X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperldiag.pod;h=37710b9a45c774a615a7355b31f4b8da59bbf2a1;hb=b31b80f9d91ded188b47dd78c18a0a1effe2584d;hp=10b77c9c532af76b9633b0a3e02b5ba528852d43;hpb=9a2ff54bd438cc69afafd5eb1abfa632ccd44708;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 10b77c9..37710b9 100644
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -689,11 +689,11 @@ editor will have a way to help you find these characters.
 
 =item Can't find %s property definition %s
 
-(F) You may have tried to use C<\p> which means a Unicode property for
-example \p{Lu} is all uppercase letters.  if you did mean to use a
+(F) You may have tried to use C<\p> which means a Unicode property (for
+example C<\p{Lu}> is all uppercase letters).  If you did mean to use a
 Unicode property, see L<perlunicode> for the list of known properties.
 If you didn't mean to use a Unicode property, escape the C<\p>, either
-C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until
+by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until
 possible C<\E>).
 
 =item Can't fork
@@ -1498,13 +1498,25 @@ PDP-11 or something?
 to be a read-write filehandle, you needed to open it with "+<" or "+>"
 or "+>>" instead of with "<" or nothing.  If you intended only to write
 the file, use ">" or ">>".  See L<perlfunc/open>.
+The warning will also occur if STDOUT (file descriptor 1) or STDERR
+(file descriptor 2) is opened for input, this is a pre-emptive warning in
+case some other part of your program or a child process is expecting STDOUT
+and STDERR to be writable. This can happen accidentally if you
+C<close(STDOUT)> or STDERR and then C<open> an unrelated handle which
+will resuse the lowest numbered available descriptor.
 
 =item Filehandle %s opened only for output
 
-(W io) You tried to read from a filehandle opened only for writing.  If
-you intended it to be a read/write filehandle, you needed to open it
+(W io) You tried to read from a filehandle opened only for writing.
+If you intended it to be a read/write filehandle, you needed to open it
 with "+<" or "+>" or "+>>" instead of with "<" or nothing.  If you
 intended only to read from the file, use "<".  See L<perlfunc/open>.
+The warning will also occur if STDIN (file descriptor 0) is opened
+for output - this is a pre-emptive warning in case some other part of your
+program or a child process is expecting STDIN to be readable.
+This can happen accidentally if you C<close(STDIN)> and then C<open> an
+unrelated handle which will resuse the lowest numbered available
+descriptor.
 
 =item Final $ should be \$ or $name
 
@@ -3017,7 +3029,7 @@ declared or defined with a different function prototype.
 
 =item Prototype not terminated
 
-(F) You've omitted the closing parenthesis in a function prototype 
+(F) You've omitted the closing parenthesis in a function prototype
 definition.
 
 =item Quantifier in {,} bigger than %d in regex;
@@ -4134,7 +4146,7 @@ defined B<awk> feature.  Use an explicit printf() or sprintf() instead.
 
 =item Use of reference "%s" as array index
 
-(W) You tried to use a reference as an array index; this probably
+(W misc) You tried to use a reference as an array index; this probably
 isn't what you mean, because references in numerical context tend
 to be huge numbers, and so usually indicates programmer error.
 
@@ -4154,7 +4166,7 @@ a package qualifier, e.g. C<&our()>, or C<Foo::our()>.
 
 =item Use of tainted arguments in %s is deprecated
 
-(W taint) You have supplied C<system()> or C<exec()> with multiple 
+(W taint) You have supplied C<system()> or C<exec()> with multiple
 arguments and at least one of them is tainted.  This used to be allowed
 but will become a fatal error in a future version of perl.  Untaint your
 arguments.  See L<perlsec>.
@@ -4293,7 +4305,7 @@ the version number.
 
 =item v-string in use/require is non-portable
 
-(W) The use of v-strings is non-portable to older, pre-5.6, Perls.
+(W portable) The use of v-strings is non-portable to older, pre-5.6, Perls.
 If you want your scripts to be backward portable, use the floating
 point version number: for example, instead of C<use 5.6.1> say
 C<use 5.006_001>.  This of course won't help: the older Perls