Try a possible fix

Author: kocsismate

ext/ffi/ffi.c

@@ -3709,18 +3709,14 @@ ZEND_METHOD(FFI, new) /* {{{ */
 			is_const = 1;
 		}
 
-		if (Z_TYPE(EX(This)) != IS_OBJECT) {
-			if (FFI_G(tags)) {
-				zend_ffi_tags_cleanup(&dcl);
-			}
-			if (FFI_G(symbols)) {
-				zend_hash_destroy(FFI_G(symbols));
-				efree(FFI_G(symbols));
-				FFI_G(symbols) = NULL;
-			}
+		if (FFI_G(tags)) {
+			zend_ffi_tags_cleanup(&dcl);
+		}
+		if (FFI_G(symbols)) {
+			zend_hash_destroy(FFI_G(symbols));
+			efree(FFI_G(symbols));
+			FFI_G(symbols) = NULL;
 		}
-		FFI_G(symbols) = NULL;
-		FFI_G(tags) = NULL;
 
 		type_ptr = dcl.type;
 	} else {