diff --git a/ChangeLog b/ChangeLog
index 6d4fd0cdbf..dc804c8a50 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+Wed Jul 12 20:05:23 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* parse.y (f_args): allow post mandatory arguments after optional
+	  arguments.  [ruby-dev:29014]
+
+	* parse.y (new_args_gen): allow post_args without rest_args.
+
+	* eval.c (formal_assign): ditto.
+
+	* parse.y (new_args_gen): check post argument duplication.
+
+Tue Jul 11 20:58:18 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* ruby.h: export rb_cMethod.  [ruby-talk:201259]
+
 Tue Jul 11 19:13:33 2006  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
 
 	* ext/tk/lib/multi-tk.rb: remove restriction on the class of 
@@ -43,6 +58,14 @@ Mon Jul 10 23:37:14 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 	  the first value from the result array if response has only one
 	  value.
 
+Mon Jul 10 22:00:00 2006  Shigeo Kobayashi  <shigek@ruby-lang.org>
+
+	* ext/bigdecimal/bigdecimal.c: Allows '_' to appear within
+	  digits.  [ruby-dev:28872]
+
+	* ext/bigdecimal/lib/bigdecimal/util.rb: Bug in to_r reported by
+	  [ruby-list:42533] fixed.
+
 Mon Jul 10 19:22:19 2006  Tanaka Akira  <akr@fsij.org>
 
 	* gc.c (gc_sweep): expand heap earlier.
diff --git a/eval.c b/eval.c
index ad976f4c2e..acd1840be9 100644
--- a/eval.c
+++ b/eval.c
@@ -244,7 +244,7 @@ static void rb_f_END(void);
 static struct BLOCK *passing_block(VALUE,struct BLOCK*);
 static int block_orphan(struct BLOCK *data);
 
-static VALUE rb_cMethod;
+VALUE rb_cMethod;
 static VALUE rb_cUnboundMethod;
 static VALUE umethod_bind(VALUE, VALUE);
 static VALUE rb_mod_define_method(int, VALUE*, VALUE);
@@ -5131,7 +5131,7 @@ assign(VALUE self, NODE *lhs, VALUE val, int pcall)
 	    int cnt;
 	    VALUE *p;
 
-	    if ((long)(lhs->nd_args) != -1) {
+	    if (lhs->nd_args && (long)(lhs->nd_args) != -1) {
 		assign(self, lhs->nd_args, val, 0);
 	    }
 	    cnt = lhs->nd_head->nd_alen;
@@ -5660,7 +5660,7 @@ formal_assign(VALUE recv, NODE *node, int argc, const VALUE *argv, VALUE *local_
 	NODE *opt = node->nd_opt;
 	int ac = argc - npost;
 
-	while (opt && ac) {
+	while (opt && ac > 0) {
 	    assign(recv, opt->nd_head, *argv, 1);
 	    argv++; ac--;
 	    ++i;
@@ -8372,7 +8372,7 @@ proc_s_new(int argc, VALUE *argv, VALUE klass)
 
 /*
  * call-seq:
- *   proc   { |...| block }  => a_proc
+ *   proc {|...| block }  => a_proc
  *
  * Equivalent to <code>Proc.new</code>.
  */
diff --git a/parse.y b/parse.y
index e26fc1eb66..c2d796eaf7 100644
--- a/parse.y
+++ b/parse.y
@@ -3941,6 +3941,14 @@ f_args		: f_arg ',' f_optarg ',' f_rest_arg opt_f_block_arg
 			$$ = dispatch5(params, $1, $3, Qnil, Qnil, escape_Qundef($4));
 		    %*/
 		    }
+		| f_arg ',' f_optarg ',' f_post_arg opt_f_block_arg
+		    {
+		    /*%%%*/
+			$$ = new_args($1, $3, 0, $5, $6);
+		    /*%
+			$$ = dispatch5(params, $1, $3, Qnil, $5, escape_Qundef($6));
+		    %*/
+		    }
 		| f_arg ',' f_rest_arg opt_f_block_arg
 		    {
 		    /*%%%*/
@@ -3989,6 +3997,14 @@ f_args		: f_arg ',' f_optarg ',' f_rest_arg opt_f_block_arg
 			$$ = dispatch5(params, Qnil, $1, Qnil, Qnil, escape_Qundef($2));
 		    %*/
 		    }
+		| f_optarg ',' f_post_arg opt_f_block_arg
+		    {
+		    /*%%%*/
+			$$ = new_args(0, $1, 0, $3, $4);
+		    /*%
+			$$ = dispatch5(params, Qnil, $1, Qnil, $3, escape_Qundef($4));
+		    %*/
+		    }
 		| f_rest_arg opt_f_block_arg
 		    {
 		    /*%%%*/
@@ -4089,7 +4105,7 @@ f_arg		: f_norm_arg
 			VALUE arg = ID2SYM($3);
 			$$ = $1;
 			if (rb_ary_includes($$, arg)) {
-			    yyerror("duplicated argument arg");
+			    yyerror("duplicated argument name");
 			}
 			rb_ary_push($$, arg);
 		    /*%
@@ -7898,9 +7914,18 @@ new_args_gen(struct parser_params *parser, VALUE m, NODE *o, NODE *r, NODE *p, N
 	    yyerror("duplicated rest argument name");
 	    return 0;
 	}
-	if (p) {
-	    r = NEW_POSTARG(r, p);
+    }
+    if (p) {
+	node = p;
+	while (node) {
+	    if (!node->nd_head) break;
+	    if (arg_dup_check(node->nd_head->nd_vid, m, list, node)) {
+		yyerror("duplicated argument name");
+		return 0;	
+	    }
+	    node = node->nd_next;
 	}
+	r = NEW_POSTARG(r, p);
     }
     node = NEW_ARGS(m, o, r);
     if (b) {
diff --git a/ruby.h b/ruby.h
index b0a0e3e7b9..28be3d3df2 100644
--- a/ruby.h
+++ b/ruby.h
@@ -654,6 +654,7 @@ RUBY_EXTERN VALUE rb_cFloat;
 RUBY_EXTERN VALUE rb_cHash;
 RUBY_EXTERN VALUE rb_cInteger;
 RUBY_EXTERN VALUE rb_cIO;
+RUBY_EXTERN VALUE rb_cMethod;
 RUBY_EXTERN VALUE rb_cModule;
 RUBY_EXTERN VALUE rb_cNilClass;
 RUBY_EXTERN VALUE rb_cNumeric;