Document .closing standard handles

will lead to inability to open them again

Author: zoffixznet

doc/Type/IO/Handle.pod6

@@ -686,7 +686,10 @@ Defined as:
     multi sub close(IO::Handle $fh)
 
 Closes an open file handle. It's not an error to call C<close> on an
-already-closed filehandle. Returns C<True> on success.
+already-closed filehandle. Returns C<True> on success. If you close
+one of the standard file handles (by default: C<$*IN>, C<$*OUT>, or C<$*ERR>),
+that is any handle with L<native-descriptor> C<2> or lower, you won't be
+able to re-open such a handle.
 
 It's a common idiom to use L«C<LEAVE> phaser|/language/phasers#LEAVE» for
 closing the handles, which ensures the handle is closed regardless of how the