added -debug flag which avoid catching top-level exception (usefule for stack backtrace)

diff --git a/helm/matita/matitacLib.ml b/helm/matita/matitacLib.ml
index 9cc063271d801902cd5375661e5a850458fe9424..f7855ac8cc089e77bb5ae05b093cf50585b39721 100644 (file)
--- a/helm/matita/matitacLib.ml
+++ b/helm/matita/matitacLib.ml
@@ -27,6 +27,11 @@ open Printf
 
 open MatitaTypes
 
+  (** If set to true matitac wont catch top level exception, so that backtrace
+   * could be inspected setting OCAMLRUNPARAM=b.
+   * This flag could be enabled passing -debug *)
+let debug = ref false
+
 (** {2 Initialization} *)
 
 let paths_to_search_in = ref [];;
@@ -34,14 +39,15 @@ let quiet_compilation = ref false;;
 let dont_delete_baseuri = ref false;;
 
 let add_l l = fun s -> l := s :: !l ;;
-let set_b b = fun () -> b := true;;
 
 let arg_spec = [
   "-I", Arg.String (add_l paths_to_search_in), 
     "<path> Adds path to the list of searched paths for the include command";
-  "-q", Arg.Unit (set_b quiet_compilation), "Turn off verbose compilation";
-  "-preserve", Arg.Unit (set_b dont_delete_baseuri),
-     "Turns off automatic baseuri cleaning"
+  "-q", Arg.Set quiet_compilation, "Turn off verbose compilation";
+  "-preserve", Arg.Set dont_delete_baseuri,
+    "Turns off automatic baseuri cleaning";
+  "-debug", Arg.Set debug,
+    "Do not catch top-level exception (useful for backtrace inspection)";
 ]
 let usage =
   sprintf "MatitaC v%s\nUsage: matitac [option ...] file\nOptions:"
@@ -238,8 +244,10 @@ let main ~mode =
        clean_exit (Some 1)
      else
        pp_ocaml_mode ()
-  | _ ->
-     if mode = `COMPILER then 
-       clean_exit (Some 3)
-     else 
-       pp_ocaml_mode ()
+  | exn ->
+      if !debug then raise exn;
+      if mode = `COMPILER then 
+        clean_exit (Some 3)
+      else 
+        pp_ocaml_mode ()
+