Add test for backtrace with aliased trait (#8705)

Author: mvorisek

Zend/tests/bug69180-backtrace.phpt

@@ -0,0 +1,119 @@
+--TEST--
+Bug #69180: Backtrace does not honor trait conflict resolution / method aliasing
+--FILE--
+<?php
+
+trait T {
+    public function __get($name): string {
+        var_dump(__METHOD__);
+        print_r(array_map(fn ($v) => $v['class'] . '::' . $v['function'], debug_backtrace()));
+        
+        return '=' . $name;
+    }
+}
+
+class Model {
+    use T {
+        T::__get as private __t_get;
+    }
+    
+    public function __get($name): string {
+        var_dump(__METHOD__);
+        return $this->__t_get($name);
+    }
+}
+
+class X extends Model {}
+
+class Y extends Model {
+    public function __get($name): string {
+        var_dump(__METHOD__);
+        return parent::__get($name);
+    }
+}
+
+class Z extends Model {
+    private function __x_get($name): string {
+        var_dump(__METHOD__);
+        return parent::__get($name);
+    }
+    
+    public function __get($name): string {
+        var_dump(__METHOD__);
+        return $this->__x_get($name);
+    }
+}
+
+class P extends Model {
+    private function __t_get($name): string {
+        var_dump(__METHOD__);
+        return parent::__get($name);
+    }
+    
+    public function __get($name): string {
+        var_dump(__METHOD__);
+        return $this->__t_get($name);
+    }
+}
+
+$m = new X();
+$m->a;
+
+echo "\n";
+
+$m = new Y();
+$m->a;
+
+echo "\n";
+
+$m = new Z();
+$m->a;
+
+echo "\n";
+
+$m = new P();
+$m->a;
+
+?>
+--EXPECT--
+string(12) "Model::__get"
+string(8) "T::__get"
+Array
+(
+    [0] => Model::__t_get
+    [1] => Model::__get
+)
+
+string(8) "Y::__get"
+string(12) "Model::__get"
+string(8) "T::__get"
+Array
+(
+    [0] => Model::__t_get
+    [1] => Model::__get
+    [2] => Y::__get
+)
+
+string(8) "Z::__get"
+string(10) "Z::__x_get"
+string(12) "Model::__get"
+string(8) "T::__get"
+Array
+(
+    [0] => Model::__t_get
+    [1] => Model::__get
+    [2] => Z::__x_get
+    [3] => Z::__get
+)
+
+string(8) "P::__get"
+string(10) "P::__t_get"
+string(12) "Model::__get"
+string(8) "T::__get"
+Array
+(
+    [0] => Model::__t_get
+    [1] => Model::__get
+    [2] => P::__t_get
+    [3] => P::__get
+)