Invalid error message that variable is not bound in all match arm alternatives in case of duplicates in alternatives

[ironcev]

If one of the alternatives contains duplicate variables, an error will be reported in other alternatives that the variable is not bound although it is.

let _x = match or5 {
    Struct { x, y: x, .. } | Struct { x, .. } => x,
                             ^^^^^^^^^^^^^^^^ Variable "x" is not bound in all patterns
    ...
 };