Error code E0590

break or continue keywords were used in a condition of a while loop without a label.

Erroneous code code:

#![allow(unused)] fn main() { while break {} }

break or continue must include a label when used in the condition of a while loop.

To fix this, add a label specifying which loop is being broken out of:

#![allow(unused)] fn main() { 'foo: while break 'foo {} }