Fix NPE when cloning an empty repository

Bug: 337522
Change-Id: I3ad378139a2daf704364fe82a53c9905e0512108
Signed-off-by: Stefan Lay <stefan.lay@sap.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/org.eclipse.egit.core/src/org/eclipse/egit/core/op/CloneOperation.java b/org.eclipse.egit.core/src/org/eclipse/egit/core/op/CloneOperation.java
index 04ac9a0b2d..a92609daa7 100644
--- a/org.eclipse.egit.core/src/org/eclipse/egit/core/op/CloneOperation.java
+++ b/org.eclipse.egit.core/src/org/eclipse/egit/core/op/CloneOperation.java
@@ -175,7 +175,7 @@ public class CloneOperation {
 		local = new FileRepository(gitdir);
 		local.create();
 
-		if (ref.getName().startsWith(Constants.R_HEADS)) {
+		if (ref != null && ref.getName().startsWith(Constants.R_HEADS)) {
 			final RefUpdate head = local.updateRef(Constants.HEAD);
 			head.disableRefLog();
 			head.link(ref.getName());
@@ -207,7 +207,7 @@ public class CloneOperation {
 
 		// branch is like 'Constants.R_HEADS + branchName', we need only
 		// the 'branchName' part
-		if (ref.getName().startsWith(Constants.R_HEADS)) {
+		if (ref != null && ref.getName().startsWith(Constants.R_HEADS)) {
 			String branchName = ref.getName().substring(Constants.R_HEADS.length());
 
 			// setup the default remote branch for branchName
@@ -233,6 +233,8 @@ public class CloneOperation {
 	}
 
 	private void doCheckout(final IProgressMonitor monitor) throws IOException {
+		if (ref == null)
+			return;
 		final Ref head = fetchResult.getAdvertisedRef(ref.getName());
 		if (head == null || head.getObjectId() == null)
 			return;