Cannot validate with OpenAPI specification schema

[navrocky]

I've tried loading two different OpenAPI json schemas and failed both times.

1. With OpenAPI schema 3.0.x (2019-04-02) i've get unexpected exception "type must be number, but is boolean" when executing set_root_schema
2. With OpenAPI schema 3.1 (2020-12) set_root_schema completed without errors, but the subsequent validation was always successful and even in the case of incorrect json.

Here is a sample project with errors: github.com/navrocky/cpp-json-schema-validation-errors

[rpatters1]

I am trying to use the MNX schema (2020-12) and it is blowing up on set_root_schema as well. But the README says it supports draft-07. Is the README out of date, or has this repo fallen behind the schema drafts? Is 2020-12 even supposed to work?