Index: php5-5.3.3.1/ext/phar/phar_object.c
===================================================================
--- php5-5.3.3.1.orig/ext/phar/phar_object.c	2016-02-24 14:56:56.000000000 +0100
+++ php5-5.3.3.1/ext/phar/phar_object.c	2016-02-24 15:16:11.000000000 +0100
@@ -4949,6 +4949,7 @@
 
 	phar_seek_efp(link, 0, SEEK_SET, 0, 0 TSRMLS_CC);
 	Z_TYPE_P(return_value) = IS_STRING;
+        Z_STRVAL_P(return_value) = NULL;
 #if PHP_MAJOR_VERSION >= 6
 	Z_STRLEN_P(return_value) = php_stream_copy_to_mem(fp, (void **) &(Z_STRVAL_P(return_value)), link->uncompressed_filesize, 0);
 #else