mutaml-report fails when source includes menhir or ocamllex code

[WardBrian]

Mutation "src/frontend/lexer.mll-mutant2" passed (see "_mutations/src/frontend/lexer.mll-mutant2.output"):

--- src/frontend/lexer.mll
+++ src/frontend/lexer.mll-mutant2
@@ -7,14 +7,10 @@
   open Debugging
   open Preprocessor
 
-(* Boilerplate for getting line numbers for errors *)
-  let incr_linenum lexbuf =
-    lexer_pos_logger lexbuf.lex_curr_p;
-    let pos = lexbuf.lex_curr_p in
-    lexbuf.lex_curr_p <- { pos with
-      pos_lnum = pos.pos_lnum + 1;
-      pos_bol = pos.pos_cnum } ;
-    update_start_positions lexbuf.lex_curr_p
+(* Boilerplate for getting line numbers for errlet pos = lexbuf.lex_curr_p in
+lexbuf.lex_curr_p <-
+  { pos with pos_lnum = (pos.pos_lnum + 1); pos_bol = (pos.pos_cnum) };
+update_start_positions lexbuf.lex_curr_ppdate_start_positions lexbuf.lex_curr_p
 
   (* Store comments *)
   let add_line_comment (begin_pos, buffer) end_pos =

---------------------------------------------------------------------------

Fatal error: exception Invalid_argument("String.sub / Bytes.sub")

It seems like one solution is to provide an easy way to exclude files from the runner or report, since I'm not necessarily interested in mutation testing for their generated code