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#![feature(marker_trait_attr)]
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#[marker(always)] //~ ERROR malformed `marker` attribute
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trait Marker1 {}
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#[marker("never")] //~ ERROR malformed `marker` attribute
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trait Marker2 {}
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#[marker(key = "value")] //~ ERROR malformed `marker` attribute
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trait Marker3 {}
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fn main() {}
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