Require a key in mapping to be a scalar

[Andrey Somov]

To avoid endless false positives with parsing untrusted data we may prohibit the key in mapping to be a complex structure (sequence or mapping). Only scalars will be accepted (str, number, boolean etc)

‌

[Matt D.]

Will this create a problem with mapping JavaBeans which contain other complex beans?

‌

[Andrey Somov]

it will. The configuration will serve a single purpose - to stop low quality tooling to report vulnerabilities.
When parsing from untrusted source, it will reject a document quickly when it contains complex data structures.
When the YAML document is trusted, this setting is useless and should not be used