M PyShell.py

M RemoteDebugger.py
M rpc.py

Fix the incorrect shell exception tracebacks generated when running
under debugger control:

1. Use rpc.SocketIO.asynccall() instead of remotecall() to handle the
   IdbProxy.run() command.
2. Add a 'shell' attribute to RemoteDebugger.IdbProxy to allow setting
   of ModifiedInterpreter's active_seq attribute from RemoteDebugger code.
3. Cleanup PyShell.ModifiedInterpreter.runcode() and remove ambiguity
   regarding use of begin/endexecuting().
4. In runcode() and cleanup_traceback() use 'console' instead of 'file' to
   denote the entity to which the exception traceback is printed.
5. Enhance cleanup_traceback() so if the traceback is pruned entirely away
   (the error is in IDLE internals) it will be displayed in its entirety
   instead.
6. ModifiedInterpreter.runcode() now prints ERROR RPC returns to both
   console and __stderr__.
7. Make a small tweak to the rpc.py debug messages.

Lib/idlelib/PyShell.py

@@ -399,16 +399,16 @@ class ModifiedInterpreter(InteractiveInterpreter):
             self.tkconsole.resetoutput()
             self.active_seq = None
             how, what = response
-            file = self.tkconsole.console
+            console = self.tkconsole.console
             if how == "OK":
                 if what is not None:
-                    print >>file, `what`
+                    print >>console, `what`
             elif how == "EXCEPTION":
                 mod, name, args, tb = what
-                print >>file, 'Traceback (most recent call last):'
-                exclude = ("run.py", "rpc.py")
-                self.cleanup_traceback(tb, exclude)
-                traceback.print_list(tb, file=file)
+                print >>console, 'Traceback (most recent call last):'
+                exclude = ("run.py", "rpc.py", "RemoteDebugger.py", "bdb.py")
+                self.cleanup_traceback(tb, exclude, console)
+                traceback.print_list(tb, file=console)
                 # try to reinstantiate the exception, stuff in the args:
                 try:
                     etype = eval(mod + '.' + name)
@@ -419,18 +419,20 @@ class ModifiedInterpreter(InteractiveInterpreter):
                     val = args
                 lines = traceback.format_exception_only(etype, val)
                 for line in lines[:-1]:
-                    traceback._print(file, line, '')
-                traceback._print(file, lines[-1], '')
+                    traceback._print(console, line, '')
+                traceback._print(console, lines[-1], '')
                 if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
                     self.remote_stack_viewer()
             elif how == "ERROR":
                 errmsg = "PyShell.ModifiedInterpreter: Subprocess ERROR:\n"
                 print >>sys.__stderr__, errmsg, what
-                print >>file, errmsg, what
+                print >>console, errmsg, what
+            # we received a response to the currently active seq number:
             self.tkconsole.endexecuting()
 
-    def cleanup_traceback(self, tb, exclude):
+    def cleanup_traceback(self, tb, exclude, console):
         "Remove excluded traces from beginning/end of tb; get cached lines"
+        orig_tb = tb[:]
         while tb:
             for rpcfile in exclude:
                 if tb[0][0].count(rpcfile):
@@ -445,6 +447,11 @@ class ModifiedInterpreter(InteractiveInterpreter):
             else:
                 break
             del tb[-1]
+        if len(tb) == 0:
+            # error was in IDLE internals, don't prune!
+            tb[:] = orig_tb[:]
+            print>>sys.__stderr__, "** IDLE Internal Error: ", tb
+            print>>console, "** IDLE Internal Error **"
         for i in range(len(tb)):
             fn, ln, nm, line = tb[i]
             if nm == '?':
@@ -617,31 +624,26 @@ class ModifiedInterpreter(InteractiveInterpreter):
             warnings.filters[:] = self.save_warnings_filters
             self.save_warnings_filters = None
         debugger = self.debugger
-        if not debugger and self.rpcclt is not None:
-            self.tkconsole.beginexecuting()
-            self.active_seq = self.rpcclt.asynccall("exec", "runcode",
-                                                    (code,), {})
-            return
+        self.tkconsole.beginexecuting()
         try:
-            self.tkconsole.beginexecuting()
-            try:
-                if debugger:
-                    debugger.run(code, self.locals)
-                else:
-                    exec code in self.locals
-            except SystemExit:
-                if tkMessageBox.askyesno(
-                    "Exit?",
-                    "Do you want to exit altogether?",
-                    default="yes",
-                    master=self.tkconsole.text):
-                    raise
-                else:
-                    self.showtraceback()
-            except:
+            if not debugger and self.rpcclt is not None:
+                self.active_seq = self.rpcclt.asynccall("exec", "runcode",
+                                                        (code,), {})
+            elif debugger:
+                debugger.run(code, self.locals)
+            else:
+                exec code in self.locals
+        except SystemExit:
+            if tkMessageBox.askyesno(
+                "Exit?",
+                "Do you want to exit altogether?",
+                default="yes",
+                master=self.tkconsole.text):
+                raise
+            else:
                 self.showtraceback()
-        finally:
-            self.tkconsole.endexecuting()
+        except:
+            self.showtraceback()
 
     def write(self, s):
         "Override base class method"