diff --git a/Zend/zend_portability.h b/Zend/zend_portability.h
index c561e0fdf2d..a1e6517909d 100644
--- a/Zend/zend_portability.h
+++ b/Zend/zend_portability.h
@@ -610,4 +610,12 @@ extern "C++" {
 # define ZEND_PREFER_RELOAD
 #endif
 
+#if defined(ZEND_WIN32) && defined(_DEBUG) && defined(PHP_WIN32_DEBUG_HEAP)
+# define ZEND_IGNORE_LEAKS_BEGIN() _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) & ~_CRTDBG_ALLOC_MEM_DF)
+# define ZEND_IGNORE_LEAKS_END() _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_ALLOC_MEM_DF)
+#else
+# define ZEND_IGNORE_LEAKS_BEGIN()
+# define ZEND_IGNORE_LEAKS_END()
+#endif
+
 #endif /* ZEND_PORTABILITY_H */
diff --git a/Zend/zend_strtod.c b/Zend/zend_strtod.c
index 08f8424e8c5..2228e2262cf 100644
--- a/Zend/zend_strtod.c
+++ b/Zend/zend_strtod.c
@@ -546,6 +546,7 @@ Bigint {
  static Bigint *freelist[Kmax+1];
 
 static void destroy_freelist(void);
+static void free_p5s(void);
 
 #ifdef ZTS
 static MUTEX_T dtoa_mutex;
@@ -564,6 +565,8 @@ ZEND_API int zend_startup_strtod(void) /* {{{ */
 ZEND_API int zend_shutdown_strtod(void) /* {{{ */
 {
 	destroy_freelist();
+	free_p5s();
+
 #ifdef ZTS
 	tsrm_mutex_free(dtoa_mutex);
 	dtoa_mutex = NULL;
@@ -4540,6 +4543,19 @@ static void destroy_freelist(void)
 	FREE_DTOA_LOCK(0)
 }
 
+static void free_p5s(void)
+{
+	Bigint **listp, *tmp;
+
+	ACQUIRE_DTOA_LOCK(1)
+	listp = &p5s;
+	while ((tmp = *listp) != NULL) {
+		*listp = tmp->next;
+		free(tmp);
+	}
+	FREE_DTOA_LOCK(1)
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/Zend/zend_vm_execute.h b/Zend/zend_vm_execute.h
index a30b8ed469f..32d00e7af4c 100644
--- a/Zend/zend_vm_execute.h
+++ b/Zend/zend_vm_execute.h
@@ -59414,13 +59414,17 @@ void zend_vm_init(void)
 	VM_TRACE_START();
 }
 
+static HashTable *zend_handlers_table = NULL;
+
 void zend_vm_dtor(void)
 {
 	VM_TRACE_END();
+	if (zend_handlers_table) {
+		zend_hash_destroy(zend_handlers_table);
+		free(zend_handlers_table);
+	}
 }
 
-static HashTable *zend_handlers_table = NULL;
-
 static void init_opcode_serialiser(void)
 {
 	int i;
diff --git a/Zend/zend_vm_execute.skl b/Zend/zend_vm_execute.skl
index 27aae163913..3e520e9bacd 100644
--- a/Zend/zend_vm_execute.skl
+++ b/Zend/zend_vm_execute.skl
@@ -67,13 +67,17 @@ void {%INITIALIZER_NAME%}(void)
 	VM_TRACE_START();
 }
 
+static HashTable *zend_handlers_table = NULL;
+
 void zend_vm_dtor(void)
 {
 	VM_TRACE_END();
+	if (zend_handlers_table) {
+		zend_hash_destroy(zend_handlers_table);
+		free(zend_handlers_table);
+	}
 }
 
-static HashTable *zend_handlers_table = NULL;
-
 static void init_opcode_serialiser(void)
 {
 	int i;
diff --git a/ext/libxml/config.w32 b/ext/libxml/config.w32
index b11c57bc44a..dd91c4b8935 100644
--- a/ext/libxml/config.w32
+++ b/ext/libxml/config.w32
@@ -16,6 +16,9 @@ if (PHP_LIBXML == "yes") {
 			ADD_DEF_FILE("ext\\libxml\\php_libxml2.def");
 		}
 		PHP_INSTALL_HEADERS("ext/libxml/", "php_libxml.h");
+		if (PHP_CRT_DEBUG == "yes") {
+			ADD_FLAG("CFLAGS_LIBXML", "/D PHP_WIN32_DEBUG_HEAP");
+		}
 	} else {
 		WARNING("libxml support can't be enabled, iconv or libxml are missing")
 		PHP_LIBXML = "no"
diff --git a/ext/libxml/libxml.c b/ext/libxml/libxml.c
index 01dc753c7ed..3206bbe1629 100644
--- a/ext/libxml/libxml.c
+++ b/ext/libxml/libxml.c
@@ -724,7 +724,9 @@ PHP_LIBXML_API void php_libxml_initialize(void)
 {
 	if (!_php_libxml_initialized) {
 		/* we should be the only one's to ever init!! */
+		ZEND_IGNORE_LEAKS_BEGIN();
 		xmlInitParser();
+		ZEND_IGNORE_LEAKS_END();
 
 		_php_libxml_default_entity_loader = xmlGetExternalEntityLoader();
 		xmlSetExternalEntityLoader(_php_libxml_pre_ext_ent_loader);