perlbug-followup at perl
Oct 15, 2010, 7:54 AM
Post #1 of 3
(276 views)
Permalink
|
|
[perl #78398] eval STRING compilation failure breaks overloading
|
|
# New Ticket Created by hdp [at] glaive
# Please include the string: [perl #78398]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=78398 >
This is a bug report for perl from hdp [at] glaive,
generated with the help of perlbug 1.39 running under perl 5.10.1.
-----------------------------------------------------------------
[Please describe your issue here]
Using eval STRING inside an overload method causes stack corruption when STRING
has compile-time errors.
Commenting out the eval makes it work; or changing it to just eval "require Foo::Bar"
putting it inside { local $@; eval ... } makes it abort:
perl: pp_ctl.c:2073: Perl_pp_leaveloop: Assertion `(((cx)->cx_u.cx_subst.sbu_type & 0xC) == 0x4)' fail.
perl 5.10.1 and 5.8.9 segfault here instead of aborting.
Any compile-time error works, like "BEGIN { !@#!@# }" or "use Foo::Bar"
use overload (q{""} => 'str');
sub new { bless {} }
sub str {
eval "BEGIN { require Foo::Bar }";
return 1;
}
main->new() . "";
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=high
---
Site configuration information for perl 5.10.1:
Configured by hdp at Sun Apr 11 07:47:29 EDT 2010.
Summary of my perl5 (revision 5 version 10 subversion 1) configuration:
Platform:
osname=linux, osvers=2.6.31.5-linode21, archname=i686-linux
uname='linux glaive 2.6.31.5-linode21 #1 smp mon oct 26 18:17:01 utc 2009 i686 gnulinux '
config_args='-de -Dprefix=/home/hdp/perl5/perlbrew/perls/perl-5.10.1'
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-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.3.3', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/lib64
libs=-lnsl -ldb -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'
Locally applied patches:
---
@INC for perl 5.10.1:
/home/hdp/perl5/perlbrew/perls/perl-5.10.1/lib/5.10.1/i686-linux
/home/hdp/perl5/perlbrew/perls/perl-5.10.1/lib/5.10.1
/home/hdp/perl5/perlbrew/perls/perl-5.10.1/lib/site_perl/5.10.1/i686-linux
/home/hdp/perl5/perlbrew/perls/perl-5.10.1/lib/site_perl/5.10.1
.
---
Environment for perl 5.10.1:
HOME=/home/hdp
LANG=en_US.UTF8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/hdp/perl5/perlbrew/bin:/home/hdp/perl5/perlbrew/perls/current/bin:/home/hdp/bin:/home/hdp/local/bin:/home/hdp/local/sbin:/var/lib/gems/1.8/bin:/home/hdp/.inker/perl/bin:/home/hdp/bin:/home/hdp/local/bin:/home/hdp/local/sbin:/var/lib/gems/1.8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PERL_BADLANG (unset)
PERL_CPANM_OPT=--prompt --skip-installed --mirror http://cpan.cpantesters.org
SHELL=/usr/bin/zsh
|
