Arguably this is invalid code (depending on how one treats accessing unfinished declarations) and should be caught by the FE. But it is not caught, and, as the ICE happens in gdc-land, I'll report it here, JIC it's a symptom of a /real/ bug, and not only a UI issue.


   struct U {
      int a;
      mixin(`enum B { ` ~ U.tupleof[0].stringof ~ ` }`);
      mixin(`B b;`);
   }


->

gdcbugicemix.d:1:0: internal compiler error: in layout_aggregate_type, at d/d-codegen.cc:4480
 
 ^
0x7631ef layout_aggregate_type(AggregateDeclaration*, tree_node*, AggregateDeclaration*)
	../../gcc/d/d-codegen.cc:4480
0x78ad27 TypeVisitor::visit(TypeStruct*)
	../../gcc/d/types.cc:262
0x78aa1d build_ctype(Type*)
	../../gcc/d/types.cc:499
0x758252 AggregateDeclaration::toInitializer()
	../../gcc/d/d-decls.cc:701
0x767a50 StructDeclaration::toObjFile()
	../../gcc/d/d-objfile.cc:238
0x76a9d4 Module::genobjfile(bool)
	../../gcc/d/d-objfile.cc:1424
0x756600 d_parse_file()
	../../gcc/d/d-lang.cc:1211
Please submit a full bug report,