message: fix(compiler): use correct variable in invalid function
  Related to (but does not close it).
  PR Close
diff: @@ -57,7 +57,7 @@ export function unsupported(feature: string): never {
  export function invalid<T>(arg: o.Expression | o.Statement | t.Node): never {
  throw new Error(
  - `Invalid state: Visitor ${this.constructor.name} doesn't handle ${o.constructor.name}`);
  + `Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);
  }
  export function asLiteral(value: any): o.Expression {
  