3 files changed, 19 insertions, 2 deletions
diff --git a/t/t3001-ls-files-others-exclude.sh b/t/t3001-ls-files-others-exclude.sh
index 5beaaa3375..fde2bb25fa 100755
--- a/t/t3001-ls-files-others-exclude.sh
+++ b/t/t3001-ls-files-others-exclude.sh
@@ -67,4 +67,16 @@ test_expect_success \
        >output &&
      diff -u expect output'
 
+# Test \r\n (MSDOS-like systems)
+echo -ne '*.1\r\n/*.3\r\n!*.6\r\n' >.gitignore
+
+test_expect_success \
+    'git-ls-files --others with \r\n line endings.' \
+    'git-ls-files --others \
+       --exclude=\*.6 \
+       --exclude-per-directory=.gitignore \
+       --exclude-from=.git/ignore \
+       >output &&
+     diff -u expect output'
+
 test_done
diff --git a/tag.c b/tag.c
index b1ab75ff01..e574c4b7a4 100644
--- a/tag.c
+++ b/tag.c
@@ -3,10 +3,15 @@
 
 const char *tag_type = "tag";
 
-struct object *deref_tag(struct object *o)
+struct object *deref_tag(struct object *o, const char *warn, int warnlen)
 {
 	while (o && o->type == tag_type)
 		o = parse_object(((struct tag *)o)->tagged->sha1);
+	if (!o && warn) {
+		if (!warnlen)
+			warnlen = strlen(warn);
+		error("missing object referenced by '%.*s'", warnlen, warn);
+	}
 	return o;
 }
 
diff --git a/tag.h b/tag.h
index 36e532401f..7a0cb0070d 100644
--- a/tag.h
+++ b/tag.h
@@ -15,6 +15,6 @@ struct tag {
 extern struct tag *lookup_tag(const unsigned char *sha1);
 extern int parse_tag_buffer(struct tag *item, void *data, unsigned long size);
 extern int parse_tag(struct tag *item);
-extern struct object *deref_tag(struct object *);
+extern struct object *deref_tag(struct object *, const char *, int);
 
 #endif /* TAG_H */