bug: byte EOF may exist in the file

coverind.hpp

@@ -165,7 +165,10 @@ bit_vector create_bitvector_from_file(const std::string filename) {
   bit_vector bv(length, 0);
   char c;
   size_t pos = 0;
-  while ((c = input.get()) != EOF) {
+  while (! input.eof()) {
+    c = input.get();
+    if (input.eof())
+      break;
     int mask = 1<<7;
     while (mask > 0) {
       if (c & mask)