templater: abort if infinite recursion detected while evaluation (issue4758)...
templater: abort if infinite recursion detected while evaluation (issue4758)
It would be nice if we could detect recursion at the parsing phase, but we
can't because a template can refer to a keyword of the same name. For example,
"rev = {rev}" is valid if rev is a keyword, and we don't know if rev is a
keyword or a template while parsing.