Bug #36548 for pugs: GHC bugs

# Thu, 14 Jul 2005 02:28:53 -0700 "Simon Marlow" <simonmar@microsoft.com> - Ticket created [Reply] [Comment]

CC:	"Simon Peyton-Jones" <simonpj [...] microsoft.com>
Subject:	GHC bugs
Date:	Thu, 14 Jul 2005 10:28:28 +0100
To:	<pugsbugs [...] perl.org>, <malaire [...] users.sourceforge.net>, <autrijus [...] autrijus.org>
From:	"Simon Marlow" <simonmar [...] microsoft.com>

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Hi, I've been trying in vain over the last day or so to reproduce the following GHC bugs, both allegedly demonstrated by Pugs: [ 1226252 ] internal error: EVACUATED object entered! http://sourceforge.net/tracker/index.php?func=detail&aid=1222522&group_i d=8032&atid=108032 [ 1222522 ] scavenge_stack: weird activation record found on stack:37548 http://sourceforge.net/tracker/index.php?func=detail&aid=1222522&group_i d=8032&atid=108032 I checked out the exact revisions using SVN as specified in the bug reports, and I've tried various combinations of {1386,x86_64}, {Linux,FreeBSD}, {GHC 6.4, 6.4.1-STABLE}, {optimised,unoptimised}. I do indeed get test failures for the t/oo/desctruction.t test, but no crashes. For example, on the FreeBSD/x86/optimised build I just did: ~/local/pugs > GHCRTS=-H1m PERL_DL_NONLAZY=1 /usr/local/bin/perl "-I../../inc" "-I../inc" "-Iinc" "-MExtUtils::Command::MM" "-e" "ENV->{HARNESS_PERL} = q{/home/simonmar/local/pugs/blib/script/pugs}; @ARGV = map glob, @ARGV; ENV->{PERL6LIB} = q{/home/simonmar/local/pugs/blib6/lib}; test_harness(0, 'inc', '/home/simonmar/local/pugs/blib/lib', '/home/simonmar/local/pugs/blib/arch')" t/oo/destruction.t t/oo/destruction....NOK 5# Looks like you failed 2 tests of 6 t/oo/destruction....FAILED tests 4-5 Failed 2/6 tests, 66.67% okay Failed Test Stat Wstat Total Fail Failed List of Failed ------------------------------------------------------------------------ ------- t/oo/destruction.t 6 2 33.33% 4-5 Failed 1/1 test scripts, 0.00% okay. 2/6 subtests failed, 66.67% okay. I can vary the success rate by altering GHC's garbage collector options (e.g. the GHCRTS setting in the command above). At this point I'm stuck. I don't doubt there's a bug somewhere, but it's not showing itself for me. If someone can provide me with a temporary account on a machine that demonstrates the bug, that would be great. SSH key available on request. Even better if you could set me up with an account and a Pugs build tree all ready to go. I've spent too much time on this to give up now! Cheers, Simon

# Mon, 18 Jul 2005 11:12:11 -0700 Markus Laire <markus@laire.info> - Correspondence added [Reply] [Comment]

Subject:	Re: [perl #36548] GHC bugs
Date:	Mon, 18 Jul 2005 21:09:56 +0300
To:	perl6-compiler [...] perl.org, bugs-bitbucket [...] netlabs.develooper.com
From:	Markus Laire <markus [...] laire.info>

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Simon Marlow (via RT) kirjoitti: Show quoted text

> # New Ticket Created by "Simon Marlow" > # Please include the string: [perl #36548] > # in the subject line of all future correspondence about this issue. > # <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=36548 > > > > Hi, > > I've been trying in vain over the last day or so to reproduce the > following GHC bugs, both allegedly demonstrated by Pugs: > > [ 1226252 ] internal error: EVACUATED object entered! > http://sourceforge.net/tracker/index.php?func=detail&aid=1222522&group_i > d=8032&atid=108032 > > [ 1222522 ] scavenge_stack: weird activation record found on stack:37548 > http://sourceforge.net/tracker/index.php?func=detail&aid=1222522&group_i > d=8032&atid=108032

I seem to be able to reproduce this error using pugs r4916. Testing for the t/oo/destruction.t few times on a row gave these errors: pugs: internal error: TVAR object entered! pugs: internal error: EVACUATED object entered! pugs: internal error: scavenge_stack: weird activation record found on stack: 6432 pugs: internal error: scavenge_stack: weird activation record found on stack: 17516 pugs: internal error: scavenge_stack: weird activation record found on stack: 3348 pugs: internal error: scavenge_stack: weird activation record found on stack: 27812 So the test seems to give an error every time I run it, while the actual error varies a bit. Show quoted text

> At this point I'm stuck. I don't doubt there's a bug somewhere, but > it's not showing itself for me. > > If someone can provide me with a temporary account on a machine that > demonstrates the bug, that would be great. SSH key available on > request. Even better if you could set me up with an account and a Pugs > build tree all ready to go. > > I've spent too much time on this to give up now!

Unfortunately I don't know much about debugging nor how to setup such an account, if it's even possible on my computer. (I have SuSe 9.1 in a local network, with win98se-computer between internet and this local network.) -- Markus Laire

# Mon, 18 Jul 2005 11:12:12 -0700 The RT System itself - Status changed from 'new' to 'open'

# Mon, 18 Jul 2005 11:30:33 -0700 Markus Laire <markus@laire.info> - Correspondence added [Reply] [Comment]

Subject:	Re: [perl #36548] GHC bugs
Date:	Mon, 18 Jul 2005 21:28:17 +0300
To:	perl6-compiler [...] perl.org, bugs-bitbucket [...] netlabs.develooper.com
From:	Markus Laire <markus [...] laire.info>

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Just a quick addition to my previous message: I now got 1) --no error, just a failed test-- 2) --no error, just a failed test-- 3) pugs: internal error: scavenge_stack: weird activation record found on stack: 49900 4) pugs: internal error: EVACUATED object entered! 5) pugs: internal error: scavenge_stack: weird activation record found on stack: 9368 So this test doesn't seem to give error *every* time, but still quite often. I used command Show quoted text

> PERL_DL_NONLAZY=1 /usr/bin/perl "-I../../inc" "-I../inc" "-Iinc"

"-MExtUtils::Command::MM" "-e" "ENV->{HARNESS_PERL} = q{/home/malaire/omat/downloads/direct-devel-downloads/temp/pugs/blib/script/pugs}; @ARGV = map glob, @ARGV; ENV->{PERL6LIB} = q{/home/malaire/omat/downloads/direct-devel-downloads/temp/pugs/blib6/lib}; test_harness(0, 'inc', '/home/malaire/omat/downloads/direct-devel-downloads/temp/pugs/blib/lib', '/home/malaire/omat/downloads/direct-devel-downloads/temp/pugs/blib/arch')" t/oo/destruction.t -- Markus Laire