A modern programming language that makes developers happier.

kotlinlang

```
Exception in thread "main" java.lang.VerifyError: Bad invokespecial instruction: current class isn't assignable to reference class.
Exception Details:
  Location:
    com/yoavst/mashov/controller/ApiControllerImpl.getGrades(Ljava/lang/String;Ljava/lang/String;)Lnl/komponents/kovenant/Promise; @33: invokespecial
  Reason:
    Error exists in the bytecode
  Bytecode:
    0x0000000: 2b12 b4b8 0059 2c12 cab8 0059 2a4e b200
    0x0000010: 2f2c b800 ce3a 0400 2db8 00d2 1904 b200
    0x0000020: 2fb7 00d6 b200 2f2b b700 dab8 00c1 0107
    0x0000030: b800 3fb2 00df c000 47b8 004d b0       

	at com.yoavst.mashov.TestingKt.main(Testing.kt:8)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
```

:O