=item *
+The *glob{FILEHANDLE} is deprecated, use *glob{IO} instead.
+
+=item *
+
Spurious syntax errors generated in certain situations, when glob()
caused File::Glob to be loaded for the first time, have been fixed. [561]
=head1 New or Changed Diagnostics
+Please see L<perldiag> for more details.
+
=over 4
=item *
+Ambiguous range in the transliteration operator (like a-z-9) now
+gives a warning.
+
+=item *
+
+Two new debugging options have been added: if you have compiled your
+Perl with debugging, you can use the -DT [561] and -DR options to trace
+tokenising and to add reference counts to displaying variables,
+respectively.
+
+=item *
+
The lexical warnings category "deprecated" is no longer a sub-category
of the "syntax" category. It is now a top-level category in its own
right.
=item *
+Unadorned dump() will now give a warning suggesting to
+use explicit CORE::dump() if that's what really is meant.
+
+=item *
+
+The "Unrecognized escape" warning has been extended to include C<\8>,
+C<\9>, and C<\_>. There is no need to escape any of the C<\w> characters.
+
+=item *
+
All regular expression compilation error messages are now hopefully
easier to understand both because the error message now comes before
the failed regex and because the point of failure is now clearly
=item *
-The various "opened only for", "on closed", "never opened" warnings
-drop the C<main::> prefix for filehandles in the C<main> package,
-for example C<STDIN> instead of C<main::STDIN>.
+Various I/O (and socket) functions like binmode(), close(), and so
+forth now more consistently warn if they are used illogically either
+on a yet unopened or on an already closed filehandle (or socket).
=item *
-The "Unrecognized escape" warning has been extended to include C<\8>,
-C<\9>, and C<\_>. There is no need to escape any of the C<\w> characters.
+Using lstat() on a filehandle now gives a warning. (It's a non-sensical
+thing to do.)
=item *
-Two new debugging options have been added: if you have compiled your
-Perl with debugging, you can use the -DT [561] and -DR options to trace
-tokenising and to add reference counts to displaying variables,
-respectively.
+The C<-M> and C<-m> options now warn if you didn't supply the module name.
+
+=item *
+
+If you in C<use> specify a required minimum version, modules matching
+the name and but not defining a $VERSION will cause a fatal failure.
+
+=item *
+
+Using negative offset for vec() in lvalue context is now a warnable offense.
+
+=item *
+
+Odd number of arguments to oveload::constant now elicits a warning.
+
+=item *
+
+Odd number of elements to in anonymous hash now elicits a warning.
+
+=item *
+
+The various "opened only for", "on closed", "never opened" warnings
+drop the C<main::> prefix for filehandles in the C<main> package,
+for example C<STDIN> instead of C<main::STDIN>.
+
+=item *
+
+Subroutine prototypes are now checked more carefully, you may
+get warnings for example if you have used non-prototype characters.
=item *
=item *
+pack C<P> format now demands an explicit size.
+
+=item *
+
+unpack C<w> now warns of unterminated compressed integers.
+
+=item *
+
+Warnings relating to the use of PerlIO have been added.
+
+=item *
+
Certain regex modifiers such as C<(?o)> make sense only if applied to
the entire regex. You will get an optional warning if you try to do
otherwise.
=item *
+Variable length lookbehind has not yet been implemented, trying to
+use it will tell that.
+
+=item *
+
Using arrays or hashes as references (e.g. C<< %foo->{bar} >>
has been deprecated for a while. Now you will get an optional warning.
=item *
+Warnings relating to the use of the new restricted hashes feature
+have been added.
+
+=item *
+
+Self-ties of arrays and hashes are not supported and fatal errors
+will happen even at an attempt to do so.
+
+=item *
+
Using C<sort> in scalar context now issues an optional warning.
This didn't do anything useful, as the sort was not performed.
+=item *
+
+Using the /g modifier in split() is meaningless and will cause a warning.
+
+=item *
+
+Using splice() past the end of an array now causes a warning.
+
+=item *
+
+Malformed Unicode encodings (UTF-8 and UTF-16) cause a lot of warnings,
+ad doestrying to use UTF-16 surrogates (which are unimplemented).
+
+=item *
+
+Trying to use Unicode characters on an I/O stream without marking the
+stream's encoding (using open() or binmode()) will cause "Wide character"
+warnings.
+
+=item *
+
+Use of v-strings in use/require causes a (backward) portability warning.
+
+=item *
+
+Warnings relating to the use interpreter threads and their shared data
+have been added.
+
=back
=head1 Changed Internals
=item *
+PerlIO is now the default.
+
+=item *
+
perlapi.pod (a companion to perlguts) now attempts to document the
internal API.
projects / p5sagit/p5-mst-13.2.git / commitdiff