Don't call BUILD in new

src/core/Backtrace.pm

@@ -50,10 +50,7 @@ my class Backtrace {
     has Mu $!frames;
     has Int $!bt-next;   # next bt index to vivify
 
-    submethod BUILD(:$!bt, :$!bt-next) {
-        $!frames := nqp::list;
-        self;
-    }
+    submethod BUILD(:$!bt, :$!bt-next) { $!frames := nqp::list }
 
     multi method new(Mu $e, Int $offset = 0) {
         $e.^name eq 'BOOTException'
@@ -72,7 +69,7 @@ my class Backtrace {
         # only check for verbose stack frames once
         $RAKUDO-VERBOSE-STACKFRAME = +(%*ENV<RAKUDO_VERBOSE_STACKFRAME> // 0);
 
-        nqp::create(self).BUILD(:$bt, :$bt-next);
+        self.bless(:$bt, :$bt-next);
     }
 
     method AT-POS($pos) {

src/core/Capture.pm

@@ -3,9 +3,7 @@ my class Capture { # declared in BOOTSTRAP
     #     has Mu $!list;   # positional parameters
     #     has Mu $!hash;   # named parameters
 
-    method new(:@list,:%hash) {
-        nqp::create(self).BUILD(:@list,:%hash);
-    }
+    method new(:@list,:%hash) { self.bless(:@list,:%hash) }
 
     method from-args(|c) { c }
 
@@ -15,7 +13,6 @@ my class Capture { # declared in BOOTSTRAP
         );
         my Mu $hs := nqp::getattr(nqp::decont(%hash), EnumMap, '$!storage');
         nqp::bindattr(self, Capture, '$!hash', nqp::ishash($hs) ?? $hs !! nqp::hash());
-        self;
     }
     multi method WHICH (Capture:D:) {
         my $WHICH = self.^name;

src/core/native_array.pm

@@ -159,15 +159,8 @@ class array is Iterable is repr('VMArray') {
             has $!reified;  # Parcel of native array refs we return after reifying
             has int $!idx;  # Starting index of this iterator
 
-            method new($array) {
-                my \iter = nqp::create(self);
-                iter.BUILD(:$array);
-                iter
-            }
-
-            submethod BUILD(:$array) {
-                $!array := nqp::decont($array);
-            }
+            method new($array) { self.bless(:$array) }
+            submethod BUILD(:$array) { $!array := nqp::decont($array) }
 
             method reify($n) {   # :$sink is not needed here
                 unless nqp::isconcrete($!reified) {
@@ -365,15 +358,8 @@ class array is Iterable is repr('VMArray') {
             has $!reified;  # Parcel of native array refs we return after reifying
             has int $!idx;  # Starting index of this iterator
 
-            method new($array) {
-                my \iter = nqp::create(self);
-                iter.BUILD(:$array);
-                iter
-            }
-
-            submethod BUILD(:$array) {
-                $!array := nqp::decont($array);
-            }
+            method new($array) { self.bless(:$array) }
+            submethod BUILD(:$array) { $!array := nqp::decont($array) }
 
             method reify($n, :$sink) {
                 unless nqp::isconcrete($!reified) {