* compile.c (compile_massign_opt): fix to skip massign optimization

  with global variables.
* bootstraptest/test_massign.rb: add some tests for above.



git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@13246 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/bootstraptest/test_massign.rb b/bootstraptest/test_massign.rb
index 202dbd38e..c95c17872 100644
--- a/bootstraptest/test_massign.rb
+++ b/bootstraptest/test_massign.rb
@@ -4,6 +4,14 @@ assert_equal '[[1], 2, 3]', '*v1,(*), (a, b) = [1,:x,[2, 3]]; [v1, a, b]'
 assert_equal '[]',          '*a = *nil; a'
 assert_equal '[nil]',       '*a = nil; a'
 assert_equal '2',           'a, a = 1, 2; a', "[ruby-dev:31522]"
+assert_equal '[1, 2]',      'a, b = 1, 2'
+assert_equal '[1, 2]', %q{
+  ans = []
+  trace_var(:$a){|v| ans << v}
+  trace_var(:$b){|v| ans << v}
+  $a, $b = 1, 2
+  ans
+}
 
 =begin
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