diff --git a/src/Pure/ML/ml_compiler.ML b/src/Pure/ML/ml_compiler.ML
--- a/src/Pure/ML/ml_compiler.ML
+++ b/src/Pure/ML/ml_compiler.ML
@@ -1,302 +1,302 @@
 (*  Title:      Pure/ML/ml_compiler.ML
     Author:     Makarius
 
 Runtime compilation and evaluation.
 *)
 
 signature ML_COMPILER =
 sig
   type flags =
     {environment: string, redirect: bool, verbose: bool,
       debug: bool option, writeln: string -> unit, warning: string -> unit}
   val debug_flags: bool option -> flags
   val flags: flags
   val verbose: bool -> flags -> flags
   val eval: flags -> Position.T -> ML_Lex.token list -> unit
 end;
 
 structure ML_Compiler: ML_COMPILER =
 struct
 
 (* flags *)
 
 type flags =
   {environment: string, redirect: bool, verbose: bool,
     debug: bool option, writeln: string -> unit, warning: string -> unit};
 
 fun debug_flags opt_debug : flags =
   {environment = "", redirect = false, verbose = false,
     debug = opt_debug, writeln = writeln, warning = warning};
 
 val flags = debug_flags NONE;
 
 fun verbose b (flags: flags) =
   {environment = #environment flags, redirect = #redirect flags, verbose = b,
     debug = #debug flags, writeln = #writeln flags, warning = #warning flags};
 
 
 (* parse trees *)
 
 fun breakpoint_position loc =
   let val pos = Position.no_range_position (Exn_Properties.position_of_polyml_location loc) in
     (case Position.offset_of pos of
       NONE => pos
     | SOME 1 => pos
     | SOME j =>
         Position.properties_of pos
         |> Properties.put (Markup.offsetN, Value.print_int (j - 1))
         |> Position.of_properties)
   end;
 
 fun report_parse_tree redirect depth name_space parse_tree =
   let
     val reports_enabled =
       (case Context.get_generic_context () of
         SOME context => Context_Position.reports_enabled_generic context
       | NONE => Context_Position.reports_enabled0 ());
     fun is_reported pos = reports_enabled andalso Position.is_reported pos;
 
 
     (* syntax reports *)
 
     fun reported_types loc types =
       let val pos = Exn_Properties.position_of_polyml_location loc in
         is_reported pos ?
           let
             val xml =
               PolyML.NameSpace.Values.printType (types, depth, SOME name_space)
               |> Pretty.from_polyml |> Pretty.string_of
               |> Output.output |> YXML.parse_body;
           in cons (pos, fn () => Markup.ML_typing, fn () => YXML.string_of_body xml) end
       end;
 
     fun reported_entity kind loc decl =
       let
         val pos = Exn_Properties.position_of_polyml_location loc;
         val def_pos = Exn_Properties.position_of_polyml_location decl;
       in
         (is_reported pos andalso pos <> def_pos) ?
           cons (pos, fn () => Position.entity_markup kind ("", def_pos), fn () => "")
       end;
 
     fun reported_entity_id def id loc =
       let
         val pos = Exn_Properties.position_of_polyml_location loc;
       in
         (is_reported pos andalso id <> 0) ?
           let
             fun markup () =
               (Markup.entityN, [(if def then Markup.defN else Markup.refN, Value.print_int id)]);
           in cons (pos, markup, fn () => "") end
       end;
 
     fun reported_completions loc names =
       let val pos = Exn_Properties.position_of_polyml_location loc in
         if is_reported pos andalso not (null names) then
           let
             val completion = Completion.names pos (map (fn a => (a, ("ML", a))) names);
             val xml = Completion.encode completion;
           in cons (pos, fn () => Markup.completion, fn () => YXML.string_of_body xml) end
         else I
       end;
 
     fun reported _ (PolyML.PTnextSibling tree) = reported_tree (tree ())
       | reported _ (PolyML.PTfirstChild tree) = reported_tree (tree ())
       | reported loc (PolyML.PTdefId id) = reported_entity_id true (FixedInt.toLarge id) loc
       | reported loc (PolyML.PTrefId id) = reported_entity_id false (FixedInt.toLarge id) loc
       | reported loc (PolyML.PTtype types) = reported_types loc types
       | reported loc (PolyML.PTdeclaredAt decl) = reported_entity Markup.ML_defN loc decl
       | reported loc (PolyML.PTcompletions names) = reported_completions loc names
       | reported _ _ = I
     and reported_tree (loc, props) = fold (reported loc) props;
 
     val persistent_reports = reported_tree parse_tree [];
 
     fun output () =
       persistent_reports
       |> map (fn (pos, markup, text) => Position.reported_text pos (markup ()) (text ()))
       |> Output.report;
     val _ =
       if not (null persistent_reports) andalso redirect andalso
-        not (Options.default_bool "build_pide_reports") andalso Future.enabled ()
+        not (Options.default_bool "pide_reports") andalso Future.enabled ()
       then
         Execution.print
           {name = "ML_Compiler.report", pos = Position.thread_data (), pri = Task_Queue.urgent_pri}
           output
       else output ();
 
 
     (* breakpoints *)
 
     fun breakpoints _ (PolyML.PTnextSibling tree) = breakpoints_tree (tree ())
       | breakpoints _ (PolyML.PTfirstChild tree) = breakpoints_tree (tree ())
       | breakpoints loc (PolyML.PTbreakPoint b) =
           let val pos = breakpoint_position loc in
             if is_reported pos then
               let val id = serial ();
               in cons ((pos, Markup.ML_breakpoint id), (id, (b, pos))) end
             else I
           end
       | breakpoints _ _ = I
     and breakpoints_tree (loc, props) = fold (breakpoints loc) props;
 
     val all_breakpoints = rev (breakpoints_tree parse_tree []);
     val _ = Position.reports (map #1 all_breakpoints);
  in map (fn (_, (id, (b, pos))) => (id, (b, Position.dest pos))) all_breakpoints end;
 
 
 (* eval ML source tokens *)
 
 fun eval (flags: flags) pos toks =
   let
     val opt_context = Context.get_generic_context ();
 
     val env as {debug, name_space, add_breakpoints} =
       (case (ML_Recursive.get (), #environment flags <> "") of
         (SOME env, false) => env
       | _ =>
          {debug =
             (case #debug flags of
               SOME debug => debug
             | NONE => ML_Options.debugger_enabled opt_context),
           name_space = ML_Env.make_name_space (#environment flags),
           add_breakpoints = ML_Env.add_breakpoints});
 
 
     (* input *)
 
     val location_props = op ^ (YXML.output_markup (":", #props (Position.dest pos)));
 
     val {explode_token, ...} = ML_Env.operations opt_context (#environment flags);
     fun token_content tok = if ML_Lex.is_comment tok then NONE else SOME (`explode_token tok);
 
     val input_buffer =
       Unsynchronized.ref (map_filter token_content toks);
 
     fun get () =
       (case ! input_buffer of
         (c :: cs, tok) :: rest => (input_buffer := (cs, tok) :: rest; SOME c)
       | ([], _) :: rest => (input_buffer := rest; SOME #" ")
       | [] => NONE);
 
     fun get_pos () =
       (case ! input_buffer of
         (_ :: _, tok) :: _ => ML_Lex.pos_of tok
       | ([], tok) :: _ => ML_Lex.end_pos_of tok
       | [] => Position.none);
 
 
     (* output *)
 
     val writeln_buffer = Unsynchronized.ref Buffer.empty;
     fun write s = Unsynchronized.change writeln_buffer (Buffer.add s);
     fun output_writeln () = #writeln flags (trim_line (Buffer.content (! writeln_buffer)));
 
     val warnings = Unsynchronized.ref ([]: string list);
     fun warn msg = Unsynchronized.change warnings (cons msg);
     fun output_warnings () = List.app (#warning flags) (rev (! warnings));
 
     val error_buffer = Unsynchronized.ref Buffer.empty;
     fun err msg = Unsynchronized.change error_buffer (Buffer.add msg #> Buffer.add "\n");
     fun flush_error () = #writeln flags (trim_line (Buffer.content (! error_buffer)));
     fun raise_error msg = error (trim_line (Buffer.content (Buffer.add msg (! error_buffer))));
 
     fun message {message = msg, hard, location = loc, context = _} =
       let
         val pos = Exn_Properties.position_of_polyml_location loc;
         val txt =
           (if hard then "ML error" else "ML warning") ^ Position.here pos ^ ":\n" ^
           Pretty.string_of (Pretty.from_polyml msg);
       in if hard then err txt else warn txt end;
 
 
     (* results *)
 
     val depth = FixedInt.fromInt (ML_Print_Depth.get_print_depth ());
 
     fun apply_result {fixes, types, signatures, structures, functors, values} =
       let
         fun display disp x =
           if depth > 0 then
             (write (disp x |> Pretty.from_polyml |> Pretty.string_of); write "\n")
           else ();
 
         fun apply_fix (a, b) =
           (#enterFix name_space (a, b);
             display PolyML.NameSpace.Infixes.print b);
         fun apply_type (a, b) =
           (#enterType name_space (a, b);
             display PolyML.NameSpace.TypeConstrs.print (b, depth, SOME name_space));
         fun apply_sig (a, b) =
           (#enterSig name_space (a, b);
             display PolyML.NameSpace.Signatures.print (b, depth, SOME name_space));
         fun apply_struct (a, b) =
           (#enterStruct name_space (a, b);
             display PolyML.NameSpace.Structures.print (b, depth, SOME name_space));
         fun apply_funct (a, b) =
           (#enterFunct name_space (a, b);
             display PolyML.NameSpace.Functors.print (b, depth, SOME name_space));
         fun apply_val (a, b) =
           (#enterVal name_space (a, b);
             display PolyML.NameSpace.Values.printWithType (b, depth, SOME name_space));
       in
         List.app apply_fix fixes;
         List.app apply_type types;
         List.app apply_sig signatures;
         List.app apply_struct structures;
         List.app apply_funct functors;
         List.app apply_val values
       end;
 
     exception STATIC_ERRORS of unit;
 
     fun result_fun (phase1, phase2) () =
      ((case phase1 of
         NONE => ()
       | SOME parse_tree =>
           add_breakpoints (report_parse_tree (#redirect flags) depth name_space parse_tree));
       (case phase2 of
         NONE => raise STATIC_ERRORS ()
       | SOME code =>
           apply_result
             ((code
               |> Runtime.debugging opt_context
               |> Runtime.toplevel_error (err o Runtime.exn_message)) ())));
 
 
     (* compiler invocation *)
 
     val parameters =
      [PolyML.Compiler.CPOutStream write,
       PolyML.Compiler.CPNameSpace name_space,
       PolyML.Compiler.CPErrorMessageProc message,
       PolyML.Compiler.CPLineNo (the_default 0 o Position.line_of o get_pos),
       PolyML.Compiler.CPLineOffset (the_default 0 o Position.offset_of o get_pos),
       PolyML.Compiler.CPFileName location_props,
       PolyML.Compiler.CPPrintDepth ML_Print_Depth.get_print_depth,
       PolyML.Compiler.CPCompilerResultFun result_fun,
       PolyML.Compiler.CPPrintInAlphabeticalOrder false,
       PolyML.Compiler.CPDebug debug,
       PolyML.Compiler.CPBindingSeq serial];
 
     val _ =
       (while not (List.null (! input_buffer)) do
         ML_Recursive.recursive env (fn () => PolyML.compiler (get, parameters) ()))
       handle exn =>
         if Exn.is_interrupt exn then Exn.reraise exn
         else
           let
             val exn_msg =
               (case exn of
                 STATIC_ERRORS () => ""
               | Runtime.TOPLEVEL_ERROR => ""
               | _ => "Exception- " ^ Pretty.string_of (Runtime.pretty_exn exn) ^ " raised");
             val _ = output_warnings ();
             val _ = output_writeln ();
           in raise_error exn_msg end;
   in
     if #verbose flags then (output_warnings (); flush_error (); output_writeln ())
     else ()
   end;
 
 end;