Wrong bytecode generation for if/else

Run the following piece of code with nashorn, you will get the exception.

function doIt() {
  if (something) {
    coucou = coucou.obj;
  } else {
    var coucou = "coucou";
  }
}


Exception in thread "main" java.lang.VerifyError: Bad local variable type
Exception Details:
  Location:
    jdk/nashorn/internal/scripts/Script$index.parseChar(Ljdk/nashorn/internal/runtime/ScriptFunction;Ljava/lang/Object;)Ljava/lang/Object; @17: aload
  Reason:
    Type top (current frame, locals[4]) is not assignable to reference type
  Current Frame:
    bci: @17
    flags: { }
    locals: { 'jdk/nashorn/internal/runtime/ScriptFunction', 'java/lang/Object', 'jdk/nashorn/internal/runtime/ScriptObject' }
    stack: { }
  Bytecode:
    0000000: 2ab6 0018 4d2c ba00 3400 00b8 003a 9900
    0000010: 0f19 04ba 003d 0000 3a04 a700 0712 3f3a
    0000020: 04b2 0043 b0
  Stackmap Table:
    append_frame(@29,Object[#76])
    append_frame(@33,Top,Object[#78])

at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2367)
at java.lang.Class.getDeclaredField(Class.java:1902)
at jdk.nashorn.internal.codegen.Compiler$2.run(Compiler.java:417)
at jdk.nashorn.internal.codegen.Compiler$2.run(Compiler.java:413)
at java.security.AccessController.doPrivileged(Native Method)
at jdk.nashorn.internal.codegen.Compiler.install(Compiler.java:413)
at jdk.nashorn.internal.codegen.Compiler.install(Compiler.java:447)
at jdk.nashorn.internal.runtime.Context.compile(Context.java:799)
at jdk.nashorn.internal.runtime.Context.compileScript(Context.java:755)
at jdk.nashorn.internal.runtime.Context.compileScript(Context.java:342)
at jdk.nashorn.tools.Shell.runScripts(Shell.java:308)
at jdk.nashorn.tools.Shell.run(Shell.java:178)
at jdk.nashorn.tools.Shell.main(Shell.java:142)
at jdk.nashorn.tools.Shell.main(Shell.java:121)
dhcp-uk-twvpn-2-vpnpool-10-175-51-227:jade jfdenise$ java jdk.nashorn.tools.Shell ./node_modules/character-parser/index.js