From 25148899a17ef683f3c66a22a167120d95f7b6ac Mon Sep 17 00:00:00 2001
From: Eugene Yokota <eed3si9n@gmail.com>
Date: Sun, 9 May 2021 18:55:04 -0400
Subject: [PATCH] Skip zip file manipulation if the package is empty

Fixes https://github.com/sbt/sbt/issues/6497
---
 main/src/main/scala/sbt/internal/RemoteCache.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/main/src/main/scala/sbt/internal/RemoteCache.scala b/main/src/main/scala/sbt/internal/RemoteCache.scala
index 6e46f607f..4c885551f 100644
--- a/main/src/main/scala/sbt/internal/RemoteCache.scala
+++ b/main/src/main/scala/sbt/internal/RemoteCache.scala
@@ -163,7 +163,8 @@ object RemoteCache {
           val artp = artifactPath.value
           val af = compileAnalysisFile.value
           IO.copyFile(original, artp)
-          if (af.exists) {
+          // skip zip manipulation if the artp is a blank file
+          if (af.exists && artp.length() > 0) {
             JarUtils.includeInJar(artp, Vector(af -> s"META-INF/inc_compile.zip"))
           }
           // val testStream = (test / streams).?.value