VM: Fix WeakProperty processing during parallel marking.

runtime/platform/assert.h

Index: runtime/platform/assert.h
diff --git a/runtime/platform/assert.h b/runtime/platform/assert.h
index a60d85d5fa4d1879ae23f03b80fd7b0badb523c2..9d6d67c0a4a402aa58bcbf761ca652931c6b4638 100644
--- a/runtime/platform/assert.h
+++ b/runtime/platform/assert.h
@@ -281,6 +281,12 @@ T DynamicAssertionHelper::NotNull(const T p) {
 #endif  // if defined(DEBUG)
 
 
+#define RELEASE_ASSERT(cond)                                                   \
+  do {                                                                         \
+    if (!(cond)) dart::Assert(__FILE__, __LINE__).Fail("expected: %s", #cond); \
+  } while (false)
+
+
 // The COMPILE_ASSERT macro can be used to verify that a compile time
 // expression is true. For example, you could use it to verify the
 // size of a static array: