error[E0004]: non-exhaustive patterns: `Tag(Context::Exif, _)` not covered --> $DIR/issue-50900.rs:15:11 | LL | match Tag::ExifIFDPointer { | ^^^^^^^^^^^^^^^^^^^ pattern `Tag(Context::Exif, _)` not covered | note: `Tag` defined here --> $DIR/issue-50900.rs:2:12 | LL | pub struct Tag(pub Context, pub u16); | ^^^ = note: the matched value is of type `Tag` help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown | LL ~ Tag::ExifIFDPointer => {}, LL + Tag(Context::Exif, _) => todo!() | error: aborting due to previous error For more information about this error, try `rustc --explain E0004`.