-Autovivifying a subroutine stub via C<\&$glob> started causing crashes in
-Perl 5.18.0 if the $glob was merely a copy of a real glob, i.e., a scalar
-that had had a glob assigned to it. This has been fixed [perl #119051].
-
-=item *
-
-On 64-bit platforms C<pos> can now be set to a value higher than 2**31-1
-[perl #72766].
-
-=item *
-
-Perl used to leak an implementation detail when it came to referencing the
-return values of certain operators. C<for ($a+$b) { warn \$_; warn \$_ }>
-used to display two different memory addresses, because the C<\> operator
-was copying the variable. Under threaded builds, it would also happen for
-constants (C<for(1) { ... }>). This has been fixed [perl #21979, #78194,
-#89188, #109746, #114838, #115388].
-
-=item *
-
-The range operator C<..> was returning the same modifiable scalars with
-each call, unless it was the only thing in a C<foreach> loop header. This
-meant that changes to values within the list returned would be visible the
-next time the operator was executed [perl #3105].
-
-=item *
-
-Constant folding and subroutine inlining no longer cause operations that
-would normally return new modifiable scalars to return read-only values
-instead.
-
-=item *
-
-Closures of the form C<sub () { $some_variable }> are no longer inlined,
-causing changes to the variable to be ignored by callers of the subroutine
-[perl #79908].
-
-=item *
-
-Return values of certain operators such as C<ref> would sometimes be shared
-between recursive calls to the same subroutine, causing the inner call to
-modify the value returned by C<ref> in the outer call. This has been
-fixed.
-
-=item *
-
-C<__PACKAGE__> and constants returning a package name or hash key are now
-consistently read-only. In various previous Perl releases, they have
-become mutable under certain circumstances.