A modern programming language that makes developers happier.

kotlinlang

``` w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath:
    /Users/panmingk/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.2.51/a37c0066df119c02f034bf17159089b588ccc41a/kotlin-stdlib-jdk7-1.2.51.jar (version 1.2)
    /Users/panmingk/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3-M2/e475d291eee6606d4512305413b0c9ed4557cae4/kotlin-stdlib-1.3-M2.jar (version 1.3)
    /Users/panmingk/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3-M2/c7119b78ac604072ee437c973570572eb173b2bc/kotlin-stdlib-common-1.3-M2.jar (version 1.3)
w: Some runtime JAR files in the classpath have an incompatible version. Consider removing them from the classpath
e: java.lang.IllegalStateException: Backend Internal error: Exception during code generation
Cause: Back-end (JVM) Internal error: wrong code generated ```