diff --git a/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/BlameTest.java b/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/BlameTest.java
index e806872..6da1e46 100644
--- a/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/BlameTest.java
+++ b/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/BlameTest.java
@@ -42,8 +42,14 @@
  */
 package org.eclipse.jgit.pgm;
 
+import static org.junit.Assert.assertTrue;
+
 import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.MergeResult;
 import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.PersonIdent;
+import org.eclipse.jgit.revwalk.RevCommit;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -85,7 +91,7 @@ public void testBlameStaged() throws Exception {
 			git.add().addFilepattern("inIndex.txt").call();
 		}
 		assertStringArrayEquals(
-				"         (Not Committed Yet          1) index",
+				"00000000 (Not Committed Yet 2009-08-15 20:12:58 -0330 1) index",
 				execute("git blame inIndex.txt"));
 	}
 
@@ -119,4 +125,36 @@ public void testBlameNonExistingInSubdir() throws Exception {
 		thrown.expectMessage("no such path 'sub/does_not_exist.txt' in HEAD");
 		execute("git blame sub/does_not_exist.txt");
 	}
+
+	@Test
+	public void testBlameMergeConflict() throws Exception {
+		try (Git git = new Git(db)) {
+			writeTrashFile("file", "Origin\n");
+			git.add().addFilepattern("file").call();
+			git.commit().setMessage("initial commit").call();
+			git.checkout().setCreateBranch(true)
+					.setName("side").call();
+			writeTrashFile("file",
+					"Conflicting change from side branch\n");
+			git.add().addFilepattern("file").call();
+			RevCommit side = git.commit().setMessage("side commit")
+					.setCommitter(new PersonIdent("gitter", "")).call();
+			git.checkout().setName(Constants.MASTER).call();
+			writeTrashFile("file", "Change on master branch\n");
+			git.add().addFilepattern("file").call();
+			git.commit().setMessage("Commit conflict on master")
+					.setCommitter(new PersonIdent("gitter", "")).call();
+			MergeResult result = git.merge()
+					.include("side", side).call();
+			assertTrue("Expected conflict on 'file'",
+					result.getConflicts().containsKey("file"));
+		}
+		String[] expected = {
+				"00000000 (Not Committed Yet 2009-08-15 20:12:58 -0330 1) <<<<<<< HEAD",
+				"0f5b671c (gitter            2009-08-15 20:12:58 -0330 2) Change on master branch",
+				"00000000 (Not Committed Yet 2009-08-15 20:12:58 -0330 3) =======",
+				"ae78cff6 (gitter            2009-08-15 20:12:58 -0330 4) Conflicting change from side branch",
+				"00000000 (Not Committed Yet 2009-08-15 20:12:58 -0330 5) >>>>>>> side" };
+		assertArrayOfLinesEquals(expected, execute("git blame file"));
+	}
 }
diff --git a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Blame.java b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Blame.java
index b67b04c..1a4c111 100644
--- a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Blame.java
+++ b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Blame.java
@@ -50,7 +50,6 @@
 import static java.lang.Long.valueOf;
 import static org.eclipse.jgit.lib.Constants.OBJECT_ID_STRING_LENGTH;
 
-import java.io.File;
 import java.io.IOException;
 import java.text.MessageFormat;
 import java.text.SimpleDateFormat;
@@ -60,11 +59,11 @@
 import java.util.Map;
 import java.util.regex.Pattern;
 
+import org.eclipse.jgit.api.errors.NoHeadException;
 import org.eclipse.jgit.blame.BlameGenerator;
 import org.eclipse.jgit.blame.BlameResult;
 import org.eclipse.jgit.diff.RawText;
 import org.eclipse.jgit.diff.RawTextComparator;
-import org.eclipse.jgit.dircache.DirCache;
 import org.eclipse.jgit.errors.NoWorkTreeException;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
@@ -134,6 +133,9 @@ void ignoreAllSpace(@SuppressWarnings("unused") boolean on) {
 
 	private BlameResult blame;
 
+	/** Used to get a current time stamp for lines without commit. */
+	private final PersonIdent dummyDate = new PersonIdent("", ""); //$NON-NLS-1$ //$NON-NLS-2$
+
 	/** {@inheritDoc} */
 	@Override
 	protected void run() {
@@ -186,28 +188,7 @@ protected void run() {
 				}
 				generator.push(null, rev);
 			} else {
-				ObjectId head = db.resolve(Constants.HEAD);
-				if (head == null) {
-					throw die(MessageFormat.format(CLIText.get().noSuchRef,
-							Constants.HEAD));
-				}
-				generator.push(null, head);
-				if (!db.isBare()) {
-					DirCache dc = db.readDirCache();
-					int entry = dc.findEntry(file);
-					if (0 <= entry) {
-						generator.push(null, dc.getEntry(entry).getObjectId());
-					} else {
-						throw die(MessageFormat.format(
-								CLIText.get().noSuchPathInRef, file,
-								Constants.HEAD));
-					}
-
-					File inTree = new File(db.getWorkTree(), file);
-					if (db.getFS().isFile(inTree)) {
-						generator.push(null, new RawText(inTree));
-					}
-				}
+				generator.prepareHead();
 			}
 
 			blame = BlameResult.create(generator);
@@ -236,6 +217,10 @@ protected void run() {
 					authorWidth = Math.max(authorWidth, author(line).length());
 					dateWidth = Math.max(dateWidth, date(line).length());
 					pathWidth = Math.max(pathWidth, path(line).length());
+				} else if (c == null) {
+					authorWidth = Math.max(authorWidth, author(line).length());
+					dateWidth = Math.max(dateWidth, date(line).length());
+					pathWidth = Math.max(pathWidth, path(line).length());
 				}
 				while (line + 1 < end
 						&& sameCommit(blame.getSourceCommit(line + 1), c)) {
@@ -280,7 +265,7 @@ && sameCommit(blame.getSourceCommit(line + 1), c)) {
 				} while (++line < end
 						&& sameCommit(blame.getSourceCommit(line), c));
 			}
-		} catch (NoWorkTreeException | IOException e) {
+		} catch (NoWorkTreeException | NoHeadException | IOException e) {
 			throw die(e.getMessage(), e);
 		}
 	}
@@ -373,10 +358,12 @@ private String author(int line) {
 	}
 
 	private String date(int line) {
-		if (blame.getSourceCommit(line) == null)
-			return ""; //$NON-NLS-1$
-
-		PersonIdent author = blame.getSourceAuthor(line);
+		PersonIdent author;
+		if (blame.getSourceCommit(line) == null) {
+			author = dummyDate;
+		} else {
+			author = blame.getSourceAuthor(line);
+		}
 		if (author == null)
 			return ""; //$NON-NLS-1$
 
@@ -394,28 +381,37 @@ private String abbreviate(ObjectReader reader, RevCommit commit)
 		if (r != null)
 			return r;
 
-		if (showBlankBoundary && commit.getParentCount() == 0)
-			commit = null;
-
 		if (commit == null) {
-			int len = showLongRevision ? OBJECT_ID_STRING_LENGTH : (abbrev + 1);
-			StringBuilder b = new StringBuilder(len);
-			for (int i = 0; i < len; i++)
-				b.append(' ');
-			r = b.toString();
-
-		} else if (!root && commit.getParentCount() == 0) {
-			if (showLongRevision)
-				r = "^" + commit.name().substring(0, OBJECT_ID_STRING_LENGTH - 1); //$NON-NLS-1$
-			else
-				r = "^" + reader.abbreviate(commit, abbrev).name(); //$NON-NLS-1$
+			if (showLongRevision) {
+				r = ObjectId.zeroId().name();
+			} else {
+				r = ObjectId.zeroId().abbreviate(abbrev + 1).name();
+			}
 		} else {
-			if (showLongRevision)
-				r = commit.name();
-			else
-				r = reader.abbreviate(commit, abbrev + 1).name();
-		}
+			if (showBlankBoundary && commit.getParentCount() == 0)
+				commit = null;
 
+			if (commit == null) {
+				int len = showLongRevision ? OBJECT_ID_STRING_LENGTH
+						: (abbrev + 1);
+				StringBuilder b = new StringBuilder(len);
+				for (int i = 0; i < len; i++)
+					b.append(' ');
+				r = b.toString();
+
+			} else if (!root && commit.getParentCount() == 0) {
+				if (showLongRevision)
+					r = "^" + commit.name().substring(0, //$NON-NLS-1$
+							OBJECT_ID_STRING_LENGTH - 1);
+				else
+					r = "^" + reader.abbreviate(commit, abbrev).name(); //$NON-NLS-1$
+			} else {
+				if (showLongRevision)
+					r = commit.name();
+				else
+					r = reader.abbreviate(commit, abbrev + 1).name();
+			}
+		}
 		abbreviatedCommits.put(commit, r);
 		return r;
 	}
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/BlameCommandTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/BlameCommandTest.java
index 7e73084..4d1375a 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/BlameCommandTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/BlameCommandTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, GitHub Inc.
+ * Copyright (C) 2011, 2019 GitHub Inc.
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
@@ -44,6 +44,7 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
 import java.io.File;
@@ -462,6 +463,39 @@ public void testConflictingMerge2() throws Exception {
 	}
 
 	@Test
+	public void testUnresolvedMergeConflict() throws Exception {
+		try (Git git = new Git(db)) {
+			RevCommit base = commitFile("file.txt", "Origin\n", "master");
+
+			RevCommit master = commitFile("file.txt",
+					"Change on master branch\n", "master");
+
+			git.checkout().setName("side").setCreateBranch(true)
+					.setStartPoint(base).call();
+			RevCommit side = commitFile("file.txt",
+					"Conflicting change on side\n", "side");
+
+			checkoutBranch("refs/heads/master");
+			MergeResult result = git.merge().include(side).call();
+
+			// The merge results in a conflict, which we do not resolve
+			assertTrue("Expected a conflict",
+					result.getConflicts().containsKey("file.txt"));
+
+			BlameCommand command = new BlameCommand(db);
+			command.setFilePath("file.txt");
+			BlameResult lines = command.call();
+
+			assertEquals(5, lines.getResultContents().size());
+			assertNull(lines.getSourceCommit(0));
+			assertEquals(master, lines.getSourceCommit(1));
+			assertNull(lines.getSourceCommit(2));
+			assertEquals(side, lines.getSourceCommit(3));
+			assertNull(lines.getSourceCommit(4));
+		}
+	}
+
+	@Test
 	public void testWhitespaceMerge() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit base = commitFile("file.txt", join("0", "1", "2"), "master");
diff --git a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
index 882b766..27d3e6a 100644
--- a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
+++ b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
@@ -457,6 +457,7 @@
 nonCommitToHeads=Cannot point a branch to a non-commit object
 noPathAttributesFound=No Attributes found for {0}.
 noSuchRef=no such ref
+noSuchRefKnown=no such ref: {0}
 noSuchSubmodule=no such submodule {0}
 notABoolean=Not a boolean: {0}
 notABundle=not a bundle
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/api/BlameCommand.java b/org.eclipse.jgit/src/org/eclipse/jgit/api/BlameCommand.java
index 0c765b0..a69aa70 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/BlameCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/BlameCommand.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, GitHub Inc.
+ * Copyright (C) 2011, 2019 GitHub Inc.
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
@@ -42,11 +42,7 @@
  */
 package org.eclipse.jgit.api;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -56,17 +52,10 @@
 import org.eclipse.jgit.blame.BlameGenerator;
 import org.eclipse.jgit.blame.BlameResult;
 import org.eclipse.jgit.diff.DiffAlgorithm;
-import org.eclipse.jgit.diff.RawText;
 import org.eclipse.jgit.diff.RawTextComparator;
-import org.eclipse.jgit.dircache.DirCache;
 import org.eclipse.jgit.lib.AnyObjectId;
-import org.eclipse.jgit.lib.Constants;
-import org.eclipse.jgit.lib.CoreConfig.AutoCRLF;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Repository;
-import org.eclipse.jgit.treewalk.WorkingTreeOptions;
-import org.eclipse.jgit.util.IO;
-import org.eclipse.jgit.util.io.AutoLFInputStream;
 
 /**
  * Blame command for building a {@link org.eclipse.jgit.blame.BlameResult} for a
@@ -221,68 +210,11 @@ public BlameResult call() throws GitAPIException {
 			else if (startCommit != null)
 				gen.push(null, startCommit);
 			else {
-				gen.push(null, repo.resolve(Constants.HEAD));
-				if (!repo.isBare()) {
-					DirCache dc = repo.readDirCache();
-					int entry = dc.findEntry(path);
-					if (0 <= entry)
-						gen.push(null, dc.getEntry(entry).getObjectId());
-
-					File inTree = new File(repo.getWorkTree(), path);
-					if (repo.getFS().isFile(inTree)) {
-						RawText rawText = getRawText(inTree);
-						gen.push(null, rawText);
-					}
-				}
+				gen.prepareHead();
 			}
 			return gen.computeBlameResult();
 		} catch (IOException e) {
 			throw new JGitInternalException(e.getMessage(), e);
 		}
 	}
-
-	private RawText getRawText(File inTree) throws IOException,
-			FileNotFoundException {
-		RawText rawText;
-
-		WorkingTreeOptions workingTreeOptions = getRepository().getConfig()
-				.get(WorkingTreeOptions.KEY);
-		AutoCRLF autoCRLF = workingTreeOptions.getAutoCRLF();
-		switch (autoCRLF) {
-		case FALSE:
-		case INPUT:
-			// Git used the repo format on checkout, but other tools
-			// may change the format to CRLF. We ignore that here.
-			rawText = new RawText(inTree);
-			break;
-		case TRUE:
-			try (AutoLFInputStream in = new AutoLFInputStream(
-					new FileInputStream(inTree), true)) {
-				// Canonicalization should lead to same or shorter length
-				// (CRLF to LF), so the file size on disk is an upper size bound
-				rawText = new RawText(toByteArray(in, (int) inTree.length()));
-			}
-			break;
-		default:
-			throw new IllegalArgumentException(
-					"Unknown autocrlf option " + autoCRLF); //$NON-NLS-1$
-		}
-		return rawText;
-	}
-
-	private static byte[] toByteArray(InputStream source, int upperSizeLimit)
-			throws IOException {
-		byte[] buffer = new byte[upperSizeLimit];
-		try {
-			int read = IO.readFully(source, buffer, 0);
-			if (read == upperSizeLimit) {
-				return buffer;
-			}
-			byte[] copy = new byte[read];
-			System.arraycopy(buffer, 0, copy, 0, read);
-			return copy;
-		} finally {
-			source.close();
-		}
-	}
 }
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java b/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
index 9cec645..d0aa292 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/blame/BlameGenerator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, Google Inc.
+ * Copyright (C) 2011, 2019 Google Inc.
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
@@ -48,11 +48,17 @@
 import static org.eclipse.jgit.lib.FileMode.TYPE_MASK;
 
 import java.io.IOException;
+import java.io.InputStream;
+import java.text.MessageFormat;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 
 import org.eclipse.jgit.annotations.Nullable;
+import org.eclipse.jgit.api.errors.NoHeadException;
 import org.eclipse.jgit.blame.Candidate.BlobCandidate;
+import org.eclipse.jgit.blame.Candidate.HeadCandidate;
 import org.eclipse.jgit.blame.Candidate.ReverseCandidate;
 import org.eclipse.jgit.blame.ReverseWalk.ReverseCommit;
 import org.eclipse.jgit.diff.DiffAlgorithm;
@@ -63,8 +69,13 @@
 import org.eclipse.jgit.diff.RawText;
 import org.eclipse.jgit.diff.RawTextComparator;
 import org.eclipse.jgit.diff.RenameDetector;
+import org.eclipse.jgit.dircache.DirCache;
+import org.eclipse.jgit.dircache.DirCacheEntry;
+import org.eclipse.jgit.dircache.DirCacheIterator;
+import org.eclipse.jgit.errors.NoWorkTreeException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.lib.AnyObjectId;
+import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.MutableObjectId;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectLoader;
@@ -74,9 +85,12 @@
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevFlag;
 import org.eclipse.jgit.revwalk.RevWalk;
+import org.eclipse.jgit.treewalk.FileTreeIterator;
 import org.eclipse.jgit.treewalk.TreeWalk;
+import org.eclipse.jgit.treewalk.TreeWalk.OperationType;
 import org.eclipse.jgit.treewalk.filter.PathFilter;
 import org.eclipse.jgit.treewalk.filter.TreeFilter;
+import org.eclipse.jgit.util.IO;
 
 /**
  * Generate author information for lines based on a provided file.
@@ -313,6 +327,107 @@ public BlameGenerator push(String description, RawText contents)
 	}
 
 	/**
+	 * Pushes HEAD, index, and working tree as appropriate for blaming the file
+	 * given in the constructor {@link #BlameGenerator(Repository, String)}
+	 * against HEAD. Includes special handling in case the file is in conflict
+	 * state from an unresolved merge conflict.
+	 *
+	 * @return {@code this}
+	 * @throws NoHeadException
+	 *             if the repository has no HEAD
+	 * @throws IOException
+	 *             if an error occurs
+	 * @since 5.6
+	 */
+	public BlameGenerator prepareHead() throws NoHeadException, IOException {
+		Repository repo = getRepository();
+		ObjectId head = repo.resolve(Constants.HEAD);
+		if (head == null) {
+			throw new NoHeadException(MessageFormat
+					.format(JGitText.get().noSuchRefKnown, Constants.HEAD));
+		}
+		if (repo.isBare()) {
+			return push(null, head);
+		}
+		DirCache dc = repo.readDirCache();
+		try (TreeWalk walk = new TreeWalk(repo)) {
+			walk.setOperationType(OperationType.CHECKIN_OP);
+			FileTreeIterator iter = new FileTreeIterator(repo);
+			int fileTree = walk.addTree(iter);
+			int indexTree = walk.addTree(new DirCacheIterator(dc));
+			iter.setDirCacheIterator(walk, indexTree);
+			walk.setFilter(resultPath);
+			walk.setRecursive(true);
+			if (!walk.next()) {
+				return this;
+			}
+			DirCacheIterator dcIter = walk.getTree(indexTree,
+					DirCacheIterator.class);
+			if (dcIter == null) {
+				// Not found in index
+				return this;
+			}
+			iter = walk.getTree(fileTree, FileTreeIterator.class);
+			if (iter == null || !isFile(iter.getEntryRawMode())) {
+				return this;
+			}
+			RawText inTree;
+			long filteredLength = iter.getEntryContentLength();
+			try (InputStream stream = iter.openEntryStream()) {
+				inTree = new RawText(getBytes(iter.getEntryFile().getPath(),
+						stream, filteredLength));
+			}
+			DirCacheEntry indexEntry = dcIter.getDirCacheEntry();
+			if (indexEntry.getStage() == DirCacheEntry.STAGE_0) {
+				push(null, head);
+				push(null, indexEntry.getObjectId());
+				push(null, inTree);
+			} else {
+				// Create a special candidate using the working tree file as
+				// blob and HEAD and the MERGE_HEADs as parents.
+				HeadCandidate c = new HeadCandidate(getRepository(), resultPath,
+						getHeads(repo, head));
+				c.sourceText = inTree;
+				c.regionList = new Region(0, 0, inTree.size());
+				remaining = inTree.size();
+				push(c);
+			}
+		}
+		return this;
+	}
+
+	private List<RevCommit> getHeads(Repository repo, ObjectId head)
+			throws NoWorkTreeException, IOException {
+		List<ObjectId> mergeIds = repo.readMergeHeads();
+		if (mergeIds == null || mergeIds.isEmpty()) {
+			return Collections.singletonList(revPool.parseCommit(head));
+		}
+		List<RevCommit> heads = new ArrayList<>(mergeIds.size() + 1);
+		heads.add(revPool.parseCommit(head));
+		for (ObjectId id : mergeIds) {
+			heads.add(revPool.parseCommit(id));
+		}
+		return heads;
+	}
+
+	private static byte[] getBytes(String path, InputStream in, long maxLength)
+			throws IOException {
+		if (maxLength > Integer.MAX_VALUE) {
+			throw new IOException(
+					MessageFormat.format(JGitText.get().fileIsTooLarge, path));
+		}
+		int max = (int) maxLength;
+		byte[] buffer = new byte[max];
+		int read = IO.readFully(in, buffer, 0);
+		if (read == max) {
+			return buffer;
+		}
+		byte[] copy = new byte[read];
+		System.arraycopy(buffer, 0, copy, 0, read);
+		return copy;
+	}
+
+	/**
 	 * Push a candidate object onto the generator's traversal stack.
 	 * <p>
 	 * Candidates should be pushed in history order from oldest-to-newest.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/blame/Candidate.java b/org.eclipse.jgit/src/org/eclipse/jgit/blame/Candidate.java
index 457d1d2..3ef4943 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/blame/Candidate.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/blame/Candidate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, Google Inc.
+ * Copyright (C) 2011, 2019 Google Inc.
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
@@ -44,12 +44,14 @@
 package org.eclipse.jgit.blame;
 
 import java.io.IOException;
+import java.util.List;
 
 import org.eclipse.jgit.blame.ReverseWalk.ReverseCommit;
 import org.eclipse.jgit.diff.Edit;
 import org.eclipse.jgit.diff.EditList;
 import org.eclipse.jgit.diff.RawText;
 import org.eclipse.jgit.errors.MissingObjectException;
+import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectLoader;
@@ -392,6 +394,66 @@ public String toString() {
 	}
 
 	/**
+	 * A {@link Candidate} to blame a working tree file in conflict state.
+	 * <p>
+	 * Contrary to {@link BlobCandidate}, it expects to be given the parent
+	 * commits (typically HEAD and the MERGE_HEADs) and behaves like a merge
+	 * commit during blame. It does <em>not</em> consider a previously pushed
+	 * Candidate as its parent.
+	 * </p>
+	 */
+	static final class HeadCandidate extends Candidate {
+
+		private List<RevCommit> parents;
+
+		HeadCandidate(Repository repo, PathFilter path,
+				List<RevCommit> parents) {
+			super(repo, null, path);
+			this.parents = parents;
+		}
+
+		@Override
+		void beginResult(RevWalk rw) {
+			// Blob candidates have nothing to prepare.
+		}
+
+		@Override
+		int getParentCount() {
+			return parents.size();
+		}
+
+		@Override
+		RevCommit getParent(int idx) {
+			return parents.get(idx);
+		}
+
+		@Override
+		boolean has(RevFlag flag) {
+			return true; // Pretend flag was added; sourceCommit is null.
+		}
+
+		@Override
+		void add(RevFlag flag) {
+			// Do nothing, sourceCommit is null.
+		}
+
+		@Override
+		void remove(RevFlag flag) {
+			// Do nothing, sourceCommit is null.
+		}
+
+		@Override
+		int getTime() {
+			return Integer.MAX_VALUE;
+		}
+
+		@Override
+		PersonIdent getAuthor() {
+			return new PersonIdent(JGitText.get().blameNotCommittedYet, ""); //$NON-NLS-1$
+		}
+	}
+
+	/**
 	 * Candidate loaded from a file source, and not a commit.
 	 * <p>
 	 * The {@link Candidate#sourceCommit} field is always null on this type of
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
index 65c9629..0cea60f 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
@@ -518,6 +518,7 @@ public static JGitText get() {
 	/***/ public String nonCommitToHeads;
 	/***/ public String noPathAttributesFound;
 	/***/ public String noSuchRef;
+	/***/ public String noSuchRefKnown;
 	/***/ public String noSuchSubmodule;
 	/***/ public String notABoolean;
 	/***/ public String notABundle;