explicitly close figures in clean_up_and_exit instead of using an atexit function * graphics.cc (Fdrawnow): Don't register __go_close_all__ as an atexit function. * __go_close_all__.m: Delete. * plot/module.mk (plot_FCN_FILES): Remove __go_close_all__.m from the list. * graphics.cc (gh_manager::create_instance): Do register cleanup function. * graphics.cc (delete_graphics_objects, delete_graphics_object, close_figure, force_close_figure): New functions. (F__go_delete__): Call delete_graphics_objects to do the work. * graphics.h, graphics.cc (gh_manager::close_all_figures, gh_manager::do_close_all_figures): New functions. * graphics.h.in, graphics.cc (close_all_figures): New function. * toplev.cc (clean_up_and_exit): Call close_all_figures. * graphics.h.in (uitoggletool::~uitoggletool, uipushtool::~uipushtool, uitoolbar::~uitoolbar, uipanel::~uipanel, uicontrol::~uicontrol, uicontextmenu::~uicontextmenu, uimenu::~uimenu, hggroup::~hggroup, surface::~surface, image::~image, text::~text, line::~line, axes::~axes, figure::~figure, root_figure::~root_figure): Don't delete children. * toplev.cc (SAFE_CALL, IGNORE_INTERRUPT): Rename to OCTAVE_SAFE_CALL and OCTAVE_IGNORE_INTERRUPT and move to toplev.h. Temporarily set Vdebug_on_error and Vdebug_on_warning. Reset error_state to zero. Change all callers. * graphics.h.in (base_graphics_toolkit::close): New virtual function. (graphics_toolkit::close, graphics_toolkit::close_all_toolkits): New functions. * graphics.cc (gnuplot_toolkit::close): New function. ): * __init_fltk__.cc (F__init_fltk__): Don't register __remove_fltk__ as an atexit function. (F__remove_fltk__): Move to fltk_toolkit::close.

--- a/src/toplev.h	Thu Dec 08 00:52:39 2011 -0500
+++ b/src/toplev.h	Thu Dec 08 06:28:18 2011 -0500
@@ -418,4 +418,38 @@
   void do_backtrace_error_message (void) const;
 };
 
+// Call a function with exceptions handled to avoid problems with
+// errors while shutting down.
+
+#define OCTAVE_IGNORE_EXCEPTION(E) \
+  catch (E) \
+    { \
+      std::cerr << "error: ignoring " #E " while preparing to exit" << std::endl; \
+      recover_from_exception (); \
+    }
+
+#define OCTAVE_SAFE_CALL(F, ARGS) \
+  do \
+    { \
+      try \
+        { \
+          unwind_protect frame; \
+ \
+          frame.protect_var (Vdebug_on_error); \
+          frame.protect_var (Vdebug_on_warning); \
+ \
+          Vdebug_on_error = false; \
+          Vdebug_on_warning = false; \
+ \
+          F ARGS; \
+        } \
+      OCTAVE_IGNORE_EXCEPTION (octave_interrupt_exception) \
+      OCTAVE_IGNORE_EXCEPTION (octave_execution_exception) \
+      OCTAVE_IGNORE_EXCEPTION (std::bad_alloc) \
+ \
+      if (error_state) \
+        error_state = 0; \
+    } \
+  while (0)
+
 #endif