[perl #120799] 5.18 regression with [:^ascii] and \x80-\xFF

# New Ticket Created by  karl williamson 
# Please include the string:  [perl #120799]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=120799 >


This is a bug report for perl from khw@cpan.org,
generated with the help of perlbug 1.39 running under perl 5.19.7.


-----------------------------------------------------------------
"\x80" =~ /[_[:^ascii:]]/d;

no longer matches as of 5.18; whereas it previously did.  This bug
happens for all target string characters in the range \x80 through \xFF.
The bug doesn't happen if the bracketed character class contains only a
single element, the [:^ascii:].  This example uses an underscore for
the purpose of getting at least 2 elements in the class.

The bug is only for [:^ascii:].  The other posix classes work correctly.
-----------------------------------------------------------------
---
Flags:
     category=core
     severity=medium
---
Site configuration information for perl 5.19.7:

Configured by khw at Sat Dec 14 17:12:55 MST 2013.

Summary of my perl5 (revision 5 version 19 subversion 7) configuration:
   Commit id: 4cb2d3f84a9b1e2c2b94017be5dcd72f24935669
   Platform:
     osname=linux, osvers=2.6.35-32-generic-pae, 
archname=i686-linux-thread-multi-64int-ld
     uname='linux karl 2.6.35-32-generic-pae #67-ubuntu smp mon mar 5 
21:23:19 utc 2012 i686 gnulinux '
     config_args='-des -Dprefix=/home/khw/fastbleadperl -Dusedevel 
-Accflags='-DPERL_BOOL_AS_CHAR' -Dman1dir=none -Dman3dir=none 
-Dusemorebits -Dusethreads'
     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=define
     usemymalloc=n, bincompat5005=undef
   Compiler:
     cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DPERL_BOOL_AS_CHAR 
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include 
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
     optimize='-O2',
     cppflags='-D_REENTRANT -D_GNU_SOURCE -DPERL_BOOL_AS_CHAR 
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
     ccversion='', gccversion='4.4.5', 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='long double', nvsize=12, 
Off_t='off_t', lseeksize=8
     alignbytes=4, prototype=define
   Linker and Libraries:
     ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
     libpth=/usr/local/lib /lib/../lib /usr/lib/../lib /lib /usr/lib 
/usr/lib/i686-linux-gnu
     libs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
     perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
     libc=/lib/libc-2.12.1.so, so=so, useshrplib=false, libperl=libperl.a
     gnulibc_version='2.12.1'
   Dynamic Linking:
     dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
     cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib 
-fstack-protector'


---
@INC for perl 5.19.7:
     /home/khw/perl/fastblead/lib
 
/home/khw/fastbleadperl/lib/site_perl/5.19.7/i686-linux-thread-multi-64int-ld
     /home/khw/fastbleadperl/lib/site_perl/5.19.7
     /home/khw/fastbleadperl/lib/5.19.7/i686-linux-thread-multi-64int-ld
     /home/khw/fastbleadperl/lib/5.19.7
     /home/khw/fastbleadperl/lib/site_perl
     .

---
Environment for perl 5.19.7:
     HOME=/home/khw
     LANG=en_US.UTF-8
     LANGUAGE=en_US:en
     LD_LIBRARY_PATH (unset)
     LOGDIR (unset)
 
PATH=/home/khw/bin:/home/khw/perl5/perlbrew/bin:/home/khw/print/bin:/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/usr/games:/home/khw/cxoffice/bin
     PERL5OPT=-w
     PERL_BADLANG (unset)
     PERL_POD_PEDANTIC=1
     SHELL=/bin/ksh

• [perl #120799] 5.18 regression with [:^ascii] and \x80-\xFF by Ricardo SIGNES via RT
• [perl #120799] 5.18 regression with [:^ascii] and \x80-\xFF by Karl Williamson via RT
• [perl #120799] 5.18 regression with [:^ascii] and \x80-\xFF by karl williamson