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Report information
Id: 128893
Status: resolved
Priority: 0/
Queue: perl5

Owner: Nobody
Requestors: zefram [at] fysh.org
Cc:
AdminCc:

Operating System: Linux
PatchStatus: (no value)
Severity: low
Type: core
Perl Version: 5.24.0
Fixed In: (no value)



To: perlbug [...] perl.org
Subject: printf %a botches 0 flag for negative values
Date: Wed, 10 Aug 2016 21:37:29 +0100
CC: zefram [...] fysh.org
From: zefram [...] fysh.org
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This is a bug report for perl from zefram@fysh.org, generated with the help of perlbug 1.40 running under perl 5.24.0. ----------------------------------------------------------------- [Please describe your issue here] $ perl -lwe 'printf "%020a\n", $_ for 1.5, -1.5' 0x0000000000001.8p+0 -000000000000x1.8p+0 The latter has the zero padding in the wrong place. It should always go after the "0x", where it would be legal in a literal on input. The same fault happens not just for negative values, but in any situation where a sign character is being emitted: $ perl -lwe 'printf $_, 1.5 for "%+020a\n", "% 020a\n"' +000000000000x1.8p+0 000000000000x1.8p+0 [Please do not change anything below this line] ----------------------------------------------------------------- --- Flags: category=core severity=low --- Site configuration information for perl 5.24.0: Configured by zefram at Mon May 9 19:42:55 BST 2016. Summary of my perl5 (revision 5 version 24 subversion 0) configuration: Platform: osname=linux, osvers=3.16.0-4-amd64, archname=x86_64-linux-thread-multi uname='linux barba.rous.org 3.16.0-4-amd64 #1 smp debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 gnulinux ' config_args='-des -Dprefix=/home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52 -Duselargefiles -Dusethreads -Uafs -Ud_csh -Uusesfio -Uusenm -Duseshrplib -Dusedevel -Uversiononly -Ui_db' hint=recommended, useposix=true, d_sigaction=define useithreads=define, usemultiplicity=define use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2', optimize='-O2', cppflags='-D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='', gccversion='4.9.2', gccosandvers='' intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678, doublekind=3 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16, longdblkind=3 ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 alignbytes=8, prototype=define Linker and Libraries: ld='cc', ldflags =' -fstack-protector-strong -L/usr/local/lib' libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib libs=-lpthread -lnsl -ldb -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc libc=libc-2.19.so, so=so, useshrplib=true, libperl=libperl.so gnulibc_version='2.19' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/5.24.0/x86_64-linux-thread-multi/CORE' cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector-strong' --- @INC for perl 5.24.0: /home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/site_perl/5.24.0/x86_64-linux-thread-multi /home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/site_perl/5.24.0 /home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/5.24.0/x86_64-linux-thread-multi /home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/5.24.0 . --- Environment for perl 5.24.0: HOME=/home/zefram LANG (unset) LANGUAGE (unset) LD_LIBRARY_PATH (unset) LOGDIR (unset) PATH=/home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/bin:/home/zefram/usr/perl/util:/home/zefram/pub/x86_64-unknown-linux-gnu/bin:/home/zefram/pub/common/bin:/usr/bin:/bin:/usr/local/bin:/usr/games PERL_BADLANG (unset) SHELL=/usr/bin/zsh
RT-Send-CC: perl5-porters [...] perl.org
On Wed, 10 Aug 2016 13:37:53 -0700, zefram@fysh.org wrote: Show quoted text
> > This is a bug report for perl from zefram@fysh.org, > generated with the help of perlbug 1.40 running under perl 5.24.0. > > > ----------------------------------------------------------------- > [Please describe your issue here] > > $ perl -lwe 'printf "%020a\n", $_ for 1.5, -1.5' > 0x0000000000001.8p+0 > -000000000000x1.8p+0
I believe https://perl5.git.perl.org/perl.git/commit/be9304 fixed this. Show quoted text
> The latter has the zero padding in the wrong place. It should always > go > after the "0x", where it would be legal in a literal on input. The > same > fault happens not just for negative values, but in any situation where > a sign character is being emitted: > > $ perl -lwe 'printf $_, 1.5 for "%+020a\n", "% 020a\n"' > +000000000000x1.8p+0 > 000000000000x1.8p+0 > > [Please do not change anything below this line] > ----------------------------------------------------------------- > --- > Flags: > category=core > severity=low > --- > Site configuration information for perl 5.24.0: > > Configured by zefram at Mon May 9 19:42:55 BST 2016. > > Summary of my perl5 (revision 5 version 24 subversion 0) > configuration: > > Platform: > osname=linux, osvers=3.16.0-4-amd64, archname=x86_64-linux-thread- > multi > uname='linux barba.rous.org 3.16.0-4-amd64 #1 smp debian 3.16.7- > ckt11-1+deb8u6 (2015-11-09) x86_64 gnulinux ' > config_args='-des -Dprefix=/home/zefram/usr/perl/perl_install/perl- > 5.24.0-i64-f52 -Duselargefiles -Dusethreads -Uafs -Ud_csh -Uusesfio > -Uusenm -Duseshrplib -Dusedevel -Uversiononly -Ui_db' > hint=recommended, useposix=true, d_sigaction=define > useithreads=define, usemultiplicity=define > use64bitint=define, use64bitall=define, uselongdouble=undef > usemymalloc=n, bincompat5005=undef > Compiler: > cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict- > aliasing -pipe -fstack-protector-strong -I/usr/local/include > -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2', > optimize='-O2', > cppflags='-D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict-aliasing > -pipe -fstack-protector-strong -I/usr/local/include' > ccversion='', gccversion='4.9.2', gccosandvers='' > intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678, > doublekind=3 > d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16, > longdblkind=3 > ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', > lseeksize=8 > alignbytes=8, prototype=define > Linker and Libraries: > ld='cc', ldflags =' -fstack-protector-strong -L/usr/local/lib' > libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/4.9/include- > fixed /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu > /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib > libs=-lpthread -lnsl -ldb -ldl -lm -lcrypt -lutil -lc > perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc > libc=libc-2.19.so, so=so, useshrplib=true, libperl=libperl.so > gnulibc_version='2.19' > Dynamic Linking: > dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E > -Wl,-rpath,/home/zefram/usr/perl/perl_install/perl-5.24.0-i64- > f52/lib/5.24.0/x86_64-linux-thread-multi/CORE' > cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack- > protector-strong' > > > --- > @INC for perl 5.24.0: > /home/zefram/usr/perl/perl_install/perl-5.24.0-i64- > f52/lib/site_perl/5.24.0/x86_64-linux-thread-multi > /home/zefram/usr/perl/perl_install/perl-5.24.0-i64- > f52/lib/site_perl/5.24.0 > /home/zefram/usr/perl/perl_install/perl-5.24.0-i64- > f52/lib/5.24.0/x86_64-linux-thread-multi > /home/zefram/usr/perl/perl_install/perl-5.24.0-i64-f52/lib/5.24.0 > . > > --- > Environment for perl 5.24.0: > HOME=/home/zefram > LANG (unset) > LANGUAGE (unset) > LD_LIBRARY_PATH (unset) > LOGDIR (unset) > PATH=/home/zefram/usr/perl/perl_install/perl-5.24.0-i64- > f52/bin:/home/zefram/usr/perl/util:/home/zefram/pub/x86_64-unknown- > linux- > gnu/bin:/home/zefram/pub/common/bin:/usr/bin:/bin:/usr/local/bin:/usr/games > PERL_BADLANG (unset) > SHELL=/usr/bin/zsh


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