|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue40242.dart:9:5: Error: Can't assign to 'this'. | 
|  | //     this = new C(); | 
|  | //     ^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue40242.dart:15:3: Error: Can't assign to the final variable 'c1'. | 
|  | //   c1 = new C(); | 
|  | //   ^^ | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue40242.dart:16:3: Error: Can't assign to a type literal. | 
|  | //   C = Object; | 
|  | //   ^ | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue40242.dart:20:3: Error: Can't assign to the const variable 'c3'. | 
|  | //   c3 = null; | 
|  | //   ^^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | class C extends core::Object { | 
|  | synthetic constructor •() → self::C | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | extension E on self::C { | 
|  | method errors = self::E|errors; | 
|  | method tearoff errors = self::E|get#errors; | 
|  | } | 
|  | static extension-member method E|errors(lowered final self::C #this) → dynamic { | 
|  | invalid-expression "pkg/front_end/testcases/general/issue40242.dart:9:5: Error: Can't assign to 'this'. | 
|  | this = new C(); | 
|  | ^^^^"; | 
|  | } | 
|  | static extension-member method E|get#errors(lowered final self::C #this) → () → dynamic | 
|  | return () → dynamic => self::E|errors(#this); | 
|  | static method errors() → dynamic { | 
|  | final self::C c1 = new self::C::•(); | 
|  | invalid-expression "pkg/front_end/testcases/general/issue40242.dart:15:3: Error: Can't assign to the final variable 'c1'. | 
|  | c1 = new C(); | 
|  | ^^"; | 
|  | invalid-expression "pkg/front_end/testcases/general/issue40242.dart:16:3: Error: Can't assign to a type literal. | 
|  | C = Object; | 
|  | ^"; | 
|  | self::C c2; | 
|  | { | 
|  | final synthesized self::C #0#0 = new self::C::•(); | 
|  | c2 = #0#0; | 
|  | } | 
|  | invalid-expression "pkg/front_end/testcases/general/issue40242.dart:20:3: Error: Can't assign to the const variable 'c3'. | 
|  | c3 = null; | 
|  | ^^"; | 
|  | } | 
|  | static method main() → dynamic {} |