kotlinV1.0.4 error

today i updata my kotolin from V1.0.2 to V1.0.4,when i run my project in AS2.2,it report me Error:Execution failed for task ‘:app:compileDebugKotlin’. > com/intellij/util/containers/EmptyIterator.I check gradle but have no idea about this.someone can help me ?

Finally I found the matter。

my kotlin setting in build.grale like this:
buildscript {
ext.kotlin_version = ‘1.0.2’

repositories {


dependencies {
    classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"


I miss it :ext.kotlin_version = ‘1.0.2’;
So after correcting it .my project goes right.
A small mistake confuse me all day.