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Id: 107943
Status: new
Priority: 0/
Queue: bignum

Owner: Nobody in particular
Requestors: ehochbaum [...]

Bug Information
Severity: (no value)
Broken in: (no value)
Fixed in: (no value)

CC: Trevor Williams <twilliams [...]>, Manasa Mohan <mmanasa [...]>
Subject: bug report: bigrat computing logarithm appears to get stuck in loop
Date: Fri, 23 Oct 2015 17:09:27 +0000
To: "bug-bignum [...]" <bug-bignum [...]>
From: Eden Hochbaum <ehochbaum [...]>
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Bug Report: bigrat computing logarithm appears to get stuck in loop On perl 5.16.3 on the default amazon linux ec2 configuration (described below), with Math::BigRat version 0.2603, the following seems to give an endless loop: Show quoted text
> perl -e 'use bigrat; log(20)'
Interestingly, replacing 20 with (e.g.) 100 works just fine. Thanks, Eden -- Summary of my perl5 (revision 5 version 16 subversion 3) configuration: Platform: osname=linux, osvers=3.2.45-0.6.wd.514.39.260.metal1.x86_64, archname=x86_64-linux-thread-multi uname='linux 3.2.45-0.6.wd.514.39.260.metal1.x86_64 #1 smp thu feb 27 01:14:25 utc 2014 x86_64 x86_64 x86_64 gnulinux ' config_args='-des -Doptimize=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -Dccdlflags=-Wl,--enable-new-dtags -Dlddlflags=-shared -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DDEBUGGING=-g -Dversion=5.16.3 -Dmyhostname=localhost -Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dprefix=/usr -Dvendorprefix=/usr -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl5 -Dsitearch=/usr/local/lib64/perl5 -Dprivlib=/usr/share/perl5 -Dvendorlib=/usr/share/perl5/vendor_perl -Darchlib=/usr/lib64/perl5 -Dvendorarch=/usr/lib64/perl5/vendor_perl -Darchname=x86_64-linux-thread-multi -Dlibpth=/usr/local/lib64 /lib64 /usr/lib64 -Duseshrplib -Dusethreads -Duseithreads -Dusedtrace=/usr/bin/dtrace -Duselargefiles -Dd_semctl_semun -Di_db -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio -Dinstallusrbinperl=n -Ubincompat5005 -Uversiononly -Dpager=/usr/bin/less -isr -Dd_gethostent_r_proto -Ud_endhostent_r_proto -Ud_sethostent_r_proto -Ud_endprotoent_r_proto -Ud_setprotoent_r_proto -Ud_endservent_r_proto -Ud_setservent_r_proto -Dscriptdir=/usr/bin -Dusesitecustomize' hint=recommended, useposix=true, d_sigaction=define useithreads=define, usemultiplicity=define useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64', optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic', cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include' ccversion='', gccversion='4.8.2 20140120 (Red Hat 4.8.2-16)', 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='gcc', ldflags =' -fstack-protector' libpth=/usr/local/lib64 /lib64 /usr/lib64 libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc libc=, so=so, useshrplib=true, gnulibc_version='2.17' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE' cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic ' Characteristics of this binary (from libperl): Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API USE_SITECUSTOMIZE Locally applied patches: Fedora Patch1: Removes date check, Fedora/RHEL specific Fedora Patch3: support for libdir64 Fedora Patch4: use libresolv instead of libbind Fedora Patch5: USE_MM_LD_RUN_PATH Fedora Patch6: Skip hostname tests, due to builders not being network capable Fedora Patch7: Dont run one io test due to random builder failures Fedora Patch9: Fix find2perl to translate ? glob properly (RT#113054) Fedora Patch10: Fix broken atof (RT#109318) Fedora Patch13: Clear $@ before "do" I/O error (RT#113730) Fedora Patch14: Do not truncate syscall() return value to 32 bits (RT#113980) Fedora Patch15: Override the Pod::Simple::parse_file (CPANRT#77530) Fedora Patch16: Do not leak with attribute on my variable (RT#114764) Fedora Patch17: Allow operator after numeric keyword argument (RT#105924) Fedora Patch18: Extend stack in File::Glob::glob, (RT#114984) Fedora Patch19: Do not crash when vivifying $| Fedora Patch20: Fix misparsing of maketext strings (CVE-2012-6329) Fedora Patch21: Add NAME headings to CPAN modules (CPANRT#73396) Fedora Patch22: Fix leaking tied hashes (RT#107000) [1] Fedora Patch23: Fix leaking tied hashes (RT#107000) [2] Fedora Patch24: Fix leaking tied hashes (RT#107000) [3] Fedora Patch25: Fix dead lock in PerlIO after fork from thread (RT#106212) Fedora Patch26: Make regexp safe in a signal handler (RT#114878) Fedora Patch27: Update h2ph(1) documentation (RT#117647) Fedora Patch28: Update pod2html(1) documentation (RT#117623) Fedora Patch29: Document Math::BigInt::CalcEmu requires Math::BigInt (CPAN RT#85015) Built under linux Compiled at Sep 15 2014 18:16:40 @INC: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 . This is perl 5, version 16, subversion 3 (v5.16.3) built for x86_64-linux-thread-multi (with 25 registered patches, see perl -V for more detail) Copyright 1987-2012, Larry Wall Perl may be copied only under the terms of either the Artistic License or the GNU General Public License, which may be found in the Perl 5 source kit. Complete documentation for Perl, including FAQ lists, should be found on this system using "man perl" or "perldoc perl". If you have access to the Internet, point your browser at, the Perl Home Page.
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