Struct update syntax was used without a base expression.
Erroneous code example:
struct Foo { fizz: u8, buzz: u8 } let f1 = Foo { fizz: 10, buzz: 1}; let f2 = Foo { fizz: 10, .. }; // error
Using struct update syntax requires a ‘base expression’. This will be used to fill remaining fields.
struct Foo { fizz: u8, buzz: u8 } let f1 = Foo { fizz: 10, buzz: 1}; let f2 = Foo { fizz: 10, ..f1 };