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update stabilization to 1.49.0
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@ -506,7 +506,7 @@ impl<T: Error> Error for Box<T> {
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}
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}
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#[stable(feature = "error_by_ref", since = "1.47.0")]
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#[stable(feature = "error_by_ref", since = "1.49.0")]
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impl<'a, T: Error + ?Sized> Error for &'a T {
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#[allow(deprecated, deprecated_in_future)]
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fn description(&self) -> &str {
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