|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:5:1: Error: A function declaration needs an explicit list of parameters. | 
|  | // Try adding a parameter list to the function declaration. | 
|  | // x.y = 42; | 
|  | // ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:5:2: Error: Expected '{' before this. | 
|  | // x.y = 42; | 
|  | //  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:5:2: Error: Expected a declaration, but got '.'. | 
|  | // x.y = 42; | 
|  | //  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:5:3: Error: Variables must be declared using the keywords 'const', 'final', 'var' or a type name. | 
|  | // Try adding the name of the type of the variable or the keyword 'var'. | 
|  | // x.y = 42; | 
|  | //   ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:6:1: Error: A function declaration needs an explicit list of parameters. | 
|  | // Try adding a parameter list to the function declaration. | 
|  | // x.z = true; | 
|  | // ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:6:2: Error: Expected '{' before this. | 
|  | // x.z = true; | 
|  | //  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:6:2: Error: Expected a declaration, but got '.'. | 
|  | // x.z = true; | 
|  | //  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:6:3: Error: Variables must be declared using the keywords 'const', 'final', 'var' or a type name. | 
|  | // Try adding the name of the type of the variable or the keyword 'var'. | 
|  | // x.z = true; | 
|  | //   ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:6:1: Error: 'x' is already declared in this scope. | 
|  | // x.z = true; | 
|  | // ^ | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:5:1: Context: Previous declaration of 'x'. | 
|  | // x.y = 42; | 
|  | // ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:8:7: Error: Can't use 'x' because it is declared more than once. | 
|  | //   if (x != null) {} | 
|  | //       ^ | 
|  | // | 
|  | // pkg/front_end/testcases/regress/ambiguous_builder_01.dart:9:15: Error: Can't use 'x' because it is declared more than once. | 
|  | //   if (null != x) {} | 
|  | //               ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | static field core::int y = 42; | 
|  | static field core::bool z = true; | 
|  | static method x() → dynamic {} | 
|  | static method foo() → void { | 
|  | if(!(invalid-expression "pkg/front_end/testcases/regress/ambiguous_builder_01.dart:8:7: Error: Can't use 'x' because it is declared more than once. | 
|  | if (x != null) {} | 
|  | ^" == null)) { | 
|  | } | 
|  | if(!(invalid-expression "pkg/front_end/testcases/regress/ambiguous_builder_01.dart:9:15: Error: Can't use 'x' because it is declared more than once. | 
|  | if (null != x) {} | 
|  | ^" == null)) { | 
|  | } | 
|  | } | 
|  | static method main() → dynamic {} |