Nullability example

example/build.gradle

@@ -0,0 +1,36 @@
+buildscript {
+    ext.kotlin_version = '1.2.10'
+
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+
+apply plugin: 'java'
+apply plugin: 'kotlin'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.6"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "1.6"
+}
+
+dependencies {
+    compile rootProject
+}

example/src/main/java/me/tevjef/Example.java

@@ -0,0 +1,9 @@
+package me.tevjef;
+
+import io.reactivex.Observable;
+
+public class Example {
+    public static void main(String[] args) {
+        Observable.fromIterable(null);
+    }
+}

example/src/main/java/me/tevjef/Example.kt

@@ -0,0 +1,8 @@
+package me.tevjef
+
+import io.reactivex.Observable
+
+fun main(args: Array<String>) {
+    // Compile time failure when fromIterable is annotated with io.reactivex.annotations.NonNull
+    Observable.fromIterable<Int>(null)
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Thu Jan 04 09:42:32 EST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.2.1-all.zip

settings.gradle

@@ -1 +1,3 @@
 rootProject.name='rxjava'
+include 'example'
+

src/main/java/io/reactivex/Observable.java

@@ -1890,7 +1890,7 @@ public static <T> Observable<T> fromFuture(Future<? extends T> future, Scheduler
      */
     @CheckReturnValue
     @SchedulerSupport(SchedulerSupport.NONE)
-    public static <T> Observable<T> fromIterable(Iterable<? extends T> source) {
+    public static <T> Observable<T> fromIterable(@NonNull Iterable<? extends T> source) {
         ObjectHelper.requireNonNull(source, "source is null");
         return RxJavaPlugins.onAssembly(new ObservableFromIterable<T>(source));
     }