Bug 2294 - Scripting: Crash on "Close" command

src/BatchCommands.cpp

@@ -364,6 +364,13 @@ MacroCommandsCatalog::MacroCommandsCatalog( const AudacityProject *project )
             // prefers slightly different parenthesis characters
             label.Join( XO("(%s)").Format( mNames[i].GET() ), wxT(" ") );
 
+         // Bug 2294.  The Close command pulls the rug out from under
+         // batch processing, because it destroys the project.
+         // So it is UNSAFE for scripting, and therefore excluded from
+         // the catalog.
+         if (mNames[i] == "Close")
+            continue;
+
          commands.push_back(
             {
                {

src/commands/BatchEvalCommand.cpp

@@ -50,6 +50,9 @@ bool BatchEvalCommand::Apply(const CommandContext & context)
    // Uh oh, I need to build a catalog, expensively
    // Maybe it can be built in one long-lived place and shared among command
    // objects instead?
+   // The catolog though may change during a session, as it includes the 
+   // names of macro commands - so the long-lived copy will need to 
+   // be refreshed after macros are added/deleted.
    MacroCommandsCatalog catalog(&context.project);
 
    wxString macroName = GetString(wxT("MacroName"));