1 files changed, 6 insertions, 0 deletions
diff --git a/src/undo.c b/src/undo.c
index 4a4a33cc1..a23c2638f 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -1317,6 +1317,12 @@ unserialize_uhp(bufinfo_T *bi, char_u *file_name)
 	int len = undo_read_byte(bi);
 	int what;
 
+	if (len == EOF)
+	{
+	    corruption_error("truncated", file_name);
+	    u_free_uhp(uhp);
+	    return NULL;
+	}
 	if (len == 0)
 	    break;
 	what = undo_read_byte(bi);