Merge branch 'PHP-7.4' into PHP-8.0

* PHP-7.4:
  Fix Closure::call() on internal method closure

Author: nikic

Zend/tests/closure_call_internal.phpt

@@ -0,0 +1,10 @@
+--TEST--
+Closure::call() on internal method
+--FILE--
+<?php
+
+var_dump(Closure::fromCallable([new DateTime(), 'getTimestamp'])->call(new DateTime('@123')));
+
+?>
+--EXPECT--
+int(123)

Zend/zend_closures.c

@@ -155,6 +155,9 @@ ZEND_METHOD(Closure, call)
 		my_function.common.fn_flags &= ~ZEND_ACC_CLOSURE;
 		/* use scope of passed object */
 		my_function.common.scope = Z_OBJCE_P(newthis);
+		if (closure->func.type == ZEND_INTERNAL_FUNCTION) {
+			my_function.internal_function.handler = closure->orig_internal_handler;
+		}
 		fci_cache.function_handler = &my_function;
 
 		/* Runtime cache relies on bound scope to be immutable, hence we need a separate rt cache in case scope changed */