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[perl #77492] open $fh, ">", \*glob causes SEGV

From:
Father Chrysostomos
Date:
August 29, 2010 13:25
Subject:
[perl #77492] open $fh, ">", \*glob causes SEGV
Message ID:
rt-3.6.HEAD-5116-1283113539-1005.77492-75-0@perl.org
# New Ticket Created by  Father Chrysostomos 
# Please include the string:  [perl #77492]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=77492 >


Oops. I sent this first to p5p instead of perlbug!

The segmentation violation actually happens when the glob is stringified, and only if the $fh has been printed to.

This crashes as of perl5.10.0:

$ perl5.8.9 -le' open my $fh, ">", \*STDOUT; print $fh "hello"; print *STDOUT'
*main::STDOUT
$ perl5.13.4 -le' open my $fh, ">", \*STDOUT; print $fh "hello"; print *STDOUT'
Segmentation fault

I believe it was change 22315/4ce457a648 that caused this. A patch is forthcoming.

---
Flags:
   category=core
   severity=medium
---
Site configuration information for perl 5.13.4:

Configured by sprout at Fri Aug 20 23:24:53 PDT 2010.

Summary of my perl5 (revision 5 version 13 subversion 4 patch v5.13.4-16-g16c9153) configuration:
 Snapshot of: 9b47cddefd9b4a322e6382c8979ceeb2c3ac25c9
 Platform:
   osname=darwin, osvers=10.4.0, archname=darwin-2level
   uname='darwin pint.local 10.4.0 darwin kernel version 10.4.0: fri apr 23 18:28:53 pdt 2010; root:xnu-1504.7.4~1release_i386 i386 '
   config_args='-de -Dusedevel'
   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 -no-cpp-precomp -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
   optimize='-O3',
   cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp-precomp -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=/usr/lib/libc.dylib, 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 5.13.4:
   /usr/local/lib/perl5/site_perl/5.13.4/darwin-2level
   /usr/local/lib/perl5/site_perl/5.13.4
   /usr/local/lib/perl5/5.13.4/darwin-2level
   /usr/local/lib/perl5/5.13.4
   /usr/local/lib/perl5/site_perl
   .

---
Environment for perl 5.13.4:
   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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