diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 544bed5298cfc6..4e8536fc606bc0 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -706,8 +706,6 @@ def %(s) s || self end
 
   have_func("pthread_create")
   have_func("pthread_detach")
-  have_func("pthread_attr_setaffinity_np")
-  have_func("sched_getcpu")
 
   $VPATH << '$(topdir)' << '$(top_srcdir)'
   create_makefile("socket")
diff --git a/ext/socket/raddrinfo.c b/ext/socket/raddrinfo.c
index 9747f940369967..560312741f6820 100644
--- a/ext/socket/raddrinfo.c
+++ b/ext/socket/raddrinfo.c
@@ -461,7 +461,7 @@ cancel_getaddrinfo(void *ptr)
 }
 
 static int
-do_pthread_create(pthread_t *th, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg)
+do_pthread_create(pthread_t *th, void *(*start_routine) (void *), void *arg)
 {
     int limit = 3, ret;
     do {
@@ -469,7 +469,7 @@ do_pthread_create(pthread_t *th, const pthread_attr_t *attr, void *(*start_routi
         //
         // https://bugs.openjdk.org/browse/JDK-8268605
         // https://github.com/openjdk/jdk/commit/e35005d5ce383ddd108096a3079b17cb0bcf76f1
-        ret = pthread_create(th, attr, start_routine, arg);
+        ret = pthread_create(th, 0, start_routine, arg);
     } while (ret == EAGAIN && limit-- > 0);
     return ret;
 }
@@ -489,23 +489,8 @@ rb_getaddrinfo(const char *hostp, const char *portp, const struct addrinfo *hint
         return EAI_MEMORY;
     }
 
-    pthread_attr_t attr;
-    if (pthread_attr_init(&attr) != 0) {
-        free_getaddrinfo_arg(arg);
-        return EAI_AGAIN;
-    }
-#if defined(HAVE_PTHREAD_ATTR_SETAFFINITY_NP) && defined(HAVE_SCHED_GETCPU)
-    cpu_set_t tmp_cpu_set;
-    CPU_ZERO(&tmp_cpu_set);
-    int cpu = sched_getcpu();
-    if (cpu < CPU_SETSIZE) {
-        CPU_SET(cpu, &tmp_cpu_set);
-        pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &tmp_cpu_set);
-    }
-#endif
-
     pthread_t th;
-    if (do_pthread_create(&th, &attr, do_getaddrinfo, arg) != 0) {
+    if (do_pthread_create(&th, do_getaddrinfo, arg) != 0) {
         free_getaddrinfo_arg(arg);
         return EAI_AGAIN;
     }
@@ -716,23 +701,8 @@ rb_getnameinfo(const struct sockaddr *sa, socklen_t salen,
         return EAI_MEMORY;
     }
 
-    pthread_attr_t attr;
-    if (pthread_attr_init(&attr) != 0) {
-        free_getnameinfo_arg(arg);
-        return EAI_AGAIN;
-    }
-#if defined(HAVE_PTHREAD_ATTR_SETAFFINITY_NP) && defined(HAVE_SCHED_GETCPU)
-    cpu_set_t tmp_cpu_set;
-    CPU_ZERO(&tmp_cpu_set);
-    int cpu = sched_getcpu();
-    if (cpu < CPU_SETSIZE) {
-        CPU_SET(cpu, &tmp_cpu_set);
-        pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &tmp_cpu_set);
-    }
-#endif
-
     pthread_t th;
-    if (do_pthread_create(&th, 0, do_getnameinfo, arg) != 0) {
+    if (do_pthread_create(&th, do_getnameinfo, arg) != 0) {
         free_getnameinfo_arg(arg);
         return EAI_AGAIN;
     }
diff --git a/gc.c b/gc.c
index 6d62ca293d5c46..6419f8ff258540 100644
--- a/gc.c
+++ b/gc.c
@@ -9749,10 +9749,6 @@ gc_enter_count(enum gc_enter_event event)
     }
 }
 
-#ifndef MEASURE_GC
-#define MEASURE_GC (objspace->flags.measure_gc)
-#endif
-
 static bool current_process_time(struct timespec *ts);
 
 static void
@@ -9822,12 +9818,18 @@ gc_exit(rb_objspace_t *objspace, enum gc_enter_event event, unsigned int *lock_l
     RB_VM_LOCK_LEAVE_LEV(lock_lev);
 }
 
+#ifndef MEASURE_GC
+#define MEASURE_GC (objspace->flags.measure_gc)
+#endif
+
 static void
 gc_marking_enter(rb_objspace_t *objspace)
 {
     GC_ASSERT(during_gc != 0);
 
-    gc_clock_start(&objspace->profile.marking_start_time);
+    if (MEASURE_GC) {
+        gc_clock_start(&objspace->profile.marking_start_time);
+    }
 }
 
 static void
@@ -9835,7 +9837,9 @@ gc_marking_exit(rb_objspace_t *objspace)
 {
     GC_ASSERT(during_gc != 0);
 
-    objspace->profile.marking_time_ns += gc_clock_end(&objspace->profile.marking_start_time);
+    if (MEASURE_GC) {
+        objspace->profile.marking_time_ns += gc_clock_end(&objspace->profile.marking_start_time);
+    }
 }
 
 static void
@@ -9843,7 +9847,9 @@ gc_sweeping_enter(rb_objspace_t *objspace)
 {
     GC_ASSERT(during_gc != 0);
 
-    gc_clock_start(&objspace->profile.sweeping_start_time);
+    if (MEASURE_GC) {
+        gc_clock_start(&objspace->profile.sweeping_start_time);
+    }
 }
 
 static void
@@ -9851,7 +9857,9 @@ gc_sweeping_exit(rb_objspace_t *objspace)
 {
     GC_ASSERT(during_gc != 0);
 
-    objspace->profile.sweeping_time_ns += gc_clock_end(&objspace->profile.sweeping_start_time);
+    if (MEASURE_GC) {
+        objspace->profile.sweeping_time_ns += gc_clock_end(&objspace->profile.sweeping_start_time);
+    }
 }
 
 static void *
diff --git a/gems/bundled_gems b/gems/bundled_gems
index 1977351ecf1178..ae0a1acc3d7570 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -11,10 +11,10 @@ rake            13.1.0  https://github.com/ruby/rake
 test-unit       3.6.1   https://github.com/test-unit/test-unit
 rexml           3.2.6   https://github.com/ruby/rexml
 rss             0.3.0   https://github.com/ruby/rss
-net-ftp         0.3.3   https://github.com/ruby/net-ftp
-net-imap        0.4.9   https://github.com/ruby/net-imap
+net-ftp         0.3.4   https://github.com/ruby/net-ftp
+net-imap        0.4.9.1   https://github.com/ruby/net-imap
 net-pop         0.1.2   https://github.com/ruby/net-pop
-net-smtp        0.4.0   https://github.com/ruby/net-smtp
+net-smtp        0.4.0.1   https://github.com/ruby/net-smtp
 matrix          0.4.2   https://github.com/ruby/matrix
 prime           0.1.2   https://github.com/ruby/prime
 rbs             3.4.0   https://github.com/ruby/rbs
diff --git a/hash.c b/hash.c
index 78e9d9a2d60c8b..b15d856ee19c36 100644
--- a/hash.c
+++ b/hash.c
@@ -1557,7 +1557,15 @@ hash_copy(VALUE ret, VALUE hash)
 static VALUE
 hash_dup_with_compare_by_id(VALUE hash)
 {
-    return hash_copy(copy_compare_by_id(rb_hash_new(), hash), hash);
+    VALUE dup = hash_alloc_flags(rb_cHash, 0, Qnil, RHASH_ST_TABLE_P(hash));
+    if (RHASH_ST_TABLE_P(hash)) {
+        RHASH_SET_ST_FLAG(dup);
+    }
+    else {
+        RHASH_UNSET_ST_FLAG(dup);
+    }
+
+    return hash_copy(dup, hash);
 }
 
 static VALUE
diff --git a/io_buffer.c b/io_buffer.c
index 3c47f659bcab28..7e580c86336118 100644
--- a/io_buffer.c
+++ b/io_buffer.c
@@ -42,6 +42,8 @@ enum {
 
     // This is used to validate the flags given by the user.
     RB_IO_BUFFER_FLAGS_MASK = RB_IO_BUFFER_EXTERNAL | RB_IO_BUFFER_INTERNAL | RB_IO_BUFFER_MAPPED | RB_IO_BUFFER_SHARED | RB_IO_BUFFER_LOCKED | RB_IO_BUFFER_PRIVATE | RB_IO_BUFFER_READONLY,
+
+    RB_IO_BUFFER_DEBUG = 0,
 };
 
 struct rb_io_buffer {
@@ -113,6 +115,7 @@ io_buffer_map_file(struct rb_io_buffer *buffer, int descriptor, size_t size, rb_
     }
 
     HANDLE mapping = CreateFileMapping(file, NULL, protect, 0, 0, NULL);
+    if (RB_IO_BUFFER_DEBUG) fprintf(stderr, "io_buffer_map_file:CreateFileMapping -> %p\n", mapping);
     if (!mapping) rb_sys_fail("io_buffer_map_descriptor:CreateFileMapping");
 
     void *base = MapViewOfFile(mapping, access, (DWORD)(offset >> 32), (DWORD)(offset & 0xFFFFFFFF), size);
@@ -213,9 +216,13 @@ io_buffer_initialize(VALUE self, struct rb_io_buffer *buffer, void *base, size_t
     buffer->size = size;
     buffer->flags = flags;
     RB_OBJ_WRITE(self, &buffer->source, source);
+
+#if defined(_WIN32)
+    buffer->mapping = NULL;
+#endif
 }
 
-static int
+static void
 io_buffer_free(struct rb_io_buffer *buffer)
 {
     if (buffer->base) {
@@ -247,18 +254,17 @@ io_buffer_free(struct rb_io_buffer *buffer)
         buffer->size = 0;
         buffer->flags = 0;
         buffer->source = Qnil;
-
-        return 1;
     }
 
 #if defined(_WIN32)
     if (buffer->mapping) {
-        CloseHandle(buffer->mapping);
+        if (RB_IO_BUFFER_DEBUG) fprintf(stderr, "io_buffer_free:CloseHandle -> %p\n", buffer->mapping);
+        if (!CloseHandle(buffer->mapping)) {
+            fprintf(stderr, "io_buffer_free:GetLastError -> %d\n", GetLastError());
+        }
         buffer->mapping = NULL;
     }
 #endif
-
-    return 0;
 }
 
 void
diff --git a/lib/bundled_gems.rb b/lib/bundled_gems.rb
index 0bb2a7cb621d94..55286725c0fb45 100644
--- a/lib/bundled_gems.rb
+++ b/lib/bundled_gems.rb
@@ -13,6 +13,7 @@ module Gem::BUNDLED_GEMS
     "net-pop" => "3.1.0",
     "net-smtp" => "3.1.0",
     "prime" => "3.1.0",
+    "racc" => "3.3.0",
     "abbrev" => "3.4.0",
     "base64" => "3.4.0",
     "bigdecimal" => "3.4.0",
@@ -22,7 +23,6 @@ module Gem::BUNDLED_GEMS
     "mutex_m" => "3.4.0",
     "nkf" => "3.4.0",
     "observer" => "3.4.0",
-    "racc" => "3.4.0",
     "resolv-replace" => "3.4.0",
     "rinda" => "3.4.0",
     "syslog" => "3.4.0",
diff --git a/lib/net/http.rb b/lib/net/http.rb
index 34ca0669ebeb03..387df4b8f4ef3d 100644
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@@ -722,7 +722,7 @@ class HTTPHeaderSyntaxError < StandardError; end
   class HTTP < Protocol
 
     # :stopdoc:
-    VERSION = "0.4.0"
+    VERSION = "0.4.1"
     HTTPVersion = '1.1'
     begin
       require 'zlib'
diff --git a/parse.y b/parse.y
index f8e21dc9a3c1d8..55a304bd2ddad4 100644
--- a/parse.y
+++ b/parse.y
@@ -3800,9 +3800,9 @@ args		: arg_value
                 | args ',' arg_splat
                     {
                     /*%%%*/
-                        $$ = rest_arg_append(p, $args, $arg_splat, &@$);
+                        $$ = rest_arg_append(p, $1, $3, &@$);
                     /*% %*/
-                    /*% ripper: args_add_star!($args, $arg_splat) %*/
+                    /*% ripper: args_add_star!($1, $3) %*/
                     }
                 ;
 
diff --git a/re.c b/re.c
index cb8cc865b267a9..bf4dc5ccbfa0f8 100644
--- a/re.c
+++ b/re.c
@@ -1747,15 +1747,18 @@ rb_reg_search_set_match(VALUE re, VALUE str, long pos, int reverse, int set_back
         .range = reverse ? 0 : len,
     };
 
-    VALUE match = match_alloc(rb_cMatch);
-    struct re_registers *regs = RMATCH_REGS(match);
+    struct re_registers regs = {0};
 
-    OnigPosition result = rb_reg_onig_match(re, str, reg_onig_search, &args, regs);
+    OnigPosition result = rb_reg_onig_match(re, str, reg_onig_search, &args, &regs);
     if (result == ONIG_MISMATCH) {
         rb_backref_set(Qnil);
         return ONIG_MISMATCH;
     }
 
+    VALUE match = match_alloc(rb_cMatch);
+    rb_matchext_t *rm = RMATCH_EXT(match);
+    rm->regs = regs;
+
     if (set_backref_str) {
         RB_OBJ_WRITE(match, &RMATCH(match)->str, rb_str_new4(str));
     }
diff --git a/regexec.c b/regexec.c
index 4b02e7f9b567e6..741fb41278eadf 100644
--- a/regexec.c
+++ b/regexec.c
@@ -542,7 +542,7 @@ init_cache_opcodes(const regex_t* reg, OnigCacheOpcode* cache_opcodes, long* num
     cache_opcodes->num_cache_points_at_outer_repeat = num_cache_points_at_repeat;\
     cache_opcodes->num_cache_points_in_outer_repeat = 0;\
     cache_opcodes->lookaround_nesting = lookaround_nesting;\
-    cache_point += lookaround_nesting > 0 ? 2 : 1;\
+    cache_point += lookaround_nesting != 0 ? 2 : 1;\
     cache_opcodes++;\
   } while (0)
 
@@ -3756,14 +3756,15 @@ match_at(regex_t* reg, const UChar* str, const UChar* end,
 
     CASE(OP_PUSH_IF_PEEK_NEXT)  MOP_IN(OP_PUSH_IF_PEEK_NEXT);
       GET_RELADDR_INC(addr, p);
+      CHECK_MATCH_CACHE;
       if (*p == *s) {
 	p++;
-	CHECK_MATCH_CACHE;
 	STACK_PUSH_ALT(p + addr, s, sprev, pkeep);
 	MOP_OUT;
 	JUMP;
       }
       p++;
+      INC_NUM_FAILS;
       MOP_OUT;
       JUMP;
 
diff --git a/test/net/fixtures/Makefile b/test/net/fixtures/Makefile
index b2bc9c7368ee2e..88c232e3b6c16b 100644
--- a/test/net/fixtures/Makefile
+++ b/test/net/fixtures/Makefile
@@ -5,11 +5,11 @@ regen_certs:
 	make server.crt
 
 cacert.pem: server.key
-	openssl req -new -x509 -days 1825 -key server.key -out cacert.pem -text -subj "/C=JP/ST=Shimane/L=Matz-e city/O=Ruby Core Team/CN=Ruby Test CA/emailAddress=security@ruby-lang.org"
+	openssl req -new -x509 -days 3650 -key server.key -out cacert.pem -subj "/C=JP/ST=Shimane/L=Matz-e city/O=Ruby Core Team/CN=Ruby Test CA/emailAddress=security@ruby-lang.org"
 
 server.csr:
-	openssl req -new -key server.key -out server.csr -text -subj "/C=JP/ST=Shimane/O=Ruby Core Team/OU=Ruby Test/CN=localhost"
+	openssl req -new -key server.key -out server.csr -subj "/C=JP/ST=Shimane/O=Ruby Core Team/OU=Ruby Test/CN=localhost"
 
 server.crt: server.csr cacert.pem
-	openssl x509 -days 1825 -CA cacert.pem -CAkey server.key -set_serial 00 -in server.csr -req -text -out server.crt
+	openssl x509 -days 3650 -CA cacert.pem -CAkey server.key -set_serial 00 -in server.csr -req -out server.crt
 	rm server.csr
diff --git a/test/net/fixtures/cacert.pem b/test/net/fixtures/cacert.pem
index f623bd62ed3758..24c83f1c652253 100644
--- a/test/net/fixtures/cacert.pem
+++ b/test/net/fixtures/cacert.pem
@@ -1,24 +1,24 @@
 -----BEGIN CERTIFICATE-----
-MIID7TCCAtWgAwIBAgIJAIltvxrFAuSnMA0GCSqGSIb3DQEBCwUAMIGMMQswCQYD
-VQQGEwJKUDEQMA4GA1UECAwHU2hpbWFuZTEUMBIGA1UEBwwLTWF0ei1lIGNpdHkx
-FzAVBgNVBAoMDlJ1YnkgQ29yZSBUZWFtMRUwEwYDVQQDDAxSdWJ5IFRlc3QgQ0Ex
-JTAjBgkqhkiG9w0BCQEWFnNlY3VyaXR5QHJ1YnktbGFuZy5vcmcwHhcNMTkwMTAy
-MDI1ODI4WhcNMjQwMTAxMDI1ODI4WjCBjDELMAkGA1UEBhMCSlAxEDAOBgNVBAgM
-B1NoaW1hbmUxFDASBgNVBAcMC01hdHotZSBjaXR5MRcwFQYDVQQKDA5SdWJ5IENv
-cmUgVGVhbTEVMBMGA1UEAwwMUnVieSBUZXN0IENBMSUwIwYJKoZIhvcNAQkBFhZz
-ZWN1cml0eUBydWJ5LWxhbmcub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
-CgKCAQEAznlbjRVhz1NlutHVrhcGnK8W0qug2ujKXv1njSC4U6nJF6py7I9EeehV
-SaKePyv+I9z3K1LnfUHOtUbdwdKC77yN66A6q2aqzu5q09/NSykcZGOIF0GuItYI
-3nvW3IqBddff2ffsyR+9pBjfb5AIPP08WowF9q4s1eGULwZc4w2B8PFhtxYANd7d
-BvGLXFlcufv9tDtzyRi4t7eqxCRJkZQIZNZ6DHHIJrNxejOILfHLarI12yk8VK6L
-2LG4WgGqyeePiRyd1o1MbuiAFYqAwpXNUbRKg5NaZGwBHZk8UZ+uFKt1QMBURO5R
-WFy1c349jbWszTqFyL4Lnbg9HhAowQIDAQABo1AwTjAdBgNVHQ4EFgQU9tEiKdU9
-I9derQyc5nWPnc34nVMwHwYDVR0jBBgwFoAU9tEiKdU9I9derQyc5nWPnc34nVMw
-DAYDVR0TBAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAQEAxj7F/u3C3fgq24N7hGRA
-of7ClFQxGmo/IGT0AISzW3HiVYiFaikKhbO1NwD9aBpD8Zwe62sCqMh8jGV/b0+q
-aOORnWYNy2R6r9FkASAglmdF6xn3bhgGD5ls4pCvcG9FynGnGc24g6MrjFNrBYUS
-2iIZsg36i0IJswo/Dy6HLphCms2BMCD3DeWtfjePUiTmQHJo6HsQIKP/u4N4Fvee
-uMBInei2M4VU74fLXbmKl1F9AEX7JDP3BKSZG19Ch5pnUo4uXM1uNTGsi07P4Y0s
-K44+SKBC0bYEFbDK0eQWMrX3kIhkPxyIWhxdq9/NqPYjShuSEAhA6CSpmRg0pqc+
-mA==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 -----END CERTIFICATE-----
diff --git a/test/net/fixtures/server.crt b/test/net/fixtures/server.crt
index 5ca78a6d146a00..5d2923795dabca 100644
--- a/test/net/fixtures/server.crt
+++ b/test/net/fixtures/server.crt
@@ -1,82 +1,21 @@
-Certificate:
-    Data:
-        Version: 3 (0x2)
-        Serial Number: 2 (0x2)
-    Signature Algorithm: sha256WithRSAEncryption
-        Issuer: C=JP, ST=Shimane, L=Matz-e city, O=Ruby Core Team, CN=Ruby Test CA/emailAddress=security@ruby-lang.org
-        Validity
-            Not Before: Jan  2 03:27:13 2019 GMT
-            Not After : Jan  1 03:27:13 2024 GMT
-        Subject: C=JP, ST=Shimane, O=Ruby Core Team, OU=Ruby Test, CN=localhost
-        Subject Public Key Info:
-            Public Key Algorithm: rsaEncryption
-                Public-Key: (2048 bit)
-                Modulus:
-                    00:e8:da:9c:01:2e:2b:10:ec:49:cd:5e:07:13:07:
-                    9c:70:9e:c6:74:bc:13:c2:e1:6f:c6:82:fd:e3:48:
-                    e0:2c:a5:68:c7:9e:42:de:60:54:65:e6:6a:14:57:
-                    7a:30:d0:cc:b5:b6:d9:c3:d2:df:c9:25:97:54:67:
-                    cf:f6:be:5e:cb:8b:ee:03:c5:e1:e2:f9:e7:f7:d1:
-                    0c:47:f0:b8:da:33:5a:ad:41:ad:e7:b5:a2:7b:b7:
-                    bf:30:da:60:f8:e3:54:a2:bc:3a:fd:1b:74:d9:dc:
-                    74:42:e9:29:be:df:ac:b4:4f:eb:32:f4:06:f1:e1:
-                    8c:4b:a8:8b:fb:29:e7:b1:bf:1d:01:ee:73:0f:f9:
-                    40:dc:d5:15:79:d9:c6:73:d0:c0:dd:cb:e4:da:19:
-                    47:80:c6:14:04:72:fd:9a:7c:8f:11:82:76:49:04:
-                    79:cc:f2:5c:31:22:95:13:3e:5d:40:a6:4d:e0:a3:
-                    02:26:7d:52:3b:bb:ed:65:a1:0f:ed:6b:b0:3c:d4:
-                    de:61:15:5e:d3:dd:68:09:9f:4a:57:a5:c2:a9:6d:
-                    86:92:c5:f4:a4:d4:b7:13:3b:52:63:24:05:e2:cc:
-                    e3:8a:3c:d4:35:34:2b:10:bb:58:72:e7:e1:8d:1d:
-                    74:8c:61:16:20:3d:d0:1c:4e:8f:6e:fd:fe:64:10:
-                    4f:41
-                Exponent: 65537 (0x10001)
-        X509v3 extensions:
-            X509v3 Basic Constraints: 
-                CA:FALSE
-            Netscape Comment: 
-                OpenSSL Generated Certificate
-            X509v3 Subject Key Identifier: 
-                ED:28:C2:7E:AB:4B:C8:E8:FE:55:6D:66:95:31:1C:2D:60:F9:02:36
-            X509v3 Authority Key Identifier: 
-                keyid:F6:D1:22:29:D5:3D:23:D7:5E:AD:0C:9C:E6:75:8F:9D:CD:F8:9D:53
-
-    Signature Algorithm: sha256WithRSAEncryption
-         1d:b8:c5:8b:72:41:20:65:ad:27:6f:15:63:06:26:12:8d:9c:
-         ad:ca:f4:db:97:b4:90:cb:ff:35:94:bb:2a:a7:a1:ab:1e:35:
-         2d:a5:3f:c9:24:b0:1a:58:89:75:3e:81:0a:2c:4f:98:f9:51:
-         fb:c0:a3:09:d0:0a:9b:e7:a2:b7:c3:60:40:c8:f4:6d:b2:6a:
-         56:12:17:4c:00:24:31:df:9c:60:ae:b1:68:54:a9:e6:b5:4a:
-         04:e6:92:05:86:d9:5a:dc:96:30:a5:58:de:14:99:0f:e5:15:
-         89:3e:9b:eb:80:e3:bd:83:c3:ea:33:35:4b:3e:2f:d3:0d:64:
-         93:67:7f:8d:f5:3f:0c:27:bc:37:5a:cc:d6:47:16:af:5a:62:
-         d2:da:51:f8:74:06:6b:24:ad:28:68:08:98:37:7d:ed:0e:ab:
-         1e:82:61:05:d0:ba:75:a0:ab:21:b0:9a:fd:2b:54:86:1d:0d:
-         1f:c2:d4:77:1f:72:26:5e:ad:8a:9f:09:36:6d:44:be:74:c2:
-         5a:3e:ff:5c:9d:75:d6:38:7b:c5:39:f9:44:6e:a1:d1:8e:ff:
-         63:db:c4:bb:c6:91:92:ca:5c:60:9b:1d:eb:0a:de:08:ee:bf:
-         da:76:03:65:62:29:8b:f8:7f:c7:86:73:1e:f6:1f:2d:89:69:
-         fd:be:bd:6e
 -----BEGIN CERTIFICATE-----
-MIID4zCCAsugAwIBAgIBAjANBgkqhkiG9w0BAQsFADCBjDELMAkGA1UEBhMCSlAx
-EDAOBgNVBAgMB1NoaW1hbmUxFDASBgNVBAcMC01hdHotZSBjaXR5MRcwFQYDVQQK
-DA5SdWJ5IENvcmUgVGVhbTEVMBMGA1UEAwwMUnVieSBUZXN0IENBMSUwIwYJKoZI
-hvcNAQkBFhZzZWN1cml0eUBydWJ5LWxhbmcub3JnMB4XDTE5MDEwMjAzMjcxM1oX
-DTI0MDEwMTAzMjcxM1owYDELMAkGA1UEBhMCSlAxEDAOBgNVBAgMB1NoaW1hbmUx
-FzAVBgNVBAoMDlJ1YnkgQ29yZSBUZWFtMRIwEAYDVQQLDAlSdWJ5IFRlc3QxEjAQ
-BgNVBAMMCWxvY2FsaG9zdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
-AOjanAEuKxDsSc1eBxMHnHCexnS8E8Lhb8aC/eNI4CylaMeeQt5gVGXmahRXejDQ
-zLW22cPS38kll1Rnz/a+XsuL7gPF4eL55/fRDEfwuNozWq1Bree1onu3vzDaYPjj
-VKK8Ov0bdNncdELpKb7frLRP6zL0BvHhjEuoi/sp57G/HQHucw/5QNzVFXnZxnPQ
-wN3L5NoZR4DGFARy/Zp8jxGCdkkEeczyXDEilRM+XUCmTeCjAiZ9Uju77WWhD+1r
-sDzU3mEVXtPdaAmfSlelwqlthpLF9KTUtxM7UmMkBeLM44o81DU0KxC7WHLn4Y0d
-dIxhFiA90BxOj279/mQQT0ECAwEAAaN7MHkwCQYDVR0TBAIwADAsBglghkgBhvhC
-AQ0EHxYdT3BlblNTTCBHZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYEFO0o
-wn6rS8jo/lVtZpUxHC1g+QI2MB8GA1UdIwQYMBaAFPbRIinVPSPXXq0MnOZ1j53N
-+J1TMA0GCSqGSIb3DQEBCwUAA4IBAQAduMWLckEgZa0nbxVjBiYSjZytyvTbl7SQ
-y/81lLsqp6GrHjUtpT/JJLAaWIl1PoEKLE+Y+VH7wKMJ0Aqb56K3w2BAyPRtsmpW
-EhdMACQx35xgrrFoVKnmtUoE5pIFhtla3JYwpVjeFJkP5RWJPpvrgOO9g8PqMzVL
-Pi/TDWSTZ3+N9T8MJ7w3WszWRxavWmLS2lH4dAZrJK0oaAiYN33tDqsegmEF0Lp1
-oKshsJr9K1SGHQ0fwtR3H3ImXq2Knwk2bUS+dMJaPv9cnXXWOHvFOflEbqHRjv9j
-28S7xpGSylxgmx3rCt4I7r/adgNlYimL+H/HhnMe9h8tiWn9vr1u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 -----END CERTIFICATE-----
diff --git a/test/net/fixtures/server.key b/test/net/fixtures/server.key
index 7f2380e71e637b..6a83d5bcf4a521 100644
--- a/test/net/fixtures/server.key
+++ b/test/net/fixtures/server.key
@@ -1,28 +1,27 @@
------BEGIN PRIVATE KEY-----
-MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDo2pwBLisQ7EnN
-XgcTB5xwnsZ0vBPC4W/Ggv3jSOAspWjHnkLeYFRl5moUV3ow0My1ttnD0t/JJZdU
-Z8/2vl7Li+4DxeHi+ef30QxH8LjaM1qtQa3ntaJ7t78w2mD441SivDr9G3TZ3HRC
-6Sm+36y0T+sy9Abx4YxLqIv7Keexvx0B7nMP+UDc1RV52cZz0MDdy+TaGUeAxhQE
-cv2afI8RgnZJBHnM8lwxIpUTPl1Apk3gowImfVI7u+1loQ/ta7A81N5hFV7T3WgJ
-n0pXpcKpbYaSxfSk1LcTO1JjJAXizOOKPNQ1NCsQu1hy5+GNHXSMYRYgPdAcTo9u
-/f5kEE9BAgMBAAECggEBAOHkwhc7DLh8IhTDNSW26oMu5OP2WU1jmiYAigDmf+OQ
-DBgrZj+JQBci8qINQxL8XLukSZn5hvQCLc7Kbyu1/wyEEUFDxSGGwwzclodr9kho
-LX2LDASPZrOSzD2+fPi2wTKmXKuS6Uc44OjQfZkYMNkz9r4Vkm8xGgOD3VipjIYX
-QXlhhdqkXZcNABsihCV52GKkDFSVm8jv95YJc5xhoYCy/3a4/qPdF0aT2R7oYUej
-hKrxVDskyooe8Zg/JTydZNV5GQEDmW01/K3r6XGT26oPi1AqMU1gtv/jkW56CRQQ
-1got8smnqM+AV7Slf9R6DauIPdQJ2S8wsr/o8ISBsOECgYEA9YrqEP2gAYSGFXRt
-liw0WI2Ant8BqXS6yvq1jLo/qWhLw/ph4Di73OQ2mpycVTpgfGr2wFPQR1XJ+0Fd
-U+Ir/C3Q7FK4VIGHK7B0zNvZr5tEjlFfeRezo2JMVw5YWeSagIFcSwK+KqCTH9qc
-pw/Eb8nB/4XNcpTZu7Fg0Wc+ooUCgYEA8sVaicn1Wxkpb45a4qfrA6wOr5xdJ4cC
-A5qs7vjX2OdPIQOmoQhdI7bCWFXZzF33wA4YCws6j5wRaySLIJqdms8Gl9QnODy1
-ZlA5gwKToBC/jqPmWAXSKb8EH7cHilaxU9OKnQ7CfwlGLHqjMtjrhR7KHlt3CVRs
-oRmvsjZVXI0CgYAmPedslAO6mMhFSSfULrhMXmV82OCqYrrA6EEkVNGbcdnzAOkD
-gfKIWabDd8bFY10po4Mguy0CHzNhBXIioWQWV5BlbhC1YKMLw+S9DzSdLAKGY9gJ
-xQ4+UQ3wtRQ/k+IYR413RUsW2oFvgZ3KSyNeAb9MK6uuv84VdG/OzVSs/QKBgQDn
-kap//l2EbObiWyaERunckdVcW0lcN+KK75J/TGwPoOwQsLvTpPe65kxRGGrtDsEQ
-uCDk/+v3KkZPLgdrrTAih9FhJ+PVN8tMcb+6IM4SA4fFFr/UPJEwct0LJ3oQ0grJ
-y+HPWFHb/Uurh7t99/4H98uR02sjQh1wOeEmm78mzQKBgQDm+LzGH0se6CXQ6cdZ
-g1JRZeXkDEsrW3hfAsW62xJQmXcWxBoblP9OamMY+A06rM5og3JbDk5Zm6JsOaA8
-wS2gw4ilp46jors4eQey8ux7kB9LzdBoDBBElnsbjLO8oBNZlVcYXg+6BOl/CUi7
-2whRF0FEjKA8ehrNhAq+VFfFNw==
------END PRIVATE KEY-----
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEAsPnoGUOnrpiSqt4XynxA+HRP7S+BSObI6qJ7fQAVSPtRkqso
+tWxQYLEYzNEx5ZSHTGypibVsJylvCfuToDTfMul8b/CZjP2Ob0LdpYrNH6l5hvFE
+89FU1nZQF15oVLOpUgA7wGiHuEVawrGfey92UE68mOyUVXGweJIVDdxqdMoPvNNU
+l86BU02vlBiESxOuox+dWmuVV7vfYZ79Toh/LUK43YvJh+rhv4nKuF7iHjVjBd9s
+B6iDjj70HFldzOQ9r8SRI+9NirupPTkF5AKNe6kUhKJ1luB7S27ZkvB3tSTT3P59
+3VVJvnzOjaA1z6Cz+4+eRvcysqhrRgFlwI9TEwIDAQABAoIBAEEYiyDP29vCzx/+
+dS3LqnI5BjUuJhXUnc6AWX/PCgVAO+8A+gZRgvct7PtZb0sM6P9ZcLrweomlGezI
+FrL0/6xQaa8bBr/ve/a8155OgcjFo6fZEw3Dz7ra5fbSiPmu4/b/kvrg+Br1l77J
+aun6uUAs1f5B9wW+vbR7tzbT/mxaUeDiBzKpe15GwcvbJtdIVMa2YErtRjc1/5B2
+BGVXyvlJv0SIlcIEMsHgnAFOp1ZgQ08aDzvilLq8XVMOahAhP1O2A3X8hKdXPyrx
+IVWE9bS9ptTo+eF6eNl+d7htpKGEZHUxinoQpWEBTv+iOoHsVunkEJ3vjLP3lyI/
+fY0NQ1ECgYEA3RBXAjgvIys2gfU3keImF8e/TprLge1I2vbWmV2j6rZCg5r/AS0u
+pii5CvJ5/T5vfJPNgPBy8B/yRDs+6PJO1GmnlhOkG9JAIPkv0RBZvR0PMBtbp6nT
+Y3yo1lwamBVBfY6rc0sLTzosZh2aGoLzrHNMQFMGaauORzBFpY5lU50CgYEAzPHl
+u5DI6Xgep1vr8QvCUuEesCOgJg8Yh1UqVoY/SmQh6MYAv1I9bLGwrb3WW/7kqIoD
+fj0aQV5buVZI2loMomtU9KY5SFIsPV+JuUpy7/+VE01ZQM5FdY8wiYCQiVZYju9X
+Wz5LxMNoz+gT7pwlLCsC4N+R8aoBk404aF1gum8CgYAJ7VTq7Zj4TFV7Soa/T1eE
+k9y8a+kdoYk3BASpCHJ29M5R2KEA7YV9wrBklHTz8VzSTFTbKHEQ5W5csAhoL5Fo
+qoHzFFi3Qx7MHESQb9qHyolHEMNx6QdsHUn7rlEnaTTyrXh3ifQtD6C0yTmFXUIS
+CW9wKApOrnyKJ9nI0HcuZQKBgQCMtoV6e9VGX4AEfpuHvAAnMYQFgeBiYTkBKltQ
+XwozhH63uMMomUmtSG87Sz1TmrXadjAhy8gsG6I0pWaN7QgBuFnzQ/HOkwTm+qKw
+AsrZt4zeXNwsH7QXHEJCFnCmqw9QzEoZTrNtHJHpNboBuVnYcoueZEJrP8OnUG3r
+UjmopwKBgAqB2KYYMUqAOvYcBnEfLDmyZv9BTVNHbR2lKkMYqv5LlvDaBxVfilE0
+2riO4p6BaAdvzXjKeRrGNEKoHNBpOSfYCOM16NjL8hIZB1CaV3WbT5oY+jp7Mzd5
+7d56RZOE+ERK2uz/7JX9VSsM/LbH9pJibd4e8mikDS9ntciqOH/3
+-----END RSA PRIVATE KEY-----
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index 4c4a7f6a27e6bd..39b001c3d0fee6 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -231,6 +231,23 @@ def test_stat_heap_constraints
     assert_equal stat[:total_freed_objects], stat_heap_sum[:total_freed_objects]
   end
 
+  def test_measure_total_time
+    assert_separately([], __FILE__, __LINE__, <<~RUBY)
+      GC.measure_total_time = false
+
+      time_before = GC.stat(:time)
+
+      # Generate some garbage
+      Random.new.bytes(100 * 1024 * 1024)
+      GC.start
+
+      time_after = GC.stat(:time)
+
+      # If time measurement is disabled, the time stat should not change
+      assert_equal time_before, time_after
+    RUBY
+  end
+
   def test_latest_gc_info
     omit 'stress' if GC.stress
 
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 70daea0ef19150..c72b256bab39aa 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1458,6 +1458,16 @@ def test_compare_by_identity
     assert_predicate(h.dup, :compare_by_identity?, bug8703)
   end
 
+  def test_compare_by_identy_memory_leak
+    assert_no_memory_leak([], "", "#{<<~"begin;"}\n#{<<~'end;'}", "[Bug #20145]", rss: true)
+    begin;
+      h = { 1 => 2 }.compare_by_identity
+      1_000_000.times do
+        h.select { false }
+      end
+    end;
+  end
+
   def test_same_key
     bug9646 = '[ruby-dev:48047] [Bug #9646] Infinite loop at Hash#each'
     h = @cls[a=[], 1]
diff --git a/test/ruby/test_io_buffer.rb b/test/ruby/test_io_buffer.rb
index b4b63b1eda01df..321b6534ee2861 100644
--- a/test/ruby/test_io_buffer.rb
+++ b/test/ruby/test_io_buffer.rb
@@ -521,24 +521,20 @@ def test_shared
   def test_private
     Tempfile.create(%w"buffer .txt") do |file|
       file.write("Hello World")
-      file.close
-      assert_separately(["-W0", "-", file.path], "#{<<-"begin;"}\n#{<<-'end;'}")
-      begin;
-        file = File.open(ARGV[0], "r+")
-        buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::PRIVATE)
-        begin
-          assert buffer.private?
-          refute buffer.readonly?
-
-          buffer.set_string("J")
-
-          # It was not changed because the mapping was private:
-          file.seek(0)
-          assert_equal "Hello World", file.read
-        ensure
-          buffer&.free
-        end
-      end;
+
+      buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::PRIVATE)
+      begin
+        assert buffer.private?
+        refute buffer.readonly?
+
+        buffer.set_string("J")
+
+        # It was not changed because the mapping was private:
+        file.seek(0)
+        assert_equal "Hello World", file.read
+      ensure
+        buffer&.free
+      end
     end
   end
 end
diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index d4aae16037f4cf..91a9f0a96cec7e 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -711,6 +711,18 @@ def test_match_data_deconstruct_keys
     }
   end
 
+  def test_match_no_match_no_matchdata
+    EnvUtil.without_gc do
+      h = {}
+      ObjectSpace.count_objects(h)
+      prev_matches = h[:T_MATCH] || 0
+      md = /[A-Z]/.match('1') # no match
+      ObjectSpace.count_objects(h)
+      new_matches = h[:T_MATCH] || 0
+      assert_equal prev_matches, new_matches, "Bug [#20104]"
+    end
+  end
+
   def test_initialize
     assert_raise(ArgumentError) { Regexp.new }
     assert_equal(/foo/, assert_warning(/ignored/) {Regexp.new(/foo/, Regexp::IGNORECASE)})
@@ -1933,6 +1945,15 @@ def test_match_cache_negative_look_behind
     end;
   end
 
+  def test_match_cache_with_peek_optimization
+    assert_separately([], "#{<<-"begin;"}\n#{<<-'end;'}")
+    timeout = #{ EnvUtil.apply_timeout_scale(10).inspect }
+    begin;
+      Regexp.timeout = timeout
+      assert_nil(/a+z/ =~ "a" * 1000000 + "xz")
+    end;
+  end
+
   def test_cache_opcodes_initialize
     str = 'test1-test2-test3-test4-test_5'
     re = '^([0-9a-zA-Z\-/]*){1,256}$'
@@ -1979,6 +2000,14 @@ def test_bug_19537 # [Bug #19537]
     end
   end
 
+  def test_bug_20083 # [Bug #20083]
+    re = /([\s]*ABC)$/i
+    (1..100).each do |n|
+      text = "#{"0" * n}ABC"
+      assert text.match?(re)
+    end
+  end
+
   def test_linear_time_p
     assert_send [Regexp, :linear_time?, /a/]
     assert_send [Regexp, :linear_time?, 'a']
diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 9be0aac47972c2..309a6af40f6894 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -254,6 +254,14 @@ def under_gc_compact_stress(val = :empty, &block)
   end
   module_function :under_gc_compact_stress
 
+  def without_gc
+    prev_disabled = GC.disable
+    yield
+  ensure
+    GC.enable unless prev_disabled
+  end
+  module_function :without_gc
+
   def with_default_external(enc)
     suppress_warning { Encoding.default_external = enc }
     yield
diff --git a/version.h b/version.h
index eaba1c19856c37..c74c606aa3c88b 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL -1
+#define RUBY_PATCHLEVEL 8
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"