| library; | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | extension type Ext(core::String _) implements core::String { | 
 |   abstract extension-type-member representation-field get _() → core::String; | 
 |   constructor _ = self::Ext|constructor#_; | 
 |   constructor tearoff _ = self::Ext|constructor#_#_#tearOff; | 
 |   constructor • = self::Ext|constructor#; | 
 |   constructor tearoff • = self::Ext|constructor#_#new#tearOff; | 
 | } | 
 | static const field core::String? maybe = #C5; | 
 | static extension-type-member method Ext|constructor#_(core::String _) → self::Ext /* erasure=core::String */ { | 
 |   lowered final self::Ext /* erasure=core::String */ #this = _; | 
 |   return #this; | 
 | } | 
 | static extension-type-member method Ext|constructor#_#_#tearOff(core::String _) → self::Ext /* erasure=core::String */ | 
 |   return self::Ext|constructor#_(_); | 
 | static extension-type-member method Ext|constructor#() → self::Ext /* erasure=core::String */ { | 
 |   lowered final self::Ext /* erasure=core::String */ #this = "OK"; | 
 |   assert(!(#C5 == null), "Must not be null"); | 
 |   return #this; | 
 | } | 
 | static extension-type-member method Ext|constructor#_#new#tearOff() → self::Ext /* erasure=core::String */ | 
 |   return self::Ext|constructor#(); | 
 | static method main() → void { | 
 |   self::Ext /* erasure=core::String */ c = #C6; | 
 |   core::print(c); | 
 | } | 
 |  | 
 | constants  { | 
 |   #C1 = "not there" | 
 |   #C2 = eval /* from org-dartlang-testcase:///issue56803.dart */ const core::bool::fromEnvironment(#C1) | 
 |   #C3 = "string" | 
 |   #C4 = null | 
 |   #C5 = eval /* from org-dartlang-testcase:///issue56803.dart */ #C2 ?{core::String?} #C3 : #C4 | 
 |   #C6 = eval /* from org-dartlang-testcase:///issue56803.dart */ const self::Ext|constructor#() | 
 | } | 
 |  | 
 | Extra constant evaluation status: | 
 | Evaluated with empty environment: Not @ org-dartlang-testcase:///issue56803.dart:8:22 -> BoolConstant(false) | 
 | Evaluated with empty environment: EqualsNull @ org-dartlang-testcase:///issue56803.dart:8:22 -> BoolConstant(true) | 
 | Evaluated with empty environment: ConstantExpression @ org-dartlang-testcase:///issue56803.dart:8:16 -> NullConstant(null) | 
 | Evaluated with empty environment: ConstantExpression @ org-dartlang-testcase:///issue56803.dart:5:57 -> NullConstant(null) | 
 | Extra constant evaluation: evaluated: 13, effectively constant: 4 |