Do not throw NPE from IFile.getContents(false) #2290

[basilevs]

IFile.getContents(false) does thread unsafe existence checks, resulting in random exceptions.

eclipse.platform/resources/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/File.java

Lines 354 to 362 in b7cb30f

	/** like {@link #readAllBytes()} **/
	@Override
	public InputStream getContents(boolean force) throws CoreException {
	ResourceInfo info = getResourceInfo(false, false);
	int flags = getFlags(info);
	checkAccessible(flags);
	checkLocal(flags, DEPTH_ZERO);
	return getLocalManager().read(this, force, null);
	}

java.lang.NullPointerException: Cannot invoke "org.eclipse.core.internal.resources.ResourceInfo.getLocalSyncInfo()" because "info" is null
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.getFileStore(FileSystemResourceManager.java:938)
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:919)
	at org.eclipse.core.internal.resources.File.getContents(File.java:361)
	at org.eclipse.core.tests.resources.regression.IFileTest.assertContentAccessibleOrNotFound(IFileTest.java:166)
	at org.eclipse.core.tests.resources.regression.IFileTest.coreExceptionFromGetContentsForDeleted(IFileTest.java:154)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

Ideally, read operations should be synchronized with write operations, but that might break backward compatibility.

This PR works around one of such exceptions by adding an explicit null check.

Error handling is copied from thread-unsafe check:

eclipse.platform/resources/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/Resource.java

Lines 367 to 378 in b7cb30f

	/**
	* Checks that this resource exists.
	* If checkType is true, the type of this resource and the one in the tree must match.
	*
	* @exception CoreException if this resource does not exist
	*/
	public void checkExists(int flags, boolean checkType) throws CoreException {
	if (!exists(flags, checkType)) {
	String message = NLS.bind(Messages.resources_mustExist, getFullPath());
	throw new ResourceException(IResourceStatus.RESOURCE_NOT_FOUND, getFullPath(), message, null);
	}
	}

Fixes #2290

[github-actions]

Test Results

 1 953 files  ±0   1 953 suites  ±0   1h 28m 10s ⏱️ - 1m 28s
 4 745 tests +1   4 721 ✅ +1   24 💤 ±0  0 ❌ ±0 
14 235 runs  +3  14 053 ✅ +3  182 💤 ±0  0 ❌ ±0 

Results for commit 5e2a755. ± Comparison against base commit 0edd6a1.

♻️ This comment has been updated with latest results.

[eclipse-platform-bot]

This pull request changes some projects for the first time in this development cycle.
Therefore the following files need a version increment:

resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
resources/tests/org.eclipse.core.tests.resources/META-INF/MANIFEST.MF
resources/tests/org.eclipse.core.tests.resources/pom.xml

An additional commit containing all the necessary changes was pushed to the top of this PR's branch. To obtain these changes (for example if you want to push more changes) either fetch from your fork or apply the git patch.

Git patch

From 5084df88122db08c0f31b3a56707a9085d339ed1 Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Mon, 1 Dec 2025 14:19:58 +0000
Subject: [PATCH] Version bump(s) for 4.39 stream


diff --git a/resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF b/resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
index 82730f0630..f089e0fbcc 100644
--- a/resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
+++ b/resources/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.core.resources; singleton:=true
-Bundle-Version: 3.23.100.qualifier
+Bundle-Version: 3.23.200.qualifier
 Bundle-Activator: org.eclipse.core.resources.ResourcesPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/resources/tests/org.eclipse.core.tests.resources/META-INF/MANIFEST.MF b/resources/tests/org.eclipse.core.tests.resources/META-INF/MANIFEST.MF
index 0af9e7d8aa..ca13fe1630 100644
--- a/resources/tests/org.eclipse.core.tests.resources/META-INF/MANIFEST.MF
+++ b/resources/tests/org.eclipse.core.tests.resources/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Eclipse Core Tests Resources
 Bundle-SymbolicName: org.eclipse.core.tests.resources; singleton:=true
-Bundle-Version: 3.11.1100.qualifier
+Bundle-Version: 3.11.1200.qualifier
 Bundle-Vendor: Eclipse.org
 Export-Package: org.eclipse.core.tests.filesystem,
  org.eclipse.core.tests.internal.alias,
diff --git a/resources/tests/org.eclipse.core.tests.resources/pom.xml b/resources/tests/org.eclipse.core.tests.resources/pom.xml
index 8ae4d950ae..8e86a6785a 100644
--- a/resources/tests/org.eclipse.core.tests.resources/pom.xml
+++ b/resources/tests/org.eclipse.core.tests.resources/pom.xml
@@ -18,7 +18,7 @@
     <version>4.39.0-SNAPSHOT</version>
   </parent>
   <artifactId>org.eclipse.core.tests.resources</artifactId>
-  <version>3.11.1100-SNAPSHOT</version>
+  <version>3.11.1200-SNAPSHOT</version>
   <packaging>eclipse-test-plugin</packaging>
 
   <properties>
-- 
2.51.2

Further information are available in Common Build Issues - Missing version increments.