2007.4.18,
     condorcet-0.0.1, csv-0.1.1, curl-1.3.2, dataenc-0.10.2,
     dbus-haskell-0.1, {debian-1.2}, denominate-0.4.1, derive-0.1,
     derive-0.1.1, dimensional-0.7.2, dlist-0.4, dsp-0.2.1,
     encoding-0.3, event-list-0.0.5, exif-3000.0.0, fec-0.1.1,
     filepath-1.1.0.0, fingertree-0.0, fixpoint-0.1, flock-0.1,
     folkung-2.3, frag-1.1, fst-0.9, ftphs-1.0.4, gal-1.0, gd-3000.4.0,
     genericserialize-0.1, greencard-3.0.1, greencard-lib-3.0.1,
     haddock-2.0.0.0, haddock-2.1.0, halfs-0.2, harp-0.2.1, harpy-0.4,
     haskell-src-exts-0.2.1, haskelldb-0.11, haxr-3000.0.1,
     hera-ajaxgui-2.1-dev, hera-engine-2.1-dev, hera-prelude-2.1-dev,
     hfov-1, hinotify-0.2, hinstaller-2007.5.13, hmarkup-3000.0.1,
     hmatrix-0.2.0.0, hopenssl-0.0-2005-02-14, hosc-0.1, hosc-0.2,
     hs-fltk-0.2.5, hsc3-0.2, hscurses-1.1, hscurses-1.2, hscurses-1.3,
     hsdns-1.1, hsemail-1.1, hslogger-1.0.2, hslua-0.2, hsntp-0.1,
     hsp-0.2, hspr-sh-0.3, hspread-0.2, hstats-0.2, hstringtemplate-0.1,
     html-1.0.1.1, hybrid-2.0, i18n-0.2, i18n-0.3, idris-0.0.1,
     infix-0.1, interlude-0.1, ipprint-0.3, irc-0.4, ivor-0.1.5,
     lax-0.0.0, lazysmallcheck-0.1, libGenI-0.16, libmpd-0.1.3,
     loch-0.2, magic-1.0.7, markov-chain-0.0.1, memcached-0.1,
     mersenne-random-0.1, metaplug-0.1.1, midi-0.0.4, miniplex-0.2.2,
     monad-param-0.0.2, monadLib-3.3.0, monadenv-0.0-2005-02-14,
     mtlparse-0.0.0.5, nano-md5-0.1.1, network-bytestring-0.1.1,
     network-bytestring-0.1.1.2, non-negative-0.0.1, numbers-2007.9.25,
     oeis-0.1, parse-dimacs-1.0, parsedate-3000.0.0, pcap-0.4.2,
     pcre-light-0.2.1, pcre-light-0.3, plugins-1.1, polyparse-1.1,
     popenhs-1.0.0, postmaster-0.1, powermate-0.1, pqc-0.2,
     propgrid-0.1, pugs-HsSyck-0.2, pugs-HsSyck-0.41, pugs-hsregex-1.0,
     pureMD5-0.1.0, pureMD5-0.1.1, rbr-0.7, rbr-0.8.3, reactive-0.4,
     regex-base-0.72.0.1, regex-base-0.93.1, regex-posix-0.72.0.2,
     regex-posix-0.93.1, rss-3000.0.1, safecopy-0.3, scgi-0.1,
     selenium-0.2.2, sessions-2008.2.20, shell-pipe-0.1, simpleargs-0.1,
     smallcheck-0.2, smallcheck-0.2.1, stream-fusion-0.1.1, strict-0.3,
     strict-concurrency-0.1, stringsearch-0.2, supercollider-ht-0.0,
     syb-with-class-0.4, tagsoup-0.3, tagsoup-0.4, tagsoup-0.5,
     tar-0.1.1.1, template-0.1.1.1, terminfo-0.1, type-int-0.3,
     type-level-0.1, uniplate-1.0.1, unix-compat-0.1.2.1,
     unix-pty-light-0.1, value-supply-0.1, vty-3.0.0, whim-0.1,
     wl-pprint-1.0, xhtml-3000.0.2.1, xhtml-3000.0.2.2, xmonad-0.6,
     xmonad-contrib-0.6, xsact-1.6, zlib-0.4.0.2

 --
 gwern

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2164>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler