parse.y: chained assignments

* parse.y (command_asgn, arg): fix syntax errors with chained
  assignment with op assign.  [Bug #12669]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/test/ruby/test_assignment.rb b/test/ruby/test_assignment.rb
index 41c14d3a44..45c4d6e058 100644
--- a/test/ruby/test_assignment.rb
+++ b/test/ruby/test_assignment.rb
@@ -771,4 +771,14 @@ class TestAssignmentGen < Test::Unit::TestCase
     h[*k], = ["ok", "ng"]
     assert_equal("ok", h[:key], bug11970)
   end
+
+  def test_chainged_assign_command
+    all_assertions do |a|
+      asgn = %w'= +='
+      asgn.product(asgn) do |a1, a2|
+        stmt = "a #{a1} b #{a2} raise 'x'"
+        a.for(stmt) {assert_valid_syntax(stmt)}
+      end
+    end
+  end
 end