From 5b243417ad32ca6b2efe0a809a12b18ffcaae06b Mon Sep 17 00:00:00 2001
From: thijsrijpert <dev@rijpert.com>
Date: Fri, 23 Aug 2024 10:32:44 +0200
Subject: [PATCH] [MCOMPILER-592] - IndexOutOfBoundsException when
 project.build.outputTimestamp is empty (#244)

---
 .../apache/maven/plugin/compiler/AbstractCompilerMojo.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java b/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
index 77403e1e..f44bd81d 100644
--- a/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
+++ b/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
@@ -1152,7 +1152,9 @@ public void execute() {
             }
         }
 
-        if (outputTimestamp != null && (outputTimestamp.length() > 1 || Character.isDigit(outputTimestamp.charAt(0)))) {
+        if (outputTimestamp != null
+                && !outputTimestamp.isEmpty()
+                && (outputTimestamp.length() > 1 || Character.isDigit(outputTimestamp.charAt(0)))) {
             // if Reproducible Builds mode, apply workaround
             patchJdkModuleVersion(compilerResult, sources);
         }