Client, Michelson: minor fixes in error reporting

src/proto_alpha/lib_client/michelson_v1_parser.ml

@@ -61,9 +61,7 @@ let expand_all source ast errors =
 let parse_toplevel ?check source =
   let tokens, lexing_errors = Micheline_parser.tokenize source in
   let asts, parsing_errors = Micheline_parser.parse_toplevel ?check tokens in
-  let ast = match asts with
-    | [ ast ] -> ast
-    | asts ->
+  let ast =
     let start = min_point asts and stop = max_point asts in
     Seq ({ start ; stop }, asts, None) in
   expand_all source ast (lexing_errors @ parsing_errors)

src/proto_alpha/lib_client_commands/client_proto_programs_commands.ml

@@ -148,7 +148,7 @@ let commands () =
                     ~details:(not no_print_source) ~parsed
                     ~show_source:(not no_print_source)
                     ppf errors) () >>= fun () ->
-             return ()
+             cctxt#error "syntax error in program"
       ) ;
 
     command ~group ~desc: "Ask the node to typecheck a data expression."

src/proto_alpha/lib_protocol/src/script_ir_translator.ml

@@ -2240,6 +2240,7 @@ and parse_contract
 and parse_toplevel
   : Script.expr -> (Script.node * Script.node * Script.node) tzresult
   = fun toplevel ->
+    record_trace (Ill_typed_contract (toplevel, [])) @@
     match root toplevel with
     | Int (loc, _) -> error (Invalid_kind (loc, [ Seq_kind ], Int_kind))
     | String (loc, _) -> error (Invalid_kind (loc, [ Seq_kind ], String_kind))