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This was a week of many little threads consisting of bug reports and fixes, with 360 messages.
Artur Bergman, while working on the new iThreads threading model, has
reported that variable attributes are not usable for
Variable attributes are an experimental feature of Perl that are a
means of associating "out of band" information with a variable. The
problem is that, as
Nick Ing-Simmons pointed out, in the current
implementation, the attribute code is called at compile time (this is
also where the
tie happens), but that the scope cleanup removes the
"magic" from the variable.
Some discussion ensued on the fact that the code was working as designed, but that the design needed to be expanded slightly, by removing the restriction that the attribute callbacks were designed to be called at compile time. Gurusamy Sarathy provided a possible solution by adding another hook, and I documented the brokeness.
Michael Stevens and Larry Virden submitted bug reports via the perlbug
interface for a bug which was only present in
perl-current. Perl-current (also known as bleadperl) is the absolute
latest development version of Perl, and (as
perlhack mentions, "is usually in a perpetual state of evolution. You should
expect it to be very buggy".
Jarkko mentioned that he didn't think
submitting perlbugs on bleadperl was a good idea:
Also, I don't think submitting perlbugs on rsynced snapshots is a good plan. If one is playing with the snapshots, one is playing with the bleeding edge, and one should directly send a report to p5p, not as a full perlbug report.Philip Newton reminded us that the point of development releases is to find and fix bugs. Merijn Brand provided a patch to include the patch snapshot level into perlbug reports. Jarkko releases snapshots of bleadperl a couple of times a week, the latest being called 10210, and including the level will help find the bug being reported.
The rationale: the perlbug database is already working "too well" :-) by being too full of bugs that strictly speaking aren't. I don't want the database to clutter up with noise from volatile snapshots. I cannot and will not guarantee that every check-in I make is free from test failures. For the announced snapshots I try harder.
Ilya Zakharevich provided a patch to clean up output of the test harness, fixing the alignment of the fields making it easier to read reports with failures. Michael Schwern disagreed on the patches necessary, leading to a small tug of war. As Jarkko pointed out "the suggested patches are not converging".
Uros Juvan reported a bug about
Time::Local and invalid dates: it would return different dates in that case. For
example, asking for February 30th would return March 2nd without
giving a warning. It contains tests which are a little too primitive,
and a patch was supplied by Stephen Potter.
John Peacock submitted a patch to make sure magic is removed at scope
Mike Guy supplied a patch to support qualified variables in "use
vars", somewhat controversially (a similar patch for
our by Mark-Jason Dominus last year was rejected). He also supplied a
patch to remove the long deprecated uppercase aliases for the string
comparison operators EQ, NE, LT, LE, GE, GT etc. This led to the most
amusing idea of the week: Jarkko suggested testing the Perl parser
with some some Markov chain (n-characters) generated Perl-like
gibberish: "That way we get a lot of data that constantly begins to
look like valid Perl but then switches back to not being Perl". No-one
provided such a Markov chain, unfortunately.
Michael Schwern submitted some more minor patches, including trying to
get Perl to compile cleanly under
Hugo proposed removing
PL_multiline), which has been deprecated
since at least as far back as 5.003_97.
Gisle Aas patched Perl to allow overriding of
require to be delayed slightly to increase its usefulness.
Colin P McMillen asked if Perl's
sort function was intended to be stable, which resulted in a documentation
patch by John P. Linderman stating "Perl does not guarantee that
sort is stable".
Richard Soderberg patched a bug found by Mark-Jason Dominus where a localized glob loses its value when it is assigned to.
There were various other minor patches, but I think most people have been relaxing in the sun this week. Until next week I remain, your temporarily-replaced humble and obedient servant,