| Subject: | Syntax error in finally block can cause perl to segfault |
| Date: | Mon, 13 Sep 2010 18:42:50 +0100 |
| To: | bug-Try-Tiny [...] rt.cpan.org |
| From: | Andrew Clegg <andrew.clegg [...] gmail.com> |
I have found a situation where a syntax error in a finally block can
cause perl to segfault, even if just run with perl -c.
A file to reproduce this (Broken.pm) is appended to the end of this
message. The syntax error is on line 14 -- the extra semicolon after
the chdir() call. If I comment out all the lines relating to try and
finally, leaving just lines 14 and 15 to run, I get a normal syntax
error message.
To demonstrate the problem, just
perl -c Broken.pm
The same thing happens if you 'use Broken' and create a new Broken object.
OS: Centos 5.4, Linux x86_64 2.6.18-164.15.1.el5
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.9-42.0.3.elsmp, archname=x86_64-linux
uname='linux fletcher 2.6.9-42.0.3.elsmp #1 smp fri oct 6 06:28:26
cdt 2006 x86_64 x86_64 x86_64 gnulinux '
config_args='-Doptimize=-g -Dprefix=/cath/opt/perl-5.8.8-centos4 -de'
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=define use64bitall=define uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-DDEBUGGING -fno-strict-aliasing -pipe
-Wdeclaration-after-statement -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
optimize='-g',
cppflags='-DDEBUGGING -fno-strict-aliasing -pipe
-Wdeclaration-after-statement -I/usr/local/include
-I/usr/include/gdbm'
ccversion='', gccversion='3.4.6 20060404 (Red Hat 3.4.6-10)',
gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.3.4.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.3.4'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Modules in use:
Try::Tiny 0.06
Moose 1.09
Cwd 3.3
*** Broken.pm ***
package Broken;
use Moose;
use Cwd;
use Try::Tiny;
sub _process {
my $self = shift;
my $orig_dir = cwd;
try {
}
finally {
chdir( '/' );
or warn( "Failed to change back to $orig_dir" );
};
}
sub BUILD {
my $self = shift;
$self->_process;
}
no Moose;
__PACKAGE__->meta->make_immutable;
1;