documentation tweaks from M. J. T. Guy, Micheal Schwern, and

Tim Meadowcroft

p4raw-id: //depot/perl@4666

2 files changed, 8 insertions, 2 deletions

diff --git a/pod/perlipc.pod b/pod/perlipc.pod
index e687304510..3034197e14 100644
--- a/pod/perlipc.pod
+++ b/pod/perlipc.pod
@@ -152,6 +152,10 @@ Here's an example:
     };
     if ($@ and $@ !~ /alarm clock restart/) { die }
 
+If the operation being timed out is system() or qx(), this technique
+is liable to generate zombies.    If this matters to you, you'll
+need to do your own fork() and exec(), and kill the errant child process.
+
 For more complex signal handling, you might see the standard POSIX
 module.  Lamentably, this is almost entirely undocumented, but
 the F<t/lib/posix.t> file from the Perl source distribution has some
diff --git a/pod/perlre.pod b/pod/perlre.pod
index 1610254da5..9c88a0bd4c 100644
--- a/pod/perlre.pod
+++ b/pod/perlre.pod
@@ -936,8 +936,10 @@ in C<[]>, which will match any one character from the list.  If the
 first character after the "[" is "^", the class matches any character not
 in the list.  Within a list, the "-" character specifies a
 range, so that C<a-z> represents all characters between "a" and "z",
-inclusive.  If you want "-" itself to be a member of a class, put it
-at the start or end of the list, or escape it with a backslash.  (The
+inclusive.  If you want either "-" or "]" itself to be a member of a
+class, put it at the start of the list (possibly after a "^"), or
+escape it with a backslash.  "-" is also taken literally when it is
+at the end of the list, just before the closing "]".  (The
 following all specify the same class of three characters: C<[-az]>,
 C<[az-]>, and C<[a\-z]>.  All are different from C<[a-z]>, which
 specifies a class containing twenty-six characters.)