Issue #3329: Fix _PyObject_ArenaVirtualFree()

According to VirtualFree() documentation, the size must be zero if the "free
type" is MEM_RELEASE.

diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index d08515d776633a92e444b61975870d00362f1ce6..97a137db37300435fa376d58caef369ddcb35d0f 100644 (file)
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -68,7 +68,7 @@ _PyObject_ArenaVirtualAlloc(void *ctx, size_t size)
 static void
 _PyObject_ArenaVirtualFree(void *ctx, void *ptr, size_t size)
 {
-    VirtualFree(ptr, size, MEM_RELEASE);
+    VirtualFree(ptr, 0, MEM_RELEASE);
 }
 
 #elif defined(ARENAS_USE_MMAP)