compile.c: fix lhs splat in massign

* compile.c (compile_massign_lhs): when index ends with splat,
  append rhs value to it like POSTARG, since VM_CALL_ARGS_SPLAT
  splats the last argument only.  [ruby-core:72777] [Bug #11970]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53495 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_assignment.rb b/test/ruby/test_assignment.rb
index d0f2fadeaa..daf1f0a9be 100644
--- a/test/ruby/test_assignment.rb
+++ b/test/ruby/test_assignment.rb
@@ -758,4 +758,12 @@ class TestAssignmentGen < Test::Unit::TestCase
     o = bug9448.new
     assert_equal("ok", o['current'] = "ok")
   end
+
+  def test_massign_aref_lhs_splat
+    bug11970 = '[ruby-core:72777] [Bug #11970]'
+    h = {}
+    k = [:key]
+    h[*k], = ["ok", "ng"]
+    assert_equal("ok", h[:key], bug11970)
+  end
 end