update-cache.c: 11388582a830a6161d1c769aa8616bed6f593b8a
--- a/update-cache.c
+++ b/update-cache.c
@@ -98,6 +98,7 @@ static int add_file_to_cache(char *path)
 
 	fd = open(path, O_RDONLY);
 	if (fd < 0) {
+		fprintf(stderr, "update-cache Error: %s\n", strerror(errno));
 		if (errno == ENOENT) {
 			if (allow_remove)
 				return remove_file_from_cache(path);