mame	2018-01-07 21:55:10 +0900 (Sun, 07 Jan 2018)

  New Revision: 61655

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61655

  Log:
    node.c: fix SEGV of `->(a:){}` when --dump=parsetree

  Modified files:
    trunk/node.c
Index: node.c
===================================================================
--- node.c	(revision 61654)
+++ node.c	(revision 61655)
@@ -378,8 +378,13 @@ dump_node(VALUE buf, VALUE indent, int c https://github.com/ruby/ruby/blob/trunk/node.c#L378
 	ANN("format: [nd_vid](current dvar) = [nd_value]");
 	ANN("example: 1.times { x = foo }");
 	F_ID(nd_vid, "local variable");
-	LAST_NODE;
-	F_NODE(nd_value, "rvalue");
+	if (node->nd_value == NODE_SPECIAL_REQUIRED_KEYWORD) {
+	    F_MSG(nd_value, "rvalue", "NODE_SPECIAL_REQUIRED_KEYWORD (required keyword argument)");
+	}
+	else {
+	    LAST_NODE;
+	    F_NODE(nd_value, "rvalue");
+	}
 	return;
       case NODE_IASGN:
 	ANN("instance variable assignment");

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