From 9ec708ebf371e4bca70a4106d7054b0612a83971 Mon Sep 17 00:00:00 2001
From: Cedric Beust <cedric@beust.com>
Date: Sat, 22 Apr 2017 21:28:31 -0700
Subject: [PATCH] Bug with kapt when no Java files are present.

---
 .../kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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 43a9c6dd..4688d46f 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
@@ -172,7 +172,10 @@ open class JvmCompilerPlugin @Inject constructor(
                     if (wi.value.sourceSuffixes.contains("java")) ij = wi.index
                     if (wi.value.sourceSuffixes.contains("kt")) ik = wi.index
                 }
-                Collections.swap(result, ik, ij)
+
+                if (ik >= 0 && ij >= 0) {
+                    Collections.swap(result, ik, ij)
+                }
                 return result
             }