jjs> function f() { x; throw null; (function (){ var x; }); } f()
Exception in thread "main" java.lang.AssertionError: Couldn't find scope depth for symbol x in [object] function {U%}f()
   at jdk.nashorn.internal.codegen.CodeGenerator.loadFastScopeProto(CodeGenerator.java:516)
   at jdk.nashorn.internal.codegen.CodeGenerator.access$100(CodeGenerator.java:183)
   at jdk.nashorn.internal.codegen.CodeGenerator$LoadFastScopeVar.getProto(CodeGenerator.java:483)
   at jdk.nashorn.internal.codegen.CodeGenerator$LoadScopeVar.loadStack(CodeGenerator.java:456)
   at jdk.nashorn.internal.codegen.CodeGenerator$OptimisticOperation.emit(CodeGenerator.java:4407)
   at jdk.nashorn.internal.codegen.CodeGenerator$OptimisticOperation.emit(CodeGenerator.java:4392)
   at jdk.nashorn.internal.codegen.CodeGenerator.loadIdent(CodeGenerator.java:331)
   at jdk.nashorn.internal.codegen.CodeGenerator.access$400(CodeGenerator.java:183)
   at jdk.nashorn.internal.codegen.CodeGenerator$1.enterIdentNode(CodeGenerator.java:725)
   at jdk.nashorn.internal.ir.IdentNode.accept(IdentNode.java:138)
   ...