Coverage Weirdness in Node.js

Problem I'm Seeing

For some of the internal modules in Node.js, it seems that the coverage reported by the inspector does not include the outer most block:

This should not be possible, given that it does contain coverage for deeper blocks within the AST.

Creating This Output

I created the output shared in this repo by running:

NODE_V8_COVERAGE=./cov ./tools/test.py test/parallel/test-fs-mkdir.js