range.c: prohibit `(1..nil)`

Now endless range can be created by either a literal `(1..)` or explicit
range creation `Range.new(1, nil)`.  [Bug #14845]

This change is intended for "early failure"; for example,
`(1..var).to_a` causes out of memory if `var` is inadvertently nil.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63646 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 10 deletions

diff --git a/parse.y b/parse.y
index b1ddc1bf1c..53ad745ec9 100644
--- a/parse.y
+++ b/parse.y
@@ -1916,24 +1916,16 @@ arg		: lhs '=' arg_rhs
 		| arg tDOT2
 		    {
 		    /*%%%*/
-                        YYLTYPE loc;
-                        loc.beg_pos = @2.end_pos;
-                        loc.end_pos = @2.end_pos;
-
 			value_expr($1);
-			$$ = NEW_DOT2($1, new_nil(&loc), &@$);
+			$$ = NEW_DOT2($1, 0, &@$);
 		    /*% %*/
 		    /*% ripper: dot2!($1, Qnil) %*/
 		    }
 		| arg tDOT3
 		    {
 		    /*%%%*/
-                        YYLTYPE loc;
-                        loc.beg_pos = @2.end_pos;
-                        loc.end_pos = @2.end_pos;
-
 			value_expr($1);
-			$$ = NEW_DOT3($1, new_nil(&loc), &@$);
+			$$ = NEW_DOT3($1, 0, &@$);
 		    /*% %*/
 		    /*% ripper: dot3!($1, Qnil) %*/
 		    }