1#### Note: this error code is no longer emitted by the compiler.23This error indicates that an empty match expression is invalid because the type4it is matching on is non-empty (there exist values of this type). In safe code5it is impossible to create an instance of an empty type, so empty match6expressions are almost never desired. This error is typically fixed by adding7one or more cases to the match expression.89An example of an empty type is `enum Empty { }`. So, the following will work:1011```12enum Empty {}1314fn foo(x: Empty) {15    match x {16        // empty17    }18}19```2021However, this won't:2223```compile_fail24fn foo(x: Option<String>) {25    match x {26        // empty27    }28}29```