|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:22:7: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   int instanceField = 1; | 
|  | //       ^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:23:7: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   int instanceField = 2; | 
|  | //       ^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:25:7: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   int instanceFieldAndSetter1 = 1; | 
|  | //       ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:33:7: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   int instanceFieldAndSetter2 = 1; | 
|  | //       ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:35:18: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   late final int instanceLateFinalFieldAndSetter1; | 
|  | //                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:43:18: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   late final int instanceLateFinalFieldAndSetter2; | 
|  | //                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:45:13: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   final int instanceDuplicateFieldAndSetter = 1; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:46:13: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   final int instanceDuplicateFieldAndSetter = 2; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:51:13: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   final int instanceFieldAndDuplicateSetter = 1; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:60:13: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   final int instanceDuplicateFieldAndDuplicateSetter = 1; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:61:13: Error: Extensions can't declare instance fields | 
|  | // Try removing the field declaration or making it a static field | 
|  | //   final int instanceDuplicateFieldAndDuplicateSetter = 2; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:9:7: Error: 'instanceMethod' is already declared in this scope. | 
|  | //   int instanceMethod() => 2; | 
|  | //       ^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:8:7: Context: Previous declaration of 'instanceMethod'. | 
|  | //   int instanceMethod() => 1; | 
|  | //       ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:12:11: Error: 'instanceGetter' is already declared in this scope. | 
|  | //   int get instanceGetter => 2; | 
|  | //           ^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:11:11: Context: Previous declaration of 'instanceGetter'. | 
|  | //   int get instanceGetter => 1; | 
|  | //           ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:18:12: Error: 'instanceSetter' is already declared in this scope. | 
|  | //   void set instanceSetter(value) { | 
|  | //            ^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:14:12: Context: Previous declaration of 'instanceSetter'. | 
|  | //   void set instanceSetter(value) { | 
|  | //            ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:23:7: Error: 'instanceField' is already declared in this scope. | 
|  | //   int instanceField = 2; | 
|  | //       ^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:22:7: Context: Previous declaration of 'instanceField'. | 
|  | //   int instanceField = 1; | 
|  | //       ^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:46:13: Error: 'instanceDuplicateFieldAndSetter' is already declared in this scope. | 
|  | //   final int instanceDuplicateFieldAndSetter = 2; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:45:13: Context: Previous declaration of 'instanceDuplicateFieldAndSetter'. | 
|  | //   final int instanceDuplicateFieldAndSetter = 1; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:56:12: Error: 'instanceFieldAndDuplicateSetter' is already declared in this scope. | 
|  | //   void set instanceFieldAndDuplicateSetter(int value) { | 
|  | //            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:52:12: Context: Previous declaration of 'instanceFieldAndDuplicateSetter'. | 
|  | //   void set instanceFieldAndDuplicateSetter(int value) { | 
|  | //            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:61:13: Error: 'instanceDuplicateFieldAndDuplicateSetter' is already declared in this scope. | 
|  | //   final int instanceDuplicateFieldAndDuplicateSetter = 2; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:60:13: Context: Previous declaration of 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | //   final int instanceDuplicateFieldAndDuplicateSetter = 1; | 
|  | //             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:66:12: Error: 'instanceDuplicateFieldAndDuplicateSetter' is already declared in this scope. | 
|  | //   void set instanceDuplicateFieldAndDuplicateSetter(int value) { | 
|  | //            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:62:12: Context: Previous declaration of 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | //   void set instanceDuplicateFieldAndDuplicateSetter(int value) { | 
|  | //            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:26:12: Error: Conflicts with the implicit setter of the field 'instanceFieldAndSetter1'. | 
|  | //   void set instanceFieldAndSetter1(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:25:7: Error: Conflicts with setter 'instanceFieldAndSetter1'. | 
|  | //   int instanceFieldAndSetter1 = 1; | 
|  | //       ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:30:12: Error: Conflicts with the implicit setter of the field 'instanceFieldAndSetter2'. | 
|  | //   void set instanceFieldAndSetter2(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:33:7: Error: Conflicts with setter 'instanceFieldAndSetter2'. | 
|  | //   int instanceFieldAndSetter2 = 1; | 
|  | //       ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:36:12: Error: Conflicts with the implicit setter of the field 'instanceLateFinalFieldAndSetter1'. | 
|  | //   void set instanceLateFinalFieldAndSetter1(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:35:18: Error: Conflicts with setter 'instanceLateFinalFieldAndSetter1'. | 
|  | //   late final int instanceLateFinalFieldAndSetter1; | 
|  | //                  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:40:12: Error: Conflicts with the implicit setter of the field 'instanceLateFinalFieldAndSetter2'. | 
|  | //   void set instanceLateFinalFieldAndSetter2(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:43:18: Error: Conflicts with setter 'instanceLateFinalFieldAndSetter2'. | 
|  | //   late final int instanceLateFinalFieldAndSetter2; | 
|  | //                  ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:71:12: Error: Conflicts with member 'instanceMethodAndSetter1'. | 
|  | //   void set instanceMethodAndSetter1(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:70:7: Error: Conflicts with setter 'instanceMethodAndSetter1'. | 
|  | //   int instanceMethodAndSetter1() => 1; | 
|  | //       ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:75:12: Error: Conflicts with member 'instanceMethodAndSetter2'. | 
|  | //   void set instanceMethodAndSetter2(int value) { | 
|  | //            ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:78:7: Error: Conflicts with setter 'instanceMethodAndSetter2'. | 
|  | //   int instanceMethodAndSetter2() => 1; | 
|  | //       ^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:83:5: Error: The method 'instanceMethod' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing method, or defining a method named 'instanceMethod'. | 
|  | //   c.instanceMethod(); | 
|  | //     ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:84:6: Error: The getter 'instanceMethod' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceMethod'. | 
|  | //   (c.instanceMethod)(); | 
|  | //      ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:85:5: Error: The getter 'instanceGetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceGetter'. | 
|  | //   c.instanceGetter; | 
|  | //     ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:86:5: Error: The setter 'instanceSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceSetter'. | 
|  | //   c.instanceSetter = 0; | 
|  | //     ^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:87:5: Error: The getter 'instanceField' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceField'. | 
|  | //   c.instanceField; | 
|  | //     ^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:88:5: Error: The setter 'instanceField' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceField'. | 
|  | //   c.instanceField = 0; | 
|  | //     ^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:89:5: Error: The getter 'instanceFieldAndSetter1' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndSetter1'. | 
|  | //   c.instanceFieldAndSetter1; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:90:5: Error: The setter 'instanceFieldAndSetter1' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndSetter1'. | 
|  | //   c.instanceFieldAndSetter1 = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:91:5: Error: The getter 'instanceFieldAndSetter2' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndSetter2'. | 
|  | //   c.instanceFieldAndSetter2; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:92:5: Error: The setter 'instanceFieldAndSetter2' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndSetter2'. | 
|  | //   c.instanceFieldAndSetter2 = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:93:5: Error: The getter 'instanceLateFinalFieldAndSetter1' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceLateFinalFieldAndSetter1'. | 
|  | //   c.instanceLateFinalFieldAndSetter1; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:94:5: Error: The setter 'instanceLateFinalFieldAndSetter1' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceLateFinalFieldAndSetter1'. | 
|  | //   c.instanceLateFinalFieldAndSetter1 = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:95:5: Error: The getter 'instanceLateFinalFieldAndSetter2' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceLateFinalFieldAndSetter2'. | 
|  | //   c.instanceLateFinalFieldAndSetter2; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:96:5: Error: The setter 'instanceLateFinalFieldAndSetter2' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceLateFinalFieldAndSetter2'. | 
|  | //   c.instanceLateFinalFieldAndSetter2 = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:97:5: Error: The getter 'instanceDuplicateFieldAndSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceDuplicateFieldAndSetter'. | 
|  | //   c.instanceDuplicateFieldAndSetter; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:98:5: Error: The getter 'instanceFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndDuplicateSetter'. | 
|  | //   c.instanceFieldAndDuplicateSetter; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:99:5: Error: The setter 'instanceFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndDuplicateSetter'. | 
|  | //   c.instanceFieldAndDuplicateSetter = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:100:5: Error: The getter 'instanceDuplicateFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | //   c.instanceDuplicateFieldAndDuplicateSetter; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | // pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:101:5: Error: The setter 'instanceDuplicateFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | // Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | //   c.instanceDuplicateFieldAndDuplicateSetter = 0; | 
|  | //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | extension Extension on core::int { | 
|  | method instanceMethod = self::Extension|instanceMethod; | 
|  | method tearoff instanceMethod = self::Extension|get#instanceMethod; | 
|  | get instanceGetter = self::Extension|get#instanceGetter; | 
|  | field instanceField = self::Extension|instanceField; | 
|  | field instanceFieldAndSetter1 = self::Extension|instanceFieldAndSetter1; | 
|  | field instanceFieldAndSetter2 = self::Extension|instanceFieldAndSetter2; | 
|  | field instanceLateFinalFieldAndSetter1 = self::Extension|instanceLateFinalFieldAndSetter1; | 
|  | field instanceLateFinalFieldAndSetter2 = self::Extension|instanceLateFinalFieldAndSetter2; | 
|  | field instanceDuplicateFieldAndSetter = self::Extension|instanceDuplicateFieldAndSetter; | 
|  | field instanceFieldAndDuplicateSetter = self::Extension|instanceFieldAndDuplicateSetter; | 
|  | field instanceDuplicateFieldAndDuplicateSetter = self::Extension|instanceDuplicateFieldAndDuplicateSetter; | 
|  | method instanceMethodAndSetter1 = self::Extension|instanceMethodAndSetter1; | 
|  | method tearoff instanceMethodAndSetter1 = self::Extension|get#instanceMethodAndSetter1; | 
|  | method instanceMethodAndSetter2 = self::Extension|instanceMethodAndSetter2; | 
|  | method tearoff instanceMethodAndSetter2 = self::Extension|get#instanceMethodAndSetter2; | 
|  | set instanceSetter = self::Extension|set#instanceSetter; | 
|  | set instanceDuplicateFieldAndSetter = self::Extension|set#instanceDuplicateFieldAndSetter; | 
|  | set instanceFieldAndDuplicateSetter = self::Extension|set#instanceFieldAndDuplicateSetter; | 
|  | set instanceDuplicateFieldAndDuplicateSetter = self::Extension|set#instanceDuplicateFieldAndDuplicateSetter; | 
|  | set instanceMethodAndSetter1 = self::Extension|set#instanceMethodAndSetter1; | 
|  | set instanceMethodAndSetter2 = self::Extension|set#instanceMethodAndSetter2; | 
|  | } | 
|  | static field dynamic result; | 
|  | static field core::int Extension|instanceField = 1; | 
|  | static field core::int Extension|instanceFieldAndSetter1 = 1; | 
|  | static field core::int Extension|instanceFieldAndSetter2 = 1; | 
|  | late static final [setter] field core::int Extension|instanceLateFinalFieldAndSetter1; | 
|  | late static final [setter] field core::int Extension|instanceLateFinalFieldAndSetter2; | 
|  | static final field core::int Extension|instanceDuplicateFieldAndSetter = 1; | 
|  | static final field core::int Extension|instanceFieldAndDuplicateSetter = 1; | 
|  | static final field core::int Extension|instanceDuplicateFieldAndDuplicateSetter = 1; | 
|  | static extension-member method Extension|instanceMethod(lowered final core::int #this) → core::int | 
|  | return 1; | 
|  | static extension-member method Extension|get#instanceMethod(lowered final core::int #this) → () → core::int | 
|  | return () → core::int => self::Extension|instanceMethod(#this); | 
|  | static extension-member method Extension|get#instanceGetter(lowered final core::int #this) → core::int | 
|  | return 1; | 
|  | static extension-member method Extension|set#instanceSetter(lowered final core::int #this, dynamic value) → void { | 
|  | self::result = 1; | 
|  | } | 
|  | static extension-member method Extension|set#instanceDuplicateFieldAndSetter(lowered final core::int #this, core::int value) → void { | 
|  | self::result = 3; | 
|  | } | 
|  | static extension-member method Extension|set#instanceFieldAndDuplicateSetter(lowered final core::int #this, core::int value) → void { | 
|  | self::result = 2; | 
|  | } | 
|  | static extension-member method Extension|set#instanceDuplicateFieldAndDuplicateSetter(lowered final core::int #this, core::int value) → void { | 
|  | self::result = 3; | 
|  | } | 
|  | static extension-member method Extension|instanceMethodAndSetter1(lowered final core::int #this) → core::int | 
|  | return 1; | 
|  | static extension-member method Extension|get#instanceMethodAndSetter1(lowered final core::int #this) → () → core::int | 
|  | return () → core::int => self::Extension|instanceMethodAndSetter1(#this); | 
|  | static extension-member method Extension|set#instanceMethodAndSetter1(lowered final core::int #this, core::int value) → void { | 
|  | self::result = 2; | 
|  | } | 
|  | static extension-member method Extension|set#instanceMethodAndSetter2(lowered final core::int #this, core::int value) → void { | 
|  | self::result = 2; | 
|  | } | 
|  | static extension-member method Extension|instanceMethodAndSetter2(lowered final core::int #this) → core::int | 
|  | return 1; | 
|  | static extension-member method Extension|get#instanceMethodAndSetter2(lowered final core::int #this) → () → core::int | 
|  | return () → core::int => self::Extension|instanceMethodAndSetter2(#this); | 
|  | static method test() → dynamic { | 
|  | core::int c = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:83:5: Error: The method 'instanceMethod' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing method, or defining a method named 'instanceMethod'. | 
|  | c.instanceMethod(); | 
|  | ^^^^^^^^^^^^^^" in c{<unresolved>}.instanceMethod(); | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:84:6: Error: The getter 'instanceMethod' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceMethod'. | 
|  | (c.instanceMethod)(); | 
|  | ^^^^^^^^^^^^^^" in c{<unresolved>}.instanceMethod{dynamic}(); | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:85:5: Error: The getter 'instanceGetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceGetter'. | 
|  | c.instanceGetter; | 
|  | ^^^^^^^^^^^^^^" in c{<unresolved>}.instanceGetter; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:86:5: Error: The setter 'instanceSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceSetter'. | 
|  | c.instanceSetter = 0; | 
|  | ^^^^^^^^^^^^^^" in c.{<unresolved>}instanceSetter = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:87:5: Error: The getter 'instanceField' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceField'. | 
|  | c.instanceField; | 
|  | ^^^^^^^^^^^^^" in c{<unresolved>}.instanceField; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:88:5: Error: The setter 'instanceField' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceField'. | 
|  | c.instanceField = 0; | 
|  | ^^^^^^^^^^^^^" in c.{<unresolved>}instanceField = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:89:5: Error: The getter 'instanceFieldAndSetter1' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndSetter1'. | 
|  | c.instanceFieldAndSetter1; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceFieldAndSetter1; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:90:5: Error: The setter 'instanceFieldAndSetter1' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndSetter1'. | 
|  | c.instanceFieldAndSetter1 = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceFieldAndSetter1 = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:91:5: Error: The getter 'instanceFieldAndSetter2' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndSetter2'. | 
|  | c.instanceFieldAndSetter2; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceFieldAndSetter2; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:92:5: Error: The setter 'instanceFieldAndSetter2' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndSetter2'. | 
|  | c.instanceFieldAndSetter2 = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceFieldAndSetter2 = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:93:5: Error: The getter 'instanceLateFinalFieldAndSetter1' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceLateFinalFieldAndSetter1'. | 
|  | c.instanceLateFinalFieldAndSetter1; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceLateFinalFieldAndSetter1; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:94:5: Error: The setter 'instanceLateFinalFieldAndSetter1' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceLateFinalFieldAndSetter1'. | 
|  | c.instanceLateFinalFieldAndSetter1 = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceLateFinalFieldAndSetter1 = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:95:5: Error: The getter 'instanceLateFinalFieldAndSetter2' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceLateFinalFieldAndSetter2'. | 
|  | c.instanceLateFinalFieldAndSetter2; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceLateFinalFieldAndSetter2; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:96:5: Error: The setter 'instanceLateFinalFieldAndSetter2' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceLateFinalFieldAndSetter2'. | 
|  | c.instanceLateFinalFieldAndSetter2 = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceLateFinalFieldAndSetter2 = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:97:5: Error: The getter 'instanceDuplicateFieldAndSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceDuplicateFieldAndSetter'. | 
|  | c.instanceDuplicateFieldAndSetter; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceDuplicateFieldAndSetter; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:98:5: Error: The getter 'instanceFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceFieldAndDuplicateSetter'. | 
|  | c.instanceFieldAndDuplicateSetter; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceFieldAndDuplicateSetter; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:99:5: Error: The setter 'instanceFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceFieldAndDuplicateSetter'. | 
|  | c.instanceFieldAndDuplicateSetter = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceFieldAndDuplicateSetter = 0; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:100:5: Error: The getter 'instanceDuplicateFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing getter, or defining a getter or field named 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | c.instanceDuplicateFieldAndDuplicateSetter; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c{<unresolved>}.instanceDuplicateFieldAndDuplicateSetter; | 
|  | invalid-expression "pkg/front_end/testcases/nnbd/duplicates_instance_extension.dart:101:5: Error: The setter 'instanceDuplicateFieldAndDuplicateSetter' isn't defined for the class 'int'. | 
|  | Try correcting the name to the name of an existing setter, or defining a setter or field named 'instanceDuplicateFieldAndDuplicateSetter'. | 
|  | c.instanceDuplicateFieldAndDuplicateSetter = 0; | 
|  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" in c.{<unresolved>}instanceDuplicateFieldAndDuplicateSetter = 0; | 
|  | } | 
|  | static method main() → dynamic { | 
|  | core::int c = 0; | 
|  | self::result = null; | 
|  | self::Extension|set#instanceDuplicateFieldAndSetter(c, 0); | 
|  | self::expect(3, self::result); | 
|  | self::result = null; | 
|  | self::expect(1, self::Extension|instanceMethodAndSetter1(c)); | 
|  | self::Extension|set#instanceMethodAndSetter1(c, 0); | 
|  | self::expect(2, self::result); | 
|  | self::result = null; | 
|  | self::expect(1, self::Extension|instanceMethodAndSetter2(c)); | 
|  | self::Extension|set#instanceMethodAndSetter2(c, 0); | 
|  | self::expect(2, self::result); | 
|  | } | 
|  | static method expect(dynamic expected, dynamic actual) → dynamic { | 
|  | if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) | 
|  | throw "Expected ${expected}, actual ${actual}"; | 
|  | } | 
|  | static method throws(() → dynamic f) → dynamic { | 
|  | try { | 
|  | f(){() → dynamic}; | 
|  | } | 
|  | on core::Object catch(final core::Object e) { | 
|  | core::print(e); | 
|  | return; | 
|  | } | 
|  | throw "Expected exception."; | 
|  | } |