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Nov 23, 2009, 7:25 AM
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[perl #70748] threads panic in del_backref
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# New Ticket Created by "Jerry D. Hedden"
# Please include the string: [perl #70748]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=70748 >
This is a bug report for perl from jdhedden [at] cpan,
generated with the help of perlbug 1.39 running under perl 5.11.0.
-----------------------------------------------------------------
[Please describe your issue here]
The following:
use threads;
sub foo {
return (sub { });
}
my $bar = threads->create(\&foo)->join();
threads->create(sub { })->join();
produces:
panic: del_backref during global destruction.
This bug was introduced with change 34354
(commit a49ba3fcbe357fbacf7b9898df08daa2cbdfc8c4)
Once fixed, the following can be added to t/op/threads.t:
# Test we don't get:
# panic: del_backref during global destruction.
fresh_perl_is(<<'EOI', 'ok', { }, 'Direct lookup hash for ->isa()');
use threads;
sub foo { return (sub { }); }
my $bar = threads->create(\&foo)->join();
threads->create(sub { })->join();
print "ok";
EOI
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=medium
---
Site configuration information for perl 5.11.0:
Configured by Jerry at Mon Nov 23 09:24:58 EST 2009.
Summary of my perl5 (revision 5 version 11 subversion 0 patch 34354)
configuration:
Platform:
osname=cygwin, osvers=1.5.25(0.15642), archname=cygwin-thread-multi-64int
uname='cygwin_nt-5.1 pn100-02-2-364p 1.5.25(0.15642) 2008-06-12
19:34 i686 cygwin '
config_args='-de -Dusedevel -Dversiononly=no -Dinstallusrbinperl
-Uusemallocwrap -Duse64bitint -Dusethreads -Dinc_version_list=none
-Dnoextensions=IPC/SysV Sys/Syslog Devel/DProf Devel/Peek re GDBM_File
NDBM_File ODBM_File Text/Soundex attrs Math/BigInt/FastCalc Time/Piece
-A append:ccflags= -DNO_MATHOMS -A define:optimize=-Os -pipe
-funit-at-a-time -march=pentium4 -mfpmath=sse -mieee-fp -mmmx -msse
-msse2'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=undef, uselongdouble=undef
usemymalloc=y, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__
-DNO_MATHOMS -fno-strict-aliasing -pipe',
optimize='-Os -pipe -funit-at-a-time -march=pentium4 -mfpmath=sse
-mieee-fp -mmmx -msse -msse2',
cppflags='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -DNO_MATHOMS
-fno-strict-aliasing -pipe'
ccversion='', gccversion='3.4.4 (cygming special, gdc 0.12, using
dmd 0.125)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long long', ivsize=8, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='g++', ldflags =' -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -s -L/usr/local/lib'
libpth=/usr/local/lib /usr/lib /lib
libs=-lgdbm -ldl -lcrypt -lgdbm_compat
perllibs=-ldl -lcrypt
libc=/usr/lib/libc.a, so=dll, useshrplib=true, libperl=cygperl5_11_0.dll
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' -s'
cccdlflags=' ', lddlflags=' --shared -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -s -L/usr/local/lib'
Locally applied patches:
DEVEL
---
@INC for perl 5.11.0:
lib
/usr/lib/perl5/5.11.0/cygwin
/usr/lib/perl5/5.11.0
/usr/lib/perl5/site_perl/5.11.0/cygwin
/usr/lib/perl5/site_perl/5.11.0
.
---
Environment for perl 5.11.0:
CYGWIN=ntsec
HOME=/home/jhedden
LANG=C
LANGUAGE=C
LC_ALL=C
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/jhedden/bin:/usr/local/src/perl/bin:/link/work/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/c/Program
Files/WiX:/c/djgpp/bin:/c/bb/tools/apache-ant-1.6.5/bin:/c/Program
Files/nant-0.85/bin:/c/bb/tools/jse5/bin:/c/dev-cpp/bin:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/system32/WBEM:/c/blp/API/dde:/c/blp/API:/c/oracle/ora92/bin:/c/Program
Files/Oracle/jre/1.3.1/bin:/c/Program
Files/Oracle/jre/1.1.8/bin:/c/Program
Files/Hummingbird/Connectivity/7.10/Accessories:/usr/bin:/c/Program
Files/Windows Imaging/:.
PERLIO=perlio
PERL_BADLANG (unset)
SHELL (unset)
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