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warning: unused generator that must be used
--> $DIR/yield-subtype.rs:11:5
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LL | / || {
LL | | yield a;
LL | | yield b;
LL | | };
| |______^
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= note: generators are lazy and do nothing unless resumed
= note: `#[warn(unused_must_use)]` on by default
warning: 1 warning emitted
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