From 78b5123328c4227dc31d772133573e09e99c81eb Mon Sep 17 00:00:00 2001
From: Tobias Roeser <le.petit.fou@web.de>
Date: Mon, 26 Aug 2019 21:44:33 +0200
Subject: Fixed StringIndexOutOfBoundsException in case of short artifact names
 (#681)

Fixes https://github.com/lihaoyi/mill/issues/673
---
 scalalib/src/GenIdeaImpl.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scalalib/src/GenIdeaImpl.scala b/scalalib/src/GenIdeaImpl.scala
index 04cd5158..f737d473 100755
--- a/scalalib/src/GenIdeaImpl.scala
+++ b/scalalib/src/GenIdeaImpl.scala
@@ -215,7 +215,7 @@ case class GenIdeaImpl(evaluator: Evaluator,
 
       val artifactId = pom.module.name.value
       val scalaArtifactRegex = ".*_[23]\\.[0-9]{1,2}".r
-      val artifactWithScalaVersion = artifactId.substring(artifactId.length - 5) match {
+      val artifactWithScalaVersion = artifactId.substring(artifactId.length - math.min(5, artifactId.length)) match {
         case scalaArtifactRegex(_*) => artifactId
         case _ => artifactId + "_2.12"
       }
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