From 7a25af0f2f841eb27af4b56e36a6eac690532d23 Mon Sep 17 00:00:00 2001
From: Alexander Udalov <Alexander.Udalov@jetbrains.com>
Date: Mon, 17 Apr 2017 18:40:35 +0300
Subject: [PATCH] Fix NPE caused by KotlinCompileMojoBase if no "Xcoroutines"
 value is passed

NPE was happening in CLICompiler.chooseCoroutinesApplicabilityLevel
---
 .../org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java b/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java
index 49cde0ff5cf..6aa9064f9ad 100644
--- a/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java
+++ b/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java
@@ -452,9 +452,12 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
         arguments.suppressWarnings = nowarn;
         arguments.languageVersion = languageVersion;
         arguments.apiVersion = apiVersion;
-        arguments.coroutinesState = experimentalCoroutines;
         arguments.multiPlatform = multiPlatform;
 
+        if (experimentalCoroutines != null) {
+            arguments.coroutinesState = experimentalCoroutines;
+        }
+
         configureSpecificCompilerArguments(arguments);
 
         try {