* eval.c (rb_eval): care that another thread replace NODE_DREGX_ONCE

  to NODE_LIT.  [ruby-dev:22920]


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@5740 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index 9d46524f0..e4890de26 100644
--- a/eval.c
+++ b/eval.c
@@ -3643,6 +3643,9 @@ rb_eval(self, n)
 		nd_set_type(node, NODE_LIT);
 		node->nd_lit = result;
 		break;
+              case NODE_LIT:
+                /* other thread may replace NODE_DREGX_ONCE to NODE_LIT */
+		goto again;
 	      case NODE_DXSTR:
 		result = rb_funcall(self, '`', 1, str);
 		break;