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Add partial summary for 2012-09-10

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+Perl 5 Porters Weekly: September 10-September 16, 2012
+Welcome to Perl 5 Porters Weekly, a summary of the email traffic on
+the perl5-porters email list. Once again subroutine signatures dominated
+the list. I'll put all of the discussion about them at the end of this
+This week's dusty thread is [CALL FOR DOCS: how to dual life?][1] from the
+week of August 6, 2012. Rik was looking for a volunteer to document the
+process of dual-lifing core code. He specifically called out Tie::Scalar and
+Time::local. Anyone have any insight into this? Contact [Ricardo
+This week's quote of the week is about an epic csh behavior relating to
+getcwd. As if you needed more reasons to [avoid csh][].
+ Csh does not rely on PWD. Instead, it does a getcwd all by itself.
+ It then prepends 'set cwd =' and evals the result. Thus interesting
+ things happen if the directory happens to have any csh metacharacters
+ in its name.
+Topics this week:
+* EXISTS and SCALAR return values are treated differently
+* 5.14.3 approaches
+* PATCH: pack()ing long words
+* rxres_save etc (was Re: Fix for recursive substitution)
+* given/when/~~ "final" thoughts (ha ha ha)
+* Changing the Perl error message when a module is not found
+* Named prototypes (again)
+**EXISTS and SCALAR return values are treated differently**
+I saved this thread because Yves Orton mentioned he had built some code to
+collect and show detailed hash utilizaton stats. The background for this
+thread had to do with the return values of EXISTS and SCALAR in tied hashes.
+[Read the thread][3]
+**5.14.3 approaches**
+Dominic Hargreaves announced that he's doing some work to get a 5.14.3
+maintenance release shipped, and so was looking for any overlooked patches
+which hadn't been part of the cherrymaint process. The first RC is due in
+[Read the announcement][4]
+**PATCH: pack()ing long words**
+[Last month][5], I noted that David Cantrell was proposing a new pack syntax that
+would take arbitrary length words. This week he submitted a set of patches
+to reserve the proposed syntax in blead.
+[Read the thread][6]
+**rxres_save etc (was Re: Fix for recursive substitution)**
+Nicholas Clark wrote an email saying that rxres_save() seems to do too much
+work in the perl core. The extra steps apparently date back to a 1997 patch
+intended for DBD::Oracle. Both Dave Mitchell and Yves Orton think a rethink
+and clean up is overdue for the way regex state is saved for potentially
+re-entrant/recursive calls.
+[Read the thread][7]
+**given/when/~~ "final" thoughts (ha ha ha)**
+Ricardo posted a summary of his view of smartmatch:
+ $x ~~ undef
+ $x ~~ $overloaded_object
+ $x ~~ sub {}
+ $x ~~ regex
+ ...or fail
+ ...with when:
+ when ("foo") # str eq
+ when (12345) # num ==
+ when ($x) # ~~
+ when { ... } # block evaluates true
+ when breaks the enclosing topicalizer
+And later, he wrote:
+ I feel like no matter what, given/when/~~ are really balancing on the
+ very very thin edge of "can be worth the complexity." I really do not
+ relish the idea of all the required work being done only to realize that
+ we've gone from unbearable to just barely bearable.
+Which got a couple of +1s and surprisingly few replies given how popular
+this thread was two weeks ago.
+[Read the thread][8]
+**Changing the Perl error message when a module is not found**
+Michael Stapelberg posted a suggestion to make the "module not found"
+error message friendlier to newbies. One proposed variation I liked was
+ Can't locate LWP/ in @INC (@INC contains: /etc/perl
+ /usr/local/lib/perl/5.12.4 /usr/local/share/perl/5.12.4 /usr/lib/perl5
+ /usr/share/perl5 /usr/lib/perl/5.12 /usr/share/perl/5.12
+ /usr/local/lib/site_perl .) at -e line 1.
+ BEGIN failed--compilation aborted at -e line 1.
+ The above error is most likely caused by Perl not finding the module
+ LWP::UserAgent. Try installing LWP::UserAgent from your distribution
+ or via CPAN. Run 'perldoc perlmodinst' for more information.
+The thread veered into a digression about having or adding "real" exception
+objects into the core (someday.)
+[Read the thread][9]
+**Named prototypes (again)**
+I O U a summary to be named later
+[avoid csh]:

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