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#[lang = "sized"] pub trait Sized {} struct Foo<T>(T); struct Bar<T> { a: Foo<T>, b: bool, // { dg-warning "field is never read" "" { target *-*-* } .-1 } } fn main() { let a: Bar<i32> = Bar::<i32> { a: Foo::<i32>(123), b: true, }; let b: i32 = a.a.0; // { dg-warning "unused name" "" { target *-*-* } .-1 } }