"CS8306: Tuple element name inferred" reported for deconstruction assignment with inferred name and type

[cston]

Compile with language version 7.0 with 7.1 compiler:

class C
{
    static void M(int a, int b, bool condition)
    {
        (var c, var d) = condition ? (a, default(object)) : (b, null);
    }
}

(5,26): error CS8306: Tuple element name 'a' is inferred. Please use language version 7.1 or greater to access an element by its inferred name.

[jcouv]

This was fixed in 15.3.2