update composer libs

vendor/sabre/xml/CHANGELOG.md

@@ -1,6 +1,12 @@
 ChangeLog
 =========
 
+1.5.1 (2019-01-09)
+------------------
+
+* #161: Prevent infinite loop on empty xml elements
+
+
 1.5.0 (2016-10-09)
 ------------------
 

vendor/sabre/xml/composer.json

@@ -45,7 +45,7 @@
     },
     "require-dev": {
         "sabre/cs": "~1.0.0",
-        "phpunit/phpunit" : "*"
+        "phpunit/phpunit" : "~4.8|~5.7"
     },
     "config" : {
         "bin-dir" : "bin/"

vendor/sabre/xml/lib/Deserializer/functions.php

@@ -66,9 +66,20 @@ function keyValue(Reader $reader, $namespace = null) {
         return [];
     }
 
+    if (!$reader->read()) {
+        $reader->next();
+
+        return [];
+    }
+
+    if (Reader::END_ELEMENT === $reader->nodeType) {
+        $reader->next();
+
+        return [];
+    }
+
     $values = [];
 
-    $reader->read();
     do {
 
         if ($reader->nodeType === Reader::ELEMENT) {
@@ -79,7 +90,9 @@ function keyValue(Reader $reader, $namespace = null) {
                 $values[$clark] = $reader->parseCurrentElement()['value'];
             }
         } else {
-            $reader->read();
+            if (!$reader->read()) {
+                break;
+            }
         }
     } while ($reader->nodeType !== Reader::END_ELEMENT);
 
@@ -144,7 +157,17 @@ function enum(Reader $reader, $namespace = null) {
         $reader->next();
         return [];
     }
-    $reader->read();
+    if (!$reader->read()) {
+        $reader->next();
+
+        return [];
+    }
+
+    if (Reader::END_ELEMENT === $reader->nodeType) {
+        $reader->next();
+
+        return [];
+    }
     $currentDepth = $reader->depth;
 
     $values = [];
@@ -204,7 +227,9 @@ function valueObject(Reader $reader, $className, $namespace) {
                 $reader->next();
             }
         } else {
-            $reader->read();
+            if (!$reader->read()) {
+                break;
+            }
         }
     } while ($reader->nodeType !== Reader::END_ELEMENT);
 

vendor/sabre/xml/lib/Service.php

@@ -138,7 +138,8 @@ class Service {
      * @param string|string[] $rootElementName
      * @param string|resource $input
      * @param string|null $contextUri
-     * @return void
+     * @throws ParseException
+     * @return array|object|string
      */
     function expect($rootElementName, $input, $contextUri = null) {