Summary week of June 3 2013

2013/06/03.md

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+Perl 5 Porters Weekly: June 3-9, 2013
+=====================================
+
+Welcome to Perl 5 Porters Weekly, a summary of the email traffic of the
+perl5-porters email list.
+
+Topics this week include:
+
+* DAVEM TPF Grant May 2013 report
+* dtrace sub-entry probe against lexical sub segfaults
+* COW and THINKFIRST and related safety
+
+**DAVEM TPF Grant May 2013 report**
+
+Dave Mitchell posted his monthly summary of the work he's done on the 
+Perl core.
+
+> This month was mostly spent on removing global state from the regex
+> engine, making re-entrantcy less error-prone. The extract from the merge
+> commit description below gives you all the details you could ever want.
+>
+> Apart from that I spent a few hours re-enabling Copy-on-Write by default
+> post the 5.18.0 release, plus a few other bits and pieces.
+>
+> It turns out that I have finally used up all the hours on my grant plus
+> extensions. I really must get round to applying for a new grant sometime
+> soon!
+
+[Read the report][1]
+
+**dtrace sub-entry probe against lexical sub segfaults**
+
+During my [talk about DTrace][2] at YAPC::NA this past week, Ricardo Signes
+found and filed a bug against the lexical subroutine changes in blead with
+respect to the Perl sub-entry DTrace probe.
+
+There's a patch for the segfault, but the unit test appears broken.
+
+[Read the thread][3]
+
+**COW and THINKFIRST and related safety**
+
+RJBS wanted to point out some messages from Dave Mitchell about the safe way
+to deal with strings in the C/XS layer of Perl which became tricksier with
+the introduction of Copy-on-Write.
+
+[Message 1][4]
+
+[Message 2][5]
+
+[Read the original][6]
+
+[1]: http://www.nntp.perl.org/group/perl.perl5.porters/2013/06/msg202639.html
+[2]: https://speakerdeck.com/mrallen1/perl-dtrace-and-you
+[3]: http://www.nntp.perl.org/group/perl.perl5.porters/2013/06/msg202693.html
+[4]: http://www.nntp.perl.org/group/perl.perl5.porters/2013/05/msg201914.html
+[5]: http://www.nntp.perl.org/group/perl.perl5.porters/2013/05/msg202043.html
+[6]: http://www.nntp.perl.org/group/perl.perl5.porters/2013/06/msg202815.html