diff --git a/ChangeLog b/ChangeLog
index 63fb65a8e7..6eb1392085 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+Mon Nov 19 17:58:49 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (rb_mod_modfunc): should follow NODE_ZSUPER link; based
+	  on Guy Decoux's patch in [ruby-talk:25478].
+
+Mon Nov 19 16:09:33 2001  Tanaka Akira  <akr@m17n.org>
+
+	* string.c (rb_str_succ): there was buffer overrun.
+
+Mon Nov 19 14:14:58 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* parse.y (str_extend): term can be any character.
+
 Mon Nov 19 04:58:42 2001  Wakou Aoyama  <wakou@fsinet.or.jp>
 
 	* lib/cgi.rb (header): support for Apache. thanks to
diff --git a/array.c b/array.c
index 9fae8dcc46..9d5dcd768f 100644
--- a/array.c
+++ b/array.c
@@ -860,8 +860,10 @@ rb_ary_to_s(ary)
     VALUE str, sep;
 
     if (RARRAY(ary)->len == 0) return rb_str_new(0, 0);
-    if (!NIL_P(rb_output_fs)) sep = rb_output_fs;
-    else sep = rb_default_rs;
+    sep = rb_output_fs;
+#if 1
+    if (NIL_P(rb_output_fs)) sep = rb_default_rs; /* newline */
+#endif
     str = rb_ary_join(ary, sep);
     return str;
 }
diff --git a/eval.c b/eval.c
index e2cf759138..d1b8322495 100644
--- a/eval.c
+++ b/eval.c
@@ -5679,10 +5679,18 @@ rb_mod_modfunc(argc, argv, module)
 
     set_method_visibility(module, argc, argv, NOEX_PRIVATE);
     for (i=0; i<argc; i++) {
+	VALUE m = module;
+
 	id = rb_to_id(argv[i]);
-	body = search_method(module, id, 0);
-	if (body == 0 || body->nd_body == 0) {
-	    rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
+	for (;;) {
+	    body = search_method(m, id, &m);
+	    if (body == 0 || body->nd_body == 0) {
+		rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
+	    }
+	    if (nd_type(body->nd_body) != NODE_ZSUPER) {
+		break;		/* normal case: need not to follow 'super' link */
+	    }
+	    m = RCLASS(m)->super;
 	}
 	rb_add_method(rb_singleton_class(module), id, body->nd_body, NOEX_PUBLIC);
 	rb_clear_cache_by_id(id);
diff --git a/gc.c b/gc.c
index 90326e2d3a..effb38eccd 100644
--- a/gc.c
+++ b/gc.c
@@ -20,6 +20,11 @@
 #include "re.h"
 #include <stdio.h>
 #include <setjmp.h>
+#include <sys/types.h>
+
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
 
 #ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
diff --git a/parse.y b/parse.y
index 0981a4a74b..944df300da 100644
--- a/parse.y
+++ b/parse.y
@@ -4028,19 +4028,16 @@ str_extend(list, term)
 		break;
 	      case '{':
 		if (brace != -1) nest++;
-	      case '\"':
-	      case '/':
-	      case '`':
+	      default:
 		if (c == term) {
 		    pushback(c);
 		    list_append(list, NEW_STR(rb_str_new2("#")));
-		    rb_warning("bad substitution in string");
+		    rb_warn("bad substitution in string");
 		    tokfix();
 		    list_append(list, NEW_STR(rb_str_new(tok(), toklen())));
 		    newtok();
 		    return list;
 		}
-	      default:
 		tokadd(c);
 		break;
 	    }
diff --git a/string.c b/string.c
index 1c45632b7a..1e55148f47 100644
--- a/string.c
+++ b/string.c
@@ -1018,7 +1018,7 @@ rb_str_succ(orig)
 	}
     }
     if (s < sbeg) {
-	REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len + 1);
+	REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len + 2);
 	s = RSTRING(str)->ptr + n;
 	memmove(s+1, s, RSTRING(str)->len - n);
 	*s = c;