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// run-pass // revisions: mirunsafeck thirunsafeck // [thirunsafeck]compile-flags: -Z thir-unsafeck #![allow(unused_variables)] macro_rules! duplicate { ($i: item) => { mod m1 { $i } mod m2 { $i } } } duplicate! { pub union U { pub a: u8 } } fn main() { let u1 = m1::U { a: 0 }; let u2 = m2::U { a: 0 }; }