A type dependency cycle has been encountered.
Erroneous code example:
trait FirstTrait : SecondTrait { } trait SecondTrait : FirstTrait { }
The previous example contains a circular dependency between two traits: FirstTrait
depends on SecondTrait
which itself depends on FirstTrait
.
See https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information.