Don't autovivify stashes as soon as the lexer sees them.

This makes defined %foo::bar:: work again.
Add tests for it, remove note in perldelta about having broken it.

p4raw-id: //depot/perl@26370

1 files changed, 13 insertions, 1 deletions

diff --git a/t/op/stash.t b/t/op/stash.t
index 0cd7ebf5e7..744177511d 100644
--- a/t/op/stash.t
+++ b/t/op/stash.t
@@ -7,7 +7,7 @@ BEGIN {
 
 require "./test.pl";
 
-plan( tests => 2 );
+plan( tests => 8 );
 
 # Used to segfault (bug #15479)
 fresh_perl_is(
@@ -24,3 +24,15 @@ fresh_perl_is(
     { switches => [ '-w' ] },
     q(Insert a non-GV in a stash, under warnings 'once'),
 );
+
+ok( !defined %oedipa::maas::, q(stashes aren't defined if not used) );
+ok( !defined %{"oedipa::maas::"}, q(- work with hard refs too) );
+
+ok( defined %tyrone::slothrop::, q(stashes are defined if seen at compile time) );
+ok( defined %{"tyrone::slothrop::"}, q(- work with hard refs too) );
+
+ok( defined %bongo::shaftsbury::, q(stashes are defined if a var is seen at compile time) );
+ok( defined %{"bongo::shaftsbury::"}, q(- work with hard refs too) );
+
+package tyrone::slothrop;
+$bongo::shaftsbury::scalar = 1;