Fix GH-19784: SoapServer memory leak

Closes GH-19818.

Author: nielsdos

NEWS

@@ -13,6 +13,9 @@ PHP                                                                        NEWS
   . Fix cloning of CURLOPT_POSTFIELDS when using the clone operator instead
     of the curl_copy_handle() function to clone a CurlHandle. (timwolla)
 
+- Soap:
+  . Fixed bug GH-19784 (SoapServer memory leak). (nielsdos)
+
 - Standard:
   . Fixed bug GH-12265 (Cloning an object breaks serialization recursion).
     (nielsdos)

ext/soap/soap.c

@@ -880,7 +880,13 @@ PHP_METHOD(SoapServer, __construct)
 	service->soap_functions.ft = zend_new_array(0);
 
 	if (wsdl) {
-		service->sdl = get_sdl(ZEND_THIS, ZSTR_VAL(wsdl), cache_wsdl);
+		zend_try {
+			service->sdl = get_sdl(ZEND_THIS, ZSTR_VAL(wsdl), cache_wsdl);
+		} zend_catch {
+			xmlCharEncCloseFunc(service->encoding);
+			service->encoding = NULL;
+			zend_bailout();
+		} zend_end_try();
 		if (service->uri == NULL) {
 			if (service->sdl->target_ns) {
 				service->uri = estrdup(service->sdl->target_ns);

ext/soap/tests/bugs/gh19784.phpt

@@ -0,0 +1,14 @@
+--TEST--
+GH-19784 (SoapServer memory leak)
+--EXTENSIONS--
+soap
+--FILE--
+<?php
+$v_5256 = 'zpHOks6TzpTOlc6WzpfOmM6ZzprOm86czp3Ons6fzqDOoc6jzqTOpc6mzqfOqM6p';
+$v_5257 = base64_decode($v_5256,);
+$v_5238 = array('encoding' => $v_5257);
+new SoapServer('foobarbaz',$v_5238,);
+?>
+--EXPECTF--
+<?xml version="1.0" encoding="UTF-8"?>
+<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>%s</faultcode><faultstring>%a