Merge branch 'stable-5.6' into stable-5.7

* stable-5.6:
  reftable: drop code for truncated reads
  reftable: pass on invalid object ID in conversion
  Update eclipse-jarsigner-plugin to 1.3.2

Change-Id: I1c18f5f435f4a4a86e0548a310dbfc74191e1ed5

3 files changed, 16 insertions, 23 deletions

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileReftableDatabase.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileReftableDatabase.java
index e613a58062..c7053a16f8 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileReftableDatabase.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileReftableDatabase.java
@@ -26,6 +26,7 @@ import java.util.concurrent.locks.ReentrantLock;
 import java.util.stream.Collectors;
 
 import org.eclipse.jgit.annotations.NonNull;
+import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.events.RefsChangedEvent;
 import org.eclipse.jgit.internal.storage.reftable.MergedReftable;
 import org.eclipse.jgit.internal.storage.reftable.ReftableBatchRefUpdate;
@@ -582,15 +583,20 @@ public class FileReftableDatabase extends RefDatabase {
 					r.getTarget().getName(), null));
 		}
 		ObjectId newId = r.getObjectId();
-		RevObject obj = rw.parseAny(newId);
 		RevObject peel = null;
-		if (obj instanceof RevTag) {
-			peel = rw.peel(obj);
+		try {
+			RevObject obj = rw.parseAny(newId);
+			if (obj instanceof RevTag) {
+				peel = rw.peel(obj);
+			}
+		} catch (MissingObjectException e) {
+			/* ignore this error and copy the dangling object ID into reftable too. */
 		}
 		if (peel != null) {
-			return new ObjectIdRef.PeeledTag(PACKED, r.getName(), newId,
-					peel.copy());
-		}
+				return new ObjectIdRef.PeeledTag(PACKED, r.getName(), newId,
+						peel.copy());
+			}
+
 		return new ObjectIdRef.PeeledNonTag(PACKED, r.getName(), newId);
 	}
 
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/BlockReader.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/BlockReader.java
index 0096312892..d07713db8e 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/BlockReader.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/BlockReader.java
@@ -59,7 +59,6 @@ import org.eclipse.jgit.util.RawParseUtils;
 class BlockReader {
 	private byte blockType;
 	private long endPosition;
-	private boolean truncated;
 
 	private byte[] buf;
 	private int bufLen;
@@ -79,10 +78,6 @@ class BlockReader {
 		return blockType;
 	}
 
-	boolean truncated() {
-		return truncated;
-	}
-
 	long endPosition() {
 		return endPosition;
 	}
@@ -298,16 +293,8 @@ class BlockReader {
 			// Log blocks must be inflated after the header.
 			long deflatedSize = inflateBuf(src, pos, blockLen, fileBlockSize);
 			endPosition = pos + 4 + deflatedSize;
-		}
-		if (bufLen < blockLen) {
-			if (blockType != INDEX_BLOCK_TYPE) {
-				throw invalidBlock();
-			}
-			// Its OK during sequential scan for an index block to have been
-			// partially read and be truncated in-memory. This happens when
-			// the index block is larger than the file's blockSize. Caller
-			// will break out of its scan loop once it sees the blockType.
-			truncated = true;
+		} else if (bufLen < blockLen) {
+			readBlockIntoBuf(src, pos, blockLen);
 		} else if (bufLen > blockLen) {
 			bufLen = blockLen;
 		}
@@ -372,7 +359,7 @@ class BlockReader {
 	}
 
 	void verifyIndex() throws IOException {
-		if (blockType != INDEX_BLOCK_TYPE || truncated) {
+		if (blockType != INDEX_BLOCK_TYPE) {
 			throw invalidBlock();
 		}
 	}
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/ReftableReader.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/ReftableReader.java
index 095276f57b..1e78855784 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/ReftableReader.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftable/ReftableReader.java
@@ -435,7 +435,7 @@ public class ReftableReader extends Reftable implements AutoCloseable {
 
 		BlockReader b = new BlockReader();
 		b.readBlock(src, pos, sz);
-		if (b.type() == INDEX_BLOCK_TYPE && !b.truncated()) {
+		if (b.type() == INDEX_BLOCK_TYPE) {
 			if (indexCache == null) {
 				indexCache = new LongMap<>();
 			}