fixed CHANGES

check if driver failed to load in use_api.ml

CHANGES

@@ -2,8 +2,10 @@
 
   o WhyML with mutable record fields and type models
   o why3replayer
-  * "logic" is not a keyword anymore, use "function" and "predicate"
+  * "parameter" keyword renamed to "val"
   * new syntax for conjunction (/\) and disjunction (\/)
+    ("and" and "or" do not exist anymore)
+  * "logic" is not a keyword anymore, use "function" and "predicate"
   * functions to create an environment are now exported from Env
   o [IDE] bug 12244 resolved by using Task.task_equal
   o fixed Alt-ergo output: no triggers for "exists" quantifier

examples/use_api.ml

@@ -89,7 +89,12 @@ let env : Env.env =
 
 (* loading the Alt-Ergo driver *)
 let alt_ergo_driver : Driver.driver =
+  try
     Driver.load_driver env alt_ergo.Whyconf.driver
+  with e ->
+    eprintf "Failed to load driver for alt-ergo: %a@."
+      Exn_printer.exn_printer e;
+    exit 1
 
 (* call Alt-Ergo *)
 let result1 : Call_provers.prover_result =