From 7818280538b92a6f076deceb9d191124d97ab196 Mon Sep 17 00:00:00 2001
From: Cedric Beust <cedric@beust.com>
Date: Fri, 18 Dec 2015 23:34:00 +0400
Subject: [PATCH] Duplicate sources.

---
 .../kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
index ca6ae78f..d891f33c 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
@@ -249,10 +249,10 @@ abstract class JvmCompilerPlugin @Inject constructor(
         return result
     }
 
-    val sourceDirectories = arrayListOf<File>()
+    val sourceDirectories = hashSetOf<File>()
 
     // ISourceDirectoryContributor
     override fun sourceDirectoriesFor(project: Project, context: KobaltContext)
-            = if (accept(project)) sourceDirectories else arrayListOf()
+            = if (accept(project)) sourceDirectories.toList() else arrayListOf()
 }