Krikri::VariableSubstitutor::TemplateRecursionError
Raised when re-templating a value's own {{ }} text exceeds
MAX_RETEMPLATING_DEPTH - the shape of a mutually-templated variable
pair (a: "{{ b }}" / b: "{{ a }}"), where resolving a re-renders
b, whose value re-resolves a, forever. Real ansible-core fails the
task with "Recursive loop detected in template"; this engine
previously blew the C stack and crashed the whole process.