Fix for missing interface targets when not in strong mode.

pkg/front_end/testcases/super_rasta_copy.dart.direct.expect

 library;
 import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
   field dynamic a = null;
   field dynamic b = null;
   field dynamic c = null;
   field dynamic d = null;
   final field dynamic f = null;
@@ skipping 75 matching lines @@
     let final dynamic #t9 = super.e.+(1) in let final dynamic #t10 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t9].toList(growable: false), true)) in #t9;
     self::use(let final dynamic #t11 = super.e in let final dynamic #t12 = let final dynamic #t13 = #t11.+(1) in let final dynamic #t14 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t13].toList(growable: false), true)) in #t13 in #t11);
     let final dynamic #t15 = super.f.+(1) in let final dynamic #t16 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t15].toList(growable: false), true)) in #t15;
     self::use(let final dynamic #t17 = super.f in let final dynamic #t18 = let final dynamic #t19 = #t17.+(1) in let final dynamic #t20 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t19].toList(growable: false), true)) in #t19 in #t17);
     super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).+(1);
     self::use(let final dynamic #t21 = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)) in let final dynamic #t22 = super.g = #t21.+(1) in #t21);
     super.h = super.h.+(1);
     self::use(let final dynamic #t23 = super.h in let final dynamic #t24 = super.h = #t23.+(1) in #t23);
     super.i = super.i.+(1);
     self::use(let final dynamic #t25 = super.i in let final dynamic #t26 = super.i = #t25.+(1) in #t25);
-    let final dynamic #t27 = 87 in super.[]=(#t27, super.[](#t27).+(1));
-    self::use(let final dynamic #t28 = 87 in let final dynamic #t29 = super.[](#t28) in let final dynamic #t30 = super.[]=(#t28, #t29.+(1)) in #t29);
+    let final dynamic #t27 = 87 in super.{self::A::[]=}(#t27, super.{self::A::[]}(#t27).+(1));
+    self::use(let final dynamic #t28 = 87 in let final dynamic #t29 = super.{self::A::[]}(#t28) in let final dynamic #t30 = super.{self::A::[]=}(#t28, #t29.+(1)) in #t29);
     let final dynamic #t31 = super.m.+(1) in let final dynamic #t32 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t31].toList(growable: false), true)) in #t31;
     self::use(let final dynamic #t33 = super.m in let final dynamic #t34 = let final dynamic #t35 = #t33.+(1) in let final dynamic #t36 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t35].toList(growable: false), true)) in #t35 in #t33);
     super.a = super.a.+(1);
     self::use(super.a = super.a.+(1));
     super.b = super.b.+(1);
     self::use(super.b = super.b.+(1));
     super.c = super.c.+(1);
     self::use(super.c = super.c.+(1));
     super.d = super.d.+(1);
     self::use(super.d = super.d.+(1));
     let final dynamic #t37 = super.e.+(1) in let final dynamic #t38 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t37].toList(growable: false), true)) in #t37;
     self::use(let final dynamic #t39 = super.e.+(1) in let final dynamic #t40 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t39].toList(growable: false), true)) in #t39);
     let final dynamic #t41 = super.f.+(1) in let final dynamic #t42 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t41].toList(growable: false), true)) in #t41;
     self::use(let final dynamic #t43 = super.f.+(1) in let final dynamic #t44 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t43].toList(growable: false), true)) in #t43);
     super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).+(1);
     self::use(super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).+(1));
     super.h = super.h.+(1);
     self::use(super.h = super.h.+(1));
     super.i = super.i.+(1);
     self::use(super.i = super.i.+(1));
-    let final dynamic #t45 = 87 in let final dynamic #t46 = super.[](#t45).+(1) in let final dynamic #t47 = super.[]=(#t45, #t46) in #t46;
-    self::use(let final dynamic #t48 = 87 in let final dynamic #t49 = super.[](#t48).+(1) in let final dynamic #t50 = super.[]=(#t48, #t49) in #t49);
+    let final dynamic #t45 = 87 in let final dynamic #t46 = super.{self::A::[]}(#t45).+(1) in let final dynamic #t47 = super.{self::A::[]=}(#t45, #t46) in #t46;
+    self::use(let final dynamic #t48 = 87 in let final dynamic #t49 = super.{self::A::[]}(#t48).+(1) in let final dynamic #t50 = super.{self::A::[]=}(#t48, #t49) in #t49);
     let final dynamic #t51 = super.m.+(1) in let final dynamic #t52 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t51].toList(growable: false), true)) in #t51;
     self::use(let final dynamic #t53 = super.m.+(1) in let final dynamic #t54 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t53].toList(growable: false), true)) in #t53);
     super.{self::A::a}.call();
     self::use(super.{self::A::a}.call());
     super.{self::B::b}.call();
     self::use(super.{self::B::b}.call());
     super.{self::A::c}.call();
     self::use(super.{self::A::c}.call());
     super.{self::B::d}.call();
     self::use(super.{self::B::d}.call());
@@ skipping 24 matching lines @@
     let final dynamic #t55 = 42 in let final dynamic #t56 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t55].toList(growable: false), true)) in #t55;
     self::use(let final dynamic #t57 = 42 in let final dynamic #t58 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t57].toList(growable: false), true)) in #t57);
     let final dynamic #t59 = 42 in let final dynamic #t60 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t59].toList(growable: false), true)) in #t59;
     self::use(let final dynamic #t61 = 42 in let final dynamic #t62 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t61].toList(growable: false), true)) in #t61);
     super.g = 42;
     self::use(super.g = 42);
     super.h = 42;
     self::use(super.h = 42);
     super.i = 42;
     self::use(super.i = 42);
-    super.[]=(87, 42);
-    self::use(let final dynamic #t63 = 87 in let final dynamic #t64 = 42 in let final dynamic #t65 = super.[]=(#t63, #t64) in #t64);
+    super.{self::A::[]=}(87, 42);
+    self::use(let final dynamic #t63 = 87 in let final dynamic #t64 = 42 in let final dynamic #t65 = super.{self::A::[]=}(#t63, #t64) in #t64);
     let final dynamic #t66 = 42 in let final dynamic #t67 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t66].toList(growable: false), true)) in #t66;
     self::use(let final dynamic #t68 = 42 in let final dynamic #t69 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t68].toList(growable: false), true)) in #t68);
     super.a.==(null) ? super.a = 42 : null;
     self::use(let final dynamic #t70 = super.a in #t70.==(null) ? super.a = 42 : #t70);
     super.b.==(null) ? super.b = 42 : null;
     self::use(let final dynamic #t71 = super.b in #t71.==(null) ? super.b = 42 : #t71);
     super.c.==(null) ? super.c = 42 : null;
     self::use(let final dynamic #t72 = super.c in #t72.==(null) ? super.c = 42 : #t72);
     super.d.==(null) ? super.d = 42 : null;
     self::use(let final dynamic #t73 = super.d in #t73.==(null) ? super.d = 42 : #t73);
     super.e.==(null) ? let final dynamic #t74 = 42 in let final dynamic #t75 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t74].toList(growable: false), true)) in #t74 : null;
     self::use(let final dynamic #t76 = super.e in #t76.==(null) ? let final dynamic #t77 = 42 in let final dynamic #t78 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t77].toList(growable: false), true)) in #t77 : #t76);
     super.f.==(null) ? let final dynamic #t79 = 42 in let final dynamic #t80 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t79].toList(growable: false), true)) in #t79 : null;
     self::use(let final dynamic #t81 = super.f in #t81.==(null) ? let final dynamic #t82 = 42 in let final dynamic #t83 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t82].toList(growable: false), true)) in #t82 : #t81);
     super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).==(null) ? super.g = 42 : null;
     self::use(let final dynamic #t84 = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)) in #t84.==(null) ? super.g = 42 : #t84);
     super.h.==(null) ? super.h = 42 : null;
     self::use(let final dynamic #t85 = super.h in #t85.==(null) ? super.h = 42 : #t85);
     super.i.==(null) ? super.i = 42 : null;
     self::use(let final dynamic #t86 = super.i in #t86.==(null) ? super.i = 42 : #t86);
-    let final dynamic #t87 = 87 in super.[](#t87).==(null) ? let final dynamic #t88 = 42 in let final dynamic #t89 = super.[]=(#t87, #t88) in #t88 : null;
-    self::use(let final dynamic #t90 = 87 in let final dynamic #t91 = super.[](#t90) in #t91.==(null) ? let final dynamic #t92 = 42 in let final dynamic #t93 = super.[]=(#t90, #t92) in #t92 : #t91);
+    let final dynamic #t87 = 87 in super.{self::A::[]}(#t87).==(null) ? let final dynamic #t88 = 42 in let final dynamic #t89 = super.{self::A::[]=}(#t87, #t88) in #t88 : null;
+    self::use(let final dynamic #t90 = 87 in let final dynamic #t91 = super.{self::A::[]}(#t90) in #t91.==(null) ? let final dynamic #t92 = 42 in let final dynamic #t93 = super.{self::A::[]=}(#t90, #t92) in #t92 : #t91);
     super.m.==(null) ? let final dynamic #t94 = 42 in let final dynamic #t95 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t94].toList(growable: false), true)) in #t94 : null;
     self::use(let final dynamic #t96 = super.m in #t96.==(null) ? let final dynamic #t97 = 42 in let final dynamic #t98 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t97].toList(growable: false), true)) in #t97 : #t96);
     super.a = super.a.+(42);
     self::use(super.a = super.a.+(42));
     super.b = super.b.+(42);
     self::use(super.b = super.b.+(42));
     super.c = super.c.+(42);
     self::use(super.c = super.c.+(42));
     super.d = super.d.+(42);
     self::use(super.d = super.d.+(42));
     let final dynamic #t99 = super.e.+(42) in let final dynamic #t100 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t99].toList(growable: false), true)) in #t99;
     self::use(let final dynamic #t101 = super.e.+(42) in let final dynamic #t102 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t101].toList(growable: false), true)) in #t101);
     let final dynamic #t103 = super.f.+(42) in let final dynamic #t104 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t103].toList(growable: false), true)) in #t103;
     self::use(let final dynamic #t105 = super.f.+(42) in let final dynamic #t106 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t105].toList(growable: false), true)) in #t105);
     super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).+(42);
     self::use(super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).+(42));
     super.h = super.h.+(42);
     self::use(super.h = super.h.+(42));
     super.i = super.i.+(42);
     self::use(super.i = super.i.+(42));
-    let final dynamic #t107 = 87 in super.[]=(#t107, super.[](#t107).+(42));
-    self::use(let final dynamic #t108 = 87 in let final dynamic #t109 = super.[](#t108).+(42) in let final dynamic #t110 = super.[]=(#t108, #t109) in #t109);
+    let final dynamic #t107 = 87 in super.{self::A::[]=}(#t107, super.{self::A::[]}(#t107).+(42));
+    self::use(let final dynamic #t108 = 87 in let final dynamic #t109 = super.{self::A::[]}(#t108).+(42) in let final dynamic #t110 = super.{self::A::[]=}(#t108, #t109) in #t109);
     let final dynamic #t111 = super.m.+(42) in let final dynamic #t112 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t111].toList(growable: false), true)) in #t111;
     self::use(let final dynamic #t113 = super.m.+(42) in let final dynamic #t114 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t113].toList(growable: false), true)) in #t113);
     super.a = super.a.-(42);
     self::use(super.a = super.a.-(42));
     super.b = super.b.-(42);
     self::use(super.b = super.b.-(42));
     super.c = super.c.-(42);
     self::use(super.c = super.c.-(42));
     super.d = super.d.-(42);
     self::use(super.d = super.d.-(42));
     let final dynamic #t115 = super.e.-(42) in let final dynamic #t116 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t115].toList(growable: false), true)) in #t115;
     self::use(let final dynamic #t117 = super.e.-(42) in let final dynamic #t118 = super.noSuchMethod(new core::_InvocationMirror::•("set:e", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t117].toList(growable: false), true)) in #t117);
     let final dynamic #t119 = super.f.-(42) in let final dynamic #t120 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t119].toList(growable: false), true)) in #t119;
     self::use(let final dynamic #t121 = super.f.-(42) in let final dynamic #t122 = super.noSuchMethod(new core::_InvocationMirror::•("set:f", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t121].toList(growable: false), true)) in #t121);
     super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).-(42);
     self::use(super.g = super.noSuchMethod(new core::_InvocationMirror::•("get:g", <dynamic>[0, 1, 1].toList(growable: false), <dynamic>[this].toList(growable: false), true)).-(42));
     super.h = super.h.-(42);
     self::use(super.h = super.h.-(42));
     super.i = super.i.-(42);
     self::use(super.i = super.i.-(42));
-    let final dynamic #t123 = 87 in super.[]=(#t123, super.[](#t123).-(42));
-    self::use(let final dynamic #t124 = 87 in let final dynamic #t125 = super.[](#t124).-(42) in let final dynamic #t126 = super.[]=(#t124, #t125) in #t125);
+    let final dynamic #t123 = 87 in super.{self::A::[]=}(#t123, super.{self::A::[]}(#t123).-(42));
+    self::use(let final dynamic #t124 = 87 in let final dynamic #t125 = super.{self::A::[]}(#t124).-(42) in let final dynamic #t126 = super.{self::A::[]=}(#t124, #t125) in #t125);
     let final dynamic #t127 = super.m.-(42) in let final dynamic #t128 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t127].toList(growable: false), true)) in #t127;
     self::use(let final dynamic #t129 = super.m.-(42) in let final dynamic #t130 = super.noSuchMethod(new core::_InvocationMirror::•("set:m", <dynamic>[0, 2, 2].toList(growable: false), <dynamic>[this, #t129].toList(growable: false), true)) in #t129);
   }
 }
 static method use(dynamic x) → dynamic {
   if(x.==(new core::DateTime::now().millisecondsSinceEpoch))
     throw "Shouldn't happen";
 }
 static method main() → dynamic {
   try {
     new self::C::•().test();
   }
   on core::NoSuchMethodError catch(no-exception-var) {
     return;
   }
   throw "Test failed";
 }