| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:10:3: Error: The method 'Sub.foo' doesn't have the named parameter 'y' of overridden method 'Super.foo'. | 
 | //   foo({num x, Symbol x2, bool x3}) {} | 
 | //   ^ | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:6:3: Context: This is the overridden method ('foo'). | 
 | //   foo({num x, String y}) {} | 
 | //   ^ | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:6:12: Error: The parameter 'x' can't have a value of 'null' because of its type 'num', but the implicit default value is 'null'. | 
 | // Try adding either an explicit non-'null' default value or the 'required' modifier. | 
 | //   foo({num x, String y}) {} | 
 | //            ^ | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:6:22: Error: The parameter 'y' can't have a value of 'null' because of its type 'String', but the implicit default value is 'null'. | 
 | // Try adding either an explicit non-'null' default value or the 'required' modifier. | 
 | //   foo({num x, String y}) {} | 
 | //                      ^ | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:10:12: Error: The parameter 'x' can't have a value of 'null' because of its type 'num', but the implicit default value is 'null'. | 
 | // Try adding either an explicit non-'null' default value or the 'required' modifier. | 
 | //   foo({num x, Symbol x2, bool x3}) {} | 
 | //            ^ | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:10:22: Error: The parameter 'x2' can't have a value of 'null' because of its type 'Symbol', but the implicit default value is 'null'. | 
 | //  - 'Symbol' is from 'dart:core'. | 
 | // Try adding either an explicit non-'null' default value or the 'required' modifier. | 
 | //   foo({num x, Symbol x2, bool x3}) {} | 
 | //                      ^^ | 
 | // | 
 | // pkg/front_end/testcases/general/invalid_override_named_parameter.dart:10:31: Error: The parameter 'x3' can't have a value of 'null' because of its type 'bool', but the implicit default value is 'null'. | 
 | // Try adding either an explicit non-'null' default value or the 'required' modifier. | 
 | //   foo({num x, Symbol x2, bool x3}) {} | 
 | //                               ^^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class Super extends core::Object { | 
 |   synthetic constructor •() → self::Super | 
 |     : super core::Object::•() | 
 |     ; | 
 |   method foo({core::num x = #C1, core::String y = #C1}) → dynamic {} | 
 | } | 
 | class Sub extends self::Super { | 
 |   synthetic constructor •() → self::Sub | 
 |     : super self::Super::•() | 
 |     ; | 
 |   erroneous method foo({core::num x = #C1, core::Symbol x2 = #C1, core::bool x3 = #C1}) → dynamic {} | 
 | } | 
 |  | 
 | constants  { | 
 |   #C1 = null | 
 | } |