|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/rasta/issue_000031.dart:8:3: Error: A prefix can't be used as an expression. | 
|  | //   math..toString(); | 
|  | //   ^^^^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | import "dart:math" as math; | 
|  |  | 
|  | static method main() → dynamic { | 
|  | let final invalid-type #t1 = invalid-expression "pkg/front_end/testcases/rasta/issue_000031.dart:8:3: Error: A prefix can't be used as an expression. | 
|  | math..toString(); | 
|  | ^^^^" in block { | 
|  | #t1.{core::Object::toString}(){() → core::String}; | 
|  | } =>#t1; | 
|  | } |