Hey everyone,

Following is the p5p (Perl 5 Porters) mailing list summary for the past week.

Enjoy!

June 6th-11th

News

Following the fixes to Scope::Upper, Dave Mitchell reapplied his change to eval behavior.

Dave Mitchell has reworked the Perl_sv_vcatpvfn_flags() function, resulting in 104 commits, 8 bug fixes, 4 buffer sizing and length calculation overflow/wraps, 4 optimizations (leading to a 15% speed improvement), and more changes.

Dave Mitchell also suggests changing a sprintf "%c" with a negative argument to behave the way chr() does, returning a UNICODE_REPLACEMENT character and a warning.

We are now tracking tickets blocking 5.26.1 in Perl #131533.

Encode is upgraded to version 2.90.

Grant Reports

• Dave Mitchell TPF Grant 2 report 178.

Issues

New Issues

• Perl #131519: cv_clone() SEGV without helpful message if called on already-cloned sub.
• Perl #131520: POSIXLY_CORRECT=1 stops perl 5.26.0 from building due to pod/buildtoc -q not supported.
• Perl #131522: Spurious "Assuming NOT a POSIX class" warning.
• Perl #131526: heap-buffer-overflow (READ of size 1) in Perl_my_atof2().
• Perl #131531: testsuite lib/Benchmark unresponsive on older SPARC Solaris 10 server.
• Perl #131532: swap needs to be removed from perlreapi.
• Perl #131538: Special-case use v6.
• Perl #131544: scalar filehandle and truncate/seek.
• Perl #131546: Can open() to an in-memory scalar return false?.
• Perl #131551: segfault in S_regnode_guts.

Resolved Issues

• Perl #78288: ref and other ops are inefficient in boolean context.
• Perl #120521: Feature request: builtin array holding ($1,$2,$3,...).
• Perl #123738: eval {} still clobbers $@ in a DESTROY.
• Perl #123773: DESTROY clobbers $@ in a eval {}.
• Perl #129300: Assertion Failure: Perl_sv_grow.
• Perl #131166: Error in documentation on "perldata".
• Perl #131221: Cannot clone handle with via layer.
• Perl #131263: Perl mess with UTF8 flag of GV.
• Perl #131314: "unused parameter" warning when building with g++.
• Perl #131337: 24e16d7 broke g++ build on FreeBSD-11.0.

Patches

Tony Cook provided a patch to fix Perl #131263 (Perl mess with UTF8 flag of GV), which was merged.

Jacques Germishuys provided a patch for the correct usage of PREMSVC80 which was merged.

Ron Schmidt provided a patch in Perl #131518 to document better the difference between -M and -m.

Discussion

Abigail asks about the behavior of undef'ing the soon-deprecated ${^ENCODING} variable.

Karl Williamson asks whether qr/(?[...])/ can be made non-experimental in 5.28.