use utf8 breaks ?{}

[p5pRT]

Migrated from rt.perl.org#7050 (status was 'resolved')

Searchable as RT7050$

[p5pRT]

From @jhi

use utf8;
$out = 1;
'abc' =~ m'a(?{ $out = 3 })c';
print "not " if $out != 1;
print "ok ($out)\n";

Under bleadperl this outputs "not ok (3)\n".

By commenting out the use utf8 the expected "ok (1)\n" gets output.

(This is op/pat #64, the problem again found -Mutf8.)

Perl Info

Flags:
    category=core
    severity=medium

Site configuration information for perl v5.7.1:

Configured by jhi at Mon May 28 19:49:20 EET DST 2001.

Summary of my perl5 (revision 5.0 version 7 subversion 17) configuration:
  Platform:
    osname=dec_osf, osvers=4.0f, archname=alpha-dec_osf
    uname='osf1 kosh.hut.fi v4.0 1229 alpha '
    config_args='-des -Dusedevel -Doptimize=-g'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=define use64bitall=define uselongdouble=undef
  Compiler:
    cc='cc', ccflags ='-std -DDEBUGGING -DLANGUAGE_C',
    optimize='-g',
    cppflags='-std -DDEBUGGING -DLANGUAGE_C'
    ccversion='V5.9-011', gccversion='', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='ld', ldflags =''
    libpth=/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /var/shlib
    libs=-lgdbm -ldbm -ldb -lm -liconv -lutil
    perllibs=-lm -liconv -lutil
    libc=/usr/shlib/libc.so, so=so, useshrplib=true, libperl=libperl.so
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='  -Wl,-rpath,/usr/local/lib/perl5/5.7.1/alpha-dec_osf/CORE'
    cccdlflags=' ', lddlflags='-shared -expect_unresolved "*" -g -msym -std'

Locally applied patches:
    DEVEL10209


@INC for perl v5.7.1:
    lib
    /u/vieraat/vieraat/jhi/Perl/lib
    /usr/local/lib/perl5/5.7.1/alpha-dec_osf
    /usr/local/lib/perl5/5.7.1
    /usr/local/lib/perl5/site_perl/5.7.1/alpha-dec_osf
    /usr/local/lib/perl5/site_perl/5.7.1
    /usr/local/lib/perl5/site_perl
    .


Environment for perl v5.7.1:
    HOME=/u/vieraat/vieraat/jhi
    LANG=C
    LANGUAGE (unset)
    LC_ALL=fi_FI.ISO8859-1
    LC_CTYPE=fi_FI.ISO8859-1
    LD_LIBRARY_PATH=/tmp/jhi/perl
    LOGDIR (unset)
    PATH=/p/test/bin:/u/vieraat/vieraat/jhi/.s:/u/vieraat/vieraat/jhi/.b/OSF1:/c/bin:/p/bin:/p/adm/bin:/usr/bin:/usr/sbin:/sbin:/bin:/usr/ccs/bin:/usr/lib:/etc:/lib:/p/X6/bin:/p/X5/bin:/usr/bin/X11:/usr/lbin:/usr/sbin/acct:/usr/tcb/bin:/tcb/bin:/usr/field:/u/vieraat/vieraat/jhi
    PERLLIB=/u/vieraat/vieraat/jhi/Perl/lib
    PERL_BADLANG (unset)
    SHELL=/bin/zsh

[p5pRT]

From @jhi

Inaba Hiroto pointed out to me a simple explanation for the
behavioral difference​:

: The reason why the former regexp does not change $out is​:
:
: Without `use utf8', regexp engine uses the anchored substr 'ac' of the
: regexp and "abc" is rejected before processing regnodes, so it does not
: change $out.

(He also agreed that the op/pat test itself doesn't look right.)

[p5pRT]

From @jhi

This seems to have been fixed by Perl 5.8.0 final.

[p5pRT]

@jhi - Status changed from 'open' to 'resolved'