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// The `?` operator is still not const-evaluatable because it calls `From::from` on the error
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// variant.
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const fn opt() -> Option<i32> {
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let x = Some(2);
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x?; //~ ERROR `?` is not allowed in a `const fn`
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//~^ ERROR: cannot convert
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//~| ERROR: cannot determine
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None
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}
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fn main() {}
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