src/test/ui/feature-gates/feature-gate-unrestricted-attribute-tokens.rs

#![feature(custom_attribute)]

#[my_attr(a b c d)]
//~^ ERROR expected one of `(`, `)`, `,`, `::`, or `=`, found `b`
//~| ERROR expected one of `(`, `)`, `,`, `::`, or `=`, found `c`
//~| ERROR expected one of `(`, `)`, `,`, `::`, or `=`, found `d`
fn main() {}