From 155ae98e49beadc294b47f0ecf76b3bdafba16f0 Mon Sep 17 00:00:00 2001
From: Sheng Chen <sheche@microsoft.com>
Date: Thu, 17 Nov 2022 15:51:43 +0800
Subject: [PATCH] Fix NPE in ClasspathMultiDirectory#directoryList()

Signed-off-by: Sheng Chen <sheche@microsoft.com>
---
 .../jdt/internal/core/builder/ClasspathMultiDirectory.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/builder/ClasspathMultiDirectory.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/builder/ClasspathMultiDirectory.java
index e127fb7c718..f13dfa75877 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/builder/ClasspathMultiDirectory.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/builder/ClasspathMultiDirectory.java
@@ -75,6 +75,9 @@ protected boolean isExcluded(IResource resource) {
 }
 @Override
 String[] directoryList(String qualifiedPackageName) {
+	if (this.directoryCache == null) {
+		this.reset();
+	}
 	String[] dirList = (String[]) this.directoryCache.get(qualifiedPackageName);
 	if (dirList != null) return dirList;