Emit a message if we found invalid or incomplete multibyte sequences

src/iri.c

@@ -185,6 +185,10 @@ do_conversion (iconv_t cd, char *in, size_t inlen, char **out)
       /* Incomplete or invalid multibyte sequence */
       if (errno == EINVAL || errno == EILSEQ)
         {
+          if (!invalid)
+            logprintf (LOG_VERBOSE,
+                      "Incomplete or invalide multibyte sequence encountered\n");
+
           invalid++;
           **out = *in;
           in++;