variable.c: $1..$9 in global_variables

* variable.c (rb_f_global_variables): add $1..$9 only if $~ is
  set.  fix the condition removed at r14014.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/test/ruby/test_variable.rb b/test/ruby/test_variable.rb
index 667f9ee24f..90afde19cb 100644
--- a/test/ruby/test_variable.rb
+++ b/test/ruby/test_variable.rb
@@ -100,6 +100,16 @@ class TestVariable < Test::Unit::TestCase
     assert_equal([:x, :bug9486], x)
   end
 
+  def test_global_variables
+    gv = global_variables
+    assert_empty(gv.grep(/\A(?!\$)/))
+    assert_nil($~)
+    assert_not_include(gv, :$1)
+    /.*/ =~ "global"
+    assert_not_nil($~)
+    assert_include(global_variables-gv, :$1)
+  end
+
   def test_global_variable_0
     assert_in_out_err(["-e", "$0='t'*1000;print $0"], "", /\At+\z/, [])
   end