perlbug-followup at perl
Apr 8, 2012, 1:32 PM
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[perl #112350] panic: sv_setpvn with $SIG{ALRM} and split
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# New Ticket Created by Father Chrysostomos
# Please include the string: [perl #112350]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=112350 >
In <4F7C2642.40209 [at] profvince>, Vincent Pit wrote:
> On 04/04/2012 10:57, Jiří Václavík wrote:
> > Hello,
> >
> > after perl update I've hit on the following error message:
> >
> > panic: sv_setpvn called with negative strlen at bug.pl line 11.
> >
> > I don't exactly know what is wrong, but I've created short
> > synthetic script, which is attached. It works fine on perl5.12.4
> > and crash on perl5.14.2.
> >
>
> This can be reduced to :
>
> local $SIG{"ALRM"} = sub { "foo" =~ /o/ };
> alarm 1;
> split m{(\b)}, 'assdf ' x 5000000; # must run more than 1 sec.
>
> It started to panic between 5.12 and 5.13.3, and is still present in 5.15.8.
And then Nicholas Clark followed up with a couple of messages (<http://www.nntp.perl.org/group/perl.perl5.porters/;msgid=20120404144528.GE9069 [at] plum> and <http://www.nntp.perl.org/group/perl.perl5.porters/;msgid=20120404150046.GF9069 [at] plum>), suggesting that it has to do with PERL_ASYNC_CHECK.
This is a regression in 5.14. Can it be a 5.16 blocker?
---
Flags:
category=core
severity=low
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Site configuration information for perl 5.15.9:
Configured by sprout at Sun Mar 25 00:02:27 PDT 2012.
Summary of my perl5 (revision 5 version 15 subversion 9) configuration:
Snapshot of: eade71555e37e053d1aa5b29a45a0f06b3a3458f
Platform:
osname=darwin, osvers=10.5.0, archname=darwin-2level
uname='darwin pint.local 10.5.0 darwin kernel version 10.5.0: fri nov 5 23:20:39 pdt 2010; root:xnu-1504.9.17~1release_i386 i386 '
config_args='-Dusedevel -de'
hint=recommended, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=undef, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
optimize='-O3',
cppflags='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.2.1 (Apple Inc. build 5664)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /usr/lib
libs=-ldbm -ldl -lm -lutil -lc
perllibs=-ldl -lm -lutil -lc
libc=, so=dylib, useshrplib=false, libperl=libperl.a
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -L/usr/local/lib -fstack-protector'
Locally applied patches:
---
@INC for perl 5.15.9:
/usr/local/lib/perl5/site_perl/5.15.9/darwin-2level
/usr/local/lib/perl5/site_perl/5.15.9
/usr/local/lib/perl5/5.15.9/darwin-2level
/usr/local/lib/perl5/5.15.9
/usr/local/lib/perl5/site_perl
.
---
Environment for perl 5.15.9:
DYLD_LIBRARY_PATH (unset)
HOME=/Users/sprout
LANG=en_US.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/bin
PERL_BADLANG (unset)
SHELL=/bin/bash
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[perl #112350] panic: sv_setpvn with $SIG{ALRM} and split