nobu	2018-03-06 18:03:24 +0900 (Tue, 06 Mar 2018)

  New Revision: 62675

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62675

  Log:
    parse.y: tSPACE for old bison
    
    * parse.y (tSPACE): define a separate token for escaped space, to
      fix `redefining user token number of ' '` error at word list
      separator on bison 2.

  Modified files:
    trunk/parse.y
Index: parse.y
===================================================================
--- parse.y	(revision 62674)
+++ parse.y	(revision 62675)
@@ -838,7 +838,7 @@ static void token_info_pop(struct parser https://github.com/ruby/ruby/blob/trunk/parse.y#L838
 %token <id> '.'
 /* escaped chars, should be ignored otherwise */
 %token <id> '\\'	"backslash"
-%token <id> ' ' 	"escaped space"
+%token tSPACE		"escaped space"
 %token <id> '\t' 	"escaped horizontal tab"
 %token <id> '\f'	"escaped form feed"
 %token <id> '\r'	"escaped carriage return"
@@ -8101,6 +8101,7 @@ parser_yylex(struct parser_params *p) https://github.com/ruby/ruby/blob/trunk/parse.y#L8101
 	    dispatch_scan_event(p, tSP);
 	    goto retry; /* skip \\n */
 	}
+	if (c == ' ') return tSPACE;
 	if (ISSPACE(c)) return c;
 	pushback(p, c);
 	return '\\';

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