5.005_63: close(STDERR) causes crash

[p5pRT]

Migrated from rt.perl.org#1883 (status was 'resolved')

Searchable as RT1883$

[p5pRT]

From johanv@nl.compuware.com

Closing STDERR causes perl to segfault when something needs to be
written to it (e.g. a warning).

Example​:

  close (STDERR);
  die ("Okay\n");

Perl Info

Site configuration information for perl 5.00563:

Configured by johanv at Mon Dec 13 11:05:45 MET 1999.

Summary of my perl5 (revision 5.0 version 5 subversion 63) configuration:
  Platform:
    osname=linux, osvers=2.2.13, archname=i686-linux
    uname='linux plume.nl.compuware.com 2.2.13 #1 thu oct 21 08:45:24 mest 1999 i686 unknown '
    config_args='-Dprefix=/usr -des'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef useperlio=undef d_sfio=undef
    use64bits=undef usemultiplicity=undef
  Compiler:
    cc='cc', optimize='-O2', gccversion=egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)
    cppflags='-Dbool=char -DHAS_BOOL -fno-strict-aliasing -I/usr/local/include'
    ccflags ='-Dbool=char -DHAS_BOOL -fno-strict-aliasing -I/usr/local/include'
    stdchar='char', d_stdstdio=define, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    alignbytes=4, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldb -ldl -lm -lc -lposix -lcrypt
    libc=/lib/libc-2.1.2.so, so=so, useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'

Locally applied patches:
    


@INC for perl 5.00563:
    /usr/lib/perl5/5.00563/i686-linux
    /usr/lib/perl5/5.00563
    /usr/local/lib/site_perl/5.00563/i686-linux
    /usr/local/lib/site_perl
    .


Environment for perl 5.00563:
    HOME=/home/johanv
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=.:/home/johanv/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin
    PERL_BADLANG (unset)
    SHELL=/bin/csh

[p5pRT]

From @gsar

On Mon, 13 Dec 1999 13​:18​:43 +0100, Johan Vromans CPWR wrote​:

Closing STDERR causes perl to segfault when something needs to be
written to it (e.g. a warning).

Example​:

close (STDERR);
die ("Okay\n");

Thanks, try this.

Sarathy
gsar@​ActiveState.com

Inline Patch

-----------------------------------8<-----------------------------------
Change 4680 by gsar@auger on 1999/12/16 08:26:00

	avoid coredump on diagnostics when STDERR is closed

Affected files ...

... //depot/perl/perl.h#210 edit

Differences ...

==== //depot/perl/perl.h#210 (text) ====
Index: perl/perl.h
--- perl/perl.h.~1~	Thu Dec 16 00:26:04 1999
+++ perl/perl.h	Thu Dec 16 00:26:04 1999
@@ -1868,6 +1868,7 @@
 
 #ifndef Perl_error_log
 #  define Perl_error_log	(PL_stderrgv			\
+				 && IoOFP(GvIOp(PL_stderrgv))	\
 				 ? IoOFP(GvIOp(PL_stderrgv))	\
 				 : PerlIO_stderr())
 #endif
End of Patch.