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# Error code E0452

An invalid lint attribute has been given.

Erroneous code example:

    #![allow(unused)]
    #![allow(foo = "")] // error: malformed lint attribute
    fn main() {
    }

Lint attributes only accept a list of identifiers (where each identifier is a lint name). Ensure the attribute is of this form:

    #![allow(unused)]
    #![allow(foo)] // ok!
    fn main() {
    // or:
    #![allow(foo, foo2)] // ok!
    }