Bug#469058: libc6: New version of libc6 hangs SBCL
Rupert Swarbrick a écrit :
After upgrading to 2.7-9 of libc6 in unstable, SBCL became extremely
prone to crashing
randomly (i.e. 5-10 source files compiled of the SBCL CVS code before a
100% CPU hang which
was only killable with -s 9.
Could you please give a way to reproduce the bug? I know nothing about
SBCL, so a list of commands to execute or a shell script would be nice.
Of course, sorry. Probably the easiest option is to get sbcl and darcs
(the version control system). It doesn't appear to matter which version
of sbcl - I've had the problem with 1.0.12 up to 1.0.14.
Then get clbuild (which is a little shell script which can among other
things get and build a new copy of sbcl, which is a project large enough
to guarantee the hang on my computer at least) using
darcs get http://common-lisp.net/project/clbuild/clbuild
Chmod +x the clbuild script inside the folder and cd inside and run
./clbuild buildsbcl
Hopefully (!) your system should hang at 100% CPU with the sbcl process
ignoring SIGTERM. Sorry about the involved duplication process - it's
just that you need to compile quite a bit of code before the seemingly
"random" bug strikes.
I am able to reproduce the bug, except that here the sbcl process hangs
with 0% CPU.
Could you please try to narrow the problem to a single libc6 version?
Older versions are available on snapshot.debian.net.
Could you let me know a way to convince dpkg to let me do that? Since
you have to up/downgrade a dependent package at the same time, and I'm a
bit scared of using --force-all on libc6 on my only computer! (Or am I
being needlessly cautious?)
Theoretically if you upgrade/downgrade all libc6 related packages
(libc6-dev, libc6-i686, ...) at the same time it should work.
Anyway now that I am able to reproduce the problem, I can do that myself.
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@debian.org | aurelien@aurel32.net
`- people.debian.org/~aurel32 | www.aurel32.net
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