fixup

Author: ronag

test/common/heap.js

@@ -21,6 +21,7 @@ const { getHeapSnapshot } = require('v8');
 
 function createJSHeapSnapshot(stream = getHeapSnapshot()) {
   stream.pause();
+  stream.read(0);
   const dump = JSON.parse(stream.read(stream.readableLength));
   const meta = dump.snapshot.meta;