This is a bug report for perl from zefram@fysh.org, generated with the help of perlbug 1.43 running under perl 5.37.9. ----------------------------------------------------------------- <!--[Please describe your issue here]--> perldiag\(1\) and perldeprecation\(1\) say that quotelike constructs no longer \(since Perl 5\.30\) permit the use of a delimiter that doesn\'t constitute a complete grapheme\. This prohibition doesn\'t entirely work\. Suppose I use a vertical bar as a delimiter\, with the character immediately following the opening delimiter being a combining circumflex\, such that the two characters combine into a single grapheme\: ``` $ perl -lwe $'use utf8; print length(q|\xcc\x82foo|)' 4 ``` Perl is aware that there isn\'t a grapheme cluster boundary there\: ``` $ perl -lwe $'use utf8; print "|\xcc\x82" =~ /.\\b{gcb}./ ? "yes" : "no"' no ``` <!--[Please do not change anything below this line]--> <!------------------------------------------------------------------- --> --- **Flags** - category=core - severity=low --- **Perl configuration** ``` Site configuration information for perl 5.37.9: Configured by zefram at Wed Mar 1 02:31:43 GMT 2023. Summary of my perl5 (revision 5 version 37 subversion 9) configuration: Platform: osname=linux osvers=5.10.0-21-amd64 archname=x86_64-linux-thread-multi uname='linux barba.rous.org 5.10.0-21-amd64 #1 smp debian 5.10.162-1 (2023-01-21) x86_64 gnulinux ' config_args='-des -Dprefix=/home/zefram/usr/perl/perl_install/perl-5.37.9-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 default_inc_excludes_dot=define 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='10.2.1 20210110' 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/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib libs=-lpthread -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc libc=libc-2.31.so so=so useshrplib=true libperl=libperl.so gnulibc_version='2.31' Dynamic Linking: dlsrc=dl_dlopen.xs dlext=so d_dlsymun=undef ccdlflags='-Wl,-E -Wl,-rpath,/home/zefram/usr/perl/perl_install/perl-5.37.9-i64-f52/lib/5.37.9/x86_64-linux-thread-multi/CORE' cccdlflags='-fPIC' lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector-strong' --- @INC for perl 5.37.9: /home/zefram/usr/perl/perl_install/perl-5.37.9-i64-f52/lib/site_perl/5.37.9/x86_64-linux-thread-multi /home/zefram/usr/perl/perl_install/perl-5.37.9-i64-f52/lib/site_perl/5.37.9 /home/zefram/usr/perl/perl_install/perl-5.37.9-i64-f52/lib/5.37.9/x86_64-linux-thread-multi /home/zefram/usr/perl/perl_install/perl-5.37.9-i64-f52/lib/5.37.9 --- Environment for perl 5.37.9: HOME=/home/zefram LANG (unset) LANGUAGE (unset) LD_LIBRARY_PATH (unset) LOGDIR (unset) PATH=/home/zefram/usr/perl/perl_install/perl-5.37.9-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 ```