diff --git a/ChangeLog b/ChangeLog
index c6518a7741..69326a226f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+Wed Aug 29 02:18:53 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* parse.y (yylex): ternary ? can be followed by newline.
+
+Tue Aug 28 00:40:48 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (rb_f_require): should check static linked libraries
+	  before raising exception.
+
+Fri Aug 24 15:17:40 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* array.c (rb_ary_equal): check identiry equality first.
+
+	* string.c (rb_str_equal): ditto.
+
+	* struct.c (rb_struct_equal): ditto.
+
 Fri Aug 24 14:38:17 2001  Usaku Nakamura  <usa@ruby-lang.org>
 
 	* dln.c (dln_strerror): fix a bug that sometimes made null message on
@@ -5,6 +22,18 @@ Fri Aug 24 14:38:17 2001  Usaku Nakamura  <usa@ruby-lang.org>
 
 	* win32/win32.c (mystrerror): ditto.
 
+Fri Aug 24 03:15:07 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* numeric.c (Init_Numeric): undef Integer::new.
+
+Fri Aug 24 00:46:44 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (rb_eval): NODE_WHILE should update result for each
+	  conditional evaluation.
+
+	* eval.c (rb_eval): NODE_UNTIL should return last evaluated value
+	  (or value given to break).
+
 Thu Aug 23 21:59:38 2001  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
 
 	* enum.c (sort_by_i): fix typo.
diff --git a/array.c b/array.c
index 66f61fcb1d..6e085ae923 100644
--- a/array.c
+++ b/array.c
@@ -1388,6 +1388,7 @@ rb_ary_equal(ary1, ary2)
 {
     long i;
 
+    if (ary1 == ary2) return Qtrue;
     if (TYPE(ary2) != T_ARRAY) return Qfalse;
     if (RARRAY(ary1)->len != RARRAY(ary2)->len) return Qfalse;
     for (i=0; i<RARRAY(ary1)->len; i++) {
diff --git a/bignum.c b/bignum.c
index 489514451a..57a6958047 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1420,8 +1420,6 @@ Init_Bignum()
 {
     rb_cBignum = rb_define_class("Bignum", rb_cInteger);
 
-    rb_undef_method(CLASS_OF(rb_cBignum), "new");
-
     rb_define_method(rb_cBignum, "to_s", rb_big_to_s, 0);
     rb_define_method(rb_cBignum, "coerce", rb_big_coerce, 1);
     rb_define_method(rb_cBignum, "-@", rb_big_uminus, 0);
diff --git a/doc/NEWS b/doc/NEWS
index 18c532a1e0..113e4545e1 100644
--- a/doc/NEWS
+++ b/doc/NEWS
@@ -1,3 +1,11 @@
+: Enum#sort_by
+
+  Added.
+
+: Signal
+
+  new module, has module functions Signal::trap and Signal::list.
+
 : Curses
 
   Updated.  New methods and constants for using the mouse, character
diff --git a/eval.c b/eval.c
index f88510e15c..0ca486c207 100644
--- a/eval.c
+++ b/eval.c
@@ -2280,7 +2280,7 @@ rb_eval(self, n)
 		rb_eval(self, node->nd_body);
 	      while_next:
 		;
-	    } while (RTEST(rb_eval(self, node->nd_cond)));
+	    } while (RTEST(result = rb_eval(self, node->nd_cond)));
 	    break;
 
 	  case TAG_REDO:
@@ -2311,7 +2311,7 @@ rb_eval(self, n)
 		rb_eval(self, node->nd_body);
 	      until_next:
 		;
-	    } while (!RTEST(rb_eval(self, node->nd_cond)));
+	    } while (!RTEST(result = rb_eval(self, node->nd_cond)));
 	    break;
 
 	  case TAG_REDO:
@@ -2329,7 +2329,7 @@ rb_eval(self, n)
       until_out:
 	POP_TAG();
 	if (state) JUMP_TAG(state);
-	RETURN(Qnil);
+	RETURN(result);
 
       case NODE_BLOCK_PASS:
 	result = block_pass(self, node);
@@ -3976,7 +3976,7 @@ handle_rescue(self, node)
 	if (!rb_obj_is_kind_of(argv[0], rb_cModule)) {
 	    rb_raise(rb_eTypeError, "class or module required for rescue clause");
 	}
-	if (rb_funcall(*argv, eqq, 1, ruby_errinfo)) return 1;
+	if (RTEST(rb_funcall(*argv, eqq, 1, ruby_errinfo))) return 1;
 	argv++;
     }
     return 0;
@@ -5494,6 +5494,8 @@ rb_f_require(obj, fname)
 	fname = rb_find_file(tmp);
 	goto load_dyna;
     }
+    if (rb_feature_p(RSTRING(fname)->ptr, Qfalse))
+	return Qfalse;
     rb_raise(rb_eLoadError, "No such file to load -- %s", RSTRING(fname)->ptr);
 
   load_dyna:
@@ -8329,9 +8331,6 @@ rb_thread_start_0(fn, arg, th_arg)
     while (saved_block) {
 	struct BLOCK *tmp = saved_block;
 
-	if (curr_thread == main_thread) {
-	    printf("free(%p)\n", saved_block);
-	}
 	if (tmp->frame.argc > 0)
 	    free(tmp->frame.argv);
 	saved_block = tmp->prev;
diff --git a/ext/extmk.rb.in b/ext/extmk.rb.in
index b97902e3fc..72db3db403 100644
--- a/ext/extmk.rb.in
+++ b/ext/extmk.rb.in
@@ -740,7 +740,7 @@ if $extlist.size > 0
     if File.exist?(f)
       $extinit += format("\
 \tInit_%s();\n\
-\trb_provide(\"%s.so\");\n\
+\trb_provide(\"%s\");\n\
 ", t, s)
       $extobjs += "ext/"
       $extobjs += f
diff --git a/intern.h b/intern.h
index fe08ea49f5..3f25ae8d44 100644
--- a/intern.h
+++ b/intern.h
@@ -357,6 +357,7 @@ VALUE rb_struct_alloc _((VALUE, VALUE));
 VALUE rb_struct_aref _((VALUE, VALUE));
 VALUE rb_struct_aset _((VALUE, VALUE, VALUE));
 VALUE rb_struct_getmember _((VALUE, ID));
+VALUE rb_struct_iv_get _((VALUE, char*));
 /* time.c */
 VALUE rb_time_new(ANYARGS);
 /* variable.c */
diff --git a/marshal.c b/marshal.c
index 5a8e4232b0..8caad612c2 100644
--- a/marshal.c
+++ b/marshal.c
@@ -26,7 +26,7 @@ typedef unsigned short BDIGIT;
 #define SIZEOF_BDIGITS SIZEOF_SHORT
 #endif
 
-#define BITSPERSHORT (sizeof(short)*CHAR_BIT)
+#define BITSPERSHORT (2*CHAR_BIT)
 #define SHORTMASK ((1<<BITSPERSHORT)-1)
 #define SHORTDN(x) RSHIFT(x,BITSPERSHORT)
 
@@ -46,7 +46,7 @@ shortlen(len, ds)
 	num = SHORTDN(num);
 	offset++;
     }
-    return (len - 1)*sizeof(BDIGIT)/sizeof(short) + offset;
+    return (len - 1)*sizeof(BDIGIT)/2 + offset;
 }
 #define SHORTLEN(x) shortlen((x),d)
 #endif
@@ -129,11 +129,8 @@ w_short(x, arg)
     int x;
     struct dump_arg *arg;
 {
-    int i;
-
-    for (i=0; i<sizeof(short); i++) {
-	w_byte((x >> (i*8)) & 0xff, arg);
-    }
+    w_byte((x >> 0) & 0xff, arg);
+    w_byte((x >> 8) & 0xff, arg);
 }
 
 static void
@@ -145,7 +142,7 @@ w_long(x, arg)
     int i, len = 0;
 
 #if SIZEOF_LONG > 4
-    if (!(RSHIFT(x, 32) == 0 || RSHIFT(x, 32) == -1)) {
+    if (!(RSHIFT(x, 31) == 0 || RSHIFT(x, 31) == -1)) {
 	/* big long does not fit in 4 bytes */
 	rb_raise(rb_eTypeError, "long too big to dump");
     }
@@ -452,7 +449,7 @@ w_object(obj, arg, limit)
 
 		w_unique(rb_class2name(CLASS_OF(obj)), arg);
 		w_long(len, arg);
-		mem = rb_ivar_get(rb_obj_class(obj), rb_intern("__member__"));
+		mem = rb_struct_iv_get(rb_obj_class(obj), "__member__");
 		if (mem == Qnil) {
 		    rb_raise(rb_eTypeError, "uninitialized struct");
 		}
@@ -601,12 +598,9 @@ r_short(arg)
     struct load_arg *arg;
 {
     unsigned short x;
-    int i;
 
-    x = 0;
-    for (i=0; i<sizeof(short); i++) {
-	x |= r_byte(arg)<<(i*8);
-    }
+    x =  r_byte(arg);
+    x |= r_byte(arg)<<8;
 
     return x;
 }
@@ -619,13 +613,21 @@ long_toobig(size)
 	     sizeof(long), size);
 }
 
+#undef SIGN_EXTEND_CHAR
+#if __STDC__
+# define SIGN_EXTEND_CHAR(c) ((signed char)(c))
+#else  /* not __STDC__ */
+/* As in Harbison and Steele.  */
+# define SIGN_EXTEND_CHAR(c) ((((unsigned char)(c)) ^ 128) - 128)
+#endif
+
 static long
 r_long(arg)
     struct load_arg *arg;
 {
     register long x;
-    int c = (char)r_byte(arg);
-    int i;
+    int c = SIGN_EXTEND_CHAR(r_byte(arg));
+    long i;
 
     if (c == 0) return 0;
     if (c > 0) {
@@ -646,7 +648,7 @@ r_long(arg)
 	if (c > sizeof(long)) long_toobig(c);
 	x = -1;
 	for (i=0;i<c;i++) {
-	    x &= ~(0xff << (8*i));
+	    x &= ~((long)0xff << (8*i));
 	    x |= (long)r_byte(arg) << (8*i);
 	}
     }
@@ -795,7 +797,8 @@ r_object(arg)
 	{
 	    VALUE c = rb_path2class(r_unique(arg));
 	    v = r_object(arg);
-	    if (rb_special_const_p(v)) {
+	    if (rb_special_const_p(v) ||
+		!RTEST(rb_funcall(c, rb_intern("==="), 1, v))) {
 		rb_raise(rb_eArgError, "dump format error (user class)");
 	    }
 	    RBASIC(v)->klass = c;
@@ -838,7 +841,7 @@ r_object(arg)
 #if SIZEOF_BDIGITS == SIZEOF_SHORT
 	    big->len = len;
 #else
-	    big->len = (len + 1) * sizeof(short) / sizeof(BDIGIT);
+	    big->len = (len + 1) * 2 / sizeof(BDIGIT);
 #endif
 	    big->digits = digits = ALLOC_N(BDIGIT, big->len);
 	    while (len > 0) {
@@ -847,7 +850,7 @@ r_object(arg)
 		int shift = 0;
 		int i;
 
-		for (i=0; i<SIZEOF_BDIGITS; i+=sizeof(short)) {
+		for (i=0; i<SIZEOF_BDIGITS; i+=2) {
 		    int j = r_short(arg);
 		    num |= j << shift;
 		    shift += BITSPERSHORT;
diff --git a/misc/ruby-mode.el b/misc/ruby-mode.el
index 365311e3ed..2f53e36840 100644
--- a/misc/ruby-mode.el
+++ b/misc/ruby-mode.el
@@ -672,19 +672,19 @@ An end of a defun is found by moving forward from the beginning of one."
 		       ;; #{ }, #$hoge, #@foo are not comments
 		       ("\\(#\\)[{$@]" 1 (1 . nil))
 		       ;; the last $' in the string ,'...$' is not variable    
-		       ("\\(^\\|[[\\s <+(,]\\)\\('\\)[^'\n\\\\]*\\(\\\\.[^'\n\\\\]*\\)*\\$\\('\\)"
+		       ("\\(^\\|[[\\s <+(,]\\)\\('\\)[^'\n\\\\]*\\(\\\\.[^'\n\\\\]*\\)*[\\?\\$]\\('\\)"
 			(2 (7 . nil))
 			(4 (7 . nil)))	
 		       ;; the last $` in the string ,`...$` is not variable   
-		       ("\\(^\\|[[\\s <+(,]\\)\\(`\\)[^`\n\\\\]*\\(\\\\.[^`\n\\\\]*\\)*\\$\\(`\\)"
+		       ("\\(^\\|[[\\s <+(,]\\)\\(`\\)[^`\n\\\\]*\\(\\\\.[^`\n\\\\]*\\)*[\\?\\$]\\(`\\)"
 			(2 (7 . nil))
 			(4 (7 . nil)))
 		       ;; the last $" in the string ,"...$" is not variable   
-		       ("\\(^\\|[[\\s <+(,]\\)\\(\"\\)[^\"\n\\\\]*\\(\\\\.[^\"\n\\\\]*\\)*\\$\\(\"\\)"
+		       ("\\(^\\|[[\\s <+(,]\\)\\(\"\\)[^\"\n\\\\]*\\(\\\\.[^\"\n\\\\]*\\)*[\\?\\$]\\(\"\\)"
 			(2 (7 . nil))
 			(4 (7 . nil)))
 		       ;; $' $" $` .... are variables
-		       ("\\$[#\"'`$\\]" 0 (1 . nil))
+		       ("[\\?\\$][#\"'`]" 0 (1 . nil))
 		       ;; regexps 
 		       ("\\(^\\|[=(,~?:;]\\|\\(^\\|\\s \\)\\(if\\|elsif\\|unless\\|while\\|until\\|when\\|and\\|or\\|&&\\|||\\)\\|g?sub!?\\|scan\\|split!?\\)\\s *\\(/\\)[^/\n\\\\]*\\(\\\\.[^/\n\\\\]*\\)*\\(/\\)"
 			(4 (7 . ?/))
@@ -714,12 +714,12 @@ An end of a defun is found by moving forward from the beginning of one."
     (let (beg)
       (save-excursion
 	(if (and (re-search-backward "^=\\(begin\\|end\\)\\(\\s \\|$\\)" nil t)
-		 (string= (match-string-no-properties 1) "begin"))
+		 (string= (match-string 1) "begin"))
 	    (progn
 	      (beginning-of-line)
 	      (setq beg (point)))))
       (if (and beg (and (re-search-forward "^=\\(begin\\|end\\)\\(\\s \\|$\\)" nil t)
-			(string= (match-string-no-properties 1) "end")))
+			(string= (match-string 1) "end")))
 	  (progn
 	    (set-match-data (list beg (point)))
 	    t)
diff --git a/numeric.c b/numeric.c
index 5bce29adbe..c98a0e3fe0 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1566,6 +1566,8 @@ Init_Numeric()
     rb_define_method(rb_cNumeric, "truncate", num_truncate, 0);
 
     rb_cInteger = rb_define_class("Integer", rb_cNumeric);
+    rb_undef_method(CLASS_OF(rb_cInteger), "new");
+
     rb_define_method(rb_cInteger, "integer?", int_int_p, 0);
     rb_define_method(rb_cInteger, "upto", int_upto, 1);
     rb_define_method(rb_cInteger, "downto", int_downto, 1);
@@ -1587,8 +1589,6 @@ Init_Numeric()
     rb_define_singleton_method(rb_cFixnum, "induced_from", rb_fix_induced_from, 1);
     rb_define_singleton_method(rb_cInteger, "induced_from", rb_int_induced_from, 1);
 
-    rb_undef_method(CLASS_OF(rb_cFixnum), "new");
-
     rb_define_method(rb_cFixnum, "to_s", fix_to_s, 0);
     rb_define_method(rb_cFixnum, "type", fix_type, 0);
 
diff --git a/parse.y b/parse.y
index 17361cd5d9..60d386b239 100644
--- a/parse.y
+++ b/parse.y
@@ -3082,7 +3082,7 @@ yylex()
 	    return '?';
 	}
 	c = nextc();
-	if (c == -1 || c == 10) {
+	if (c == -1) {
 	    rb_compile_error("incomplete character syntax");
 	    return 0;
 	}
diff --git a/prec.c b/prec.c
index 3d33fe55f1..436b4d5bbc 100644
--- a/prec.c
+++ b/prec.c
@@ -51,7 +51,7 @@ prec_induced_from(module, x)
 }
 
 static VALUE
-prec_append_features(module, include)
+prec_included(module, include)
     VALUE module, include;
 {
     switch (TYPE(include)) {
@@ -62,7 +62,6 @@ prec_append_features(module, include)
        Check_Type(include, T_CLASS);
        break;
     }
-    rb_include_module(include, module);
     rb_define_singleton_method(include, "induced_from", prec_induced_from, 1);
     return module;
 }
@@ -72,7 +71,7 @@ void
 Init_Precision()
 {
     rb_mPrecision = rb_define_module("Precision");
-    rb_define_singleton_method(rb_mPrecision, "append_features", prec_append_features, 1);
+    rb_define_singleton_method(rb_mPrecision, "included", prec_included, 1);
     rb_define_method(rb_mPrecision, "prec", prec_prec, 1);
     rb_define_method(rb_mPrecision, "prec_i", prec_prec_i, 0);
     rb_define_method(rb_mPrecision, "prec_f", prec_prec_f, 0);
diff --git a/string.c b/string.c
index 45f768c53d..78126da285 100644
--- a/string.c
+++ b/string.c
@@ -694,6 +694,7 @@ static VALUE
 rb_str_equal(str1, str2)
     VALUE str1, str2;
 {
+    if (str1 == str2) return Qtrue;
     if (TYPE(str2) != T_STRING)
 	return Qfalse;
 
diff --git a/struct.c b/struct.c
index d489026b3f..d6613d95e0 100644
--- a/struct.c
+++ b/struct.c
@@ -16,19 +16,19 @@ VALUE rb_cStruct;
 
 static VALUE struct_alloc _((int, VALUE*, VALUE));
 
-static VALUE
-iv_get(obj, name)
-    VALUE obj;
+VALUE
+rb_struct_iv_get(c, name)
+    VALUE c;
     char *name;
 {
     ID id;
 
     id = rb_intern(name);
     for (;;) {
-	if (rb_ivar_defined(obj, id))
-	    return rb_ivar_get(obj, id);
-	obj = RCLASS(obj)->super;
-	if (obj == 0 || obj == rb_cStruct)
+	if (rb_ivar_defined(c, id))
+	    return rb_ivar_get(c, id);
+	c = RCLASS(c)->super;
+	if (c == 0 || c == rb_cStruct)
 	    return Qnil;
     }
 }
@@ -40,7 +40,7 @@ rb_struct_s_members(obj)
     VALUE member, ary;
     VALUE *p, *pend;
 
-    member = iv_get(obj, "__member__");
+    member = rb_struct_iv_get(obj, "__member__");
     if (NIL_P(member)) {
 	rb_bug("uninitialized struct");
     }
@@ -69,7 +69,7 @@ rb_struct_getmember(obj, id)
     VALUE member, slot;
     long i;
 
-    member = iv_get(rb_obj_class(obj), "__member__");
+    member = rb_struct_iv_get(rb_obj_class(obj), "__member__");
     if (NIL_P(member)) {
 	rb_bug("uninitialized struct");
     }
@@ -130,7 +130,7 @@ rb_struct_set(obj, val)
     VALUE member, slot;
     long i;
 
-    member = iv_get(rb_obj_class(obj), "__member__");
+    member = rb_struct_iv_get(rb_obj_class(obj), "__member__");
     if (NIL_P(member)) {
 	rb_bug("non-initialized struct");
     }
@@ -255,7 +255,7 @@ rb_struct_initialize(self, values)
     long n;
 
     rb_struct_modify(self);
-    size = iv_get(klass, "__size__");
+    size = rb_struct_iv_get(klass, "__size__");
     n = FIX2LONG(size);
     if (n < RARRAY(values)->len) {
 	rb_raise(rb_eArgError, "struct size differs");
@@ -280,7 +280,7 @@ struct_alloc(argc, argv, klass)
     NEWOBJ(st, struct RStruct);
     OBJSETUP(st, klass, T_STRUCT);
 
-    size = iv_get(klass, "__size__");
+    size = rb_struct_iv_get(klass, "__size__");
     n = FIX2LONG(size);
 
     st->ptr = ALLOC_N(VALUE, n);
@@ -311,7 +311,7 @@ rb_struct_new(klass, va_alist)
     long size, i;
     va_list args;
 
-    sz = iv_get(klass, "__size__");
+    sz = rb_struct_iv_get(klass, "__size__");
     size = FIX2LONG(sz); 
     mem = ALLOCA_N(VALUE, size);
     va_init_list(args, klass);
@@ -355,7 +355,7 @@ inspect_struct(s)
     VALUE str, member;
     long i;
 
-    member = iv_get(rb_obj_class(s), "__member__");
+    member = rb_struct_iv_get(rb_obj_class(s), "__member__");
     if (NIL_P(member)) {
 	rb_bug("non-initialized struct");
     }
@@ -426,7 +426,7 @@ rb_struct_aref_id(s, id)
     VALUE member;
     long i, len;
 
-    member = iv_get(rb_obj_class(s), "__member__");
+    member = rb_struct_iv_get(rb_obj_class(s), "__member__");
     if (NIL_P(member)) {
 	rb_bug("non-initialized struct");
     }
@@ -470,7 +470,7 @@ rb_struct_aset_id(s, id, val)
     VALUE member;
     long i, len;
 
-    member = iv_get(rb_obj_class(s), "__member__");
+    member = rb_struct_iv_get(rb_obj_class(s), "__member__");
     if (NIL_P(member)) {
 	rb_bug("non-initialized struct");
     }
@@ -516,6 +516,7 @@ rb_struct_equal(s, s2)
 {
     long i;
 
+    if (s == s2) return Qtrue;
     if (TYPE(s2) != T_STRUCT) return Qfalse;
     if (rb_obj_class(s) != rb_obj_class(s2)) return Qfalse;
     if (RSTRUCT(s)->len != RSTRUCT(s2)->len) {
diff --git a/version.h b/version.h
index 33f7b376cf..fb48826cd8 100644
--- a/version.h
+++ b/version.h
@@ -1,4 +1,4 @@
 #define RUBY_VERSION "1.7.1"
-#define RUBY_RELEASE_DATE "2001-08-24"
+#define RUBY_RELEASE_DATE "2001-08-29"
 #define RUBY_VERSION_CODE 171
-#define RUBY_RELEASE_CODE 20010824
+#define RUBY_RELEASE_CODE 20010829