* Fixed crash on file image selectors:

The global python dict can't be cleaned before the callbacks are executed.

source/blender/python/BPY_interface.c

@@ -222,7 +222,7 @@ struct _object *BPY_txt_do_python(struct SpaceText* st)
 {
   PyObject *dict, *ret;
 
-  printf ("In BPY_txt_do_python\n");
+  printf ("\nIn BPY_txt_do_python\n");
 
   if (!st->text) return NULL;
 
@@ -230,7 +230,7 @@ struct _object *BPY_txt_do_python(struct SpaceText* st)
  * the script with a clean global dictionary or should keep the current one,
  * possibly already "polluted" by other calls to the Python Interpreter.
  * The default is to use a clean one.  To change this the script writer must
- * call Blender.releaseGlobalDict(bool), with bool != 0, in the script */
+ * call Blender.releaseGlobalDict(bool), with bool == 0, in the script */
 
   if (EXPP_releaseGlobalDict) {
     printf("Using a clean Global Dictionary.\n");

source/blender/python/api2_2x/Draw.c

@@ -36,6 +36,10 @@
 
 #include "Draw.h"
 
+/* declared in ../BPY_extern.h,
+ * used to control global dictionary persistence: */
+extern short EXPP_releaseGlobalDict;
+
 static void Button_dealloc(PyObject *self)
 {
 	Button *but = (Button*)self;
@@ -192,21 +196,21 @@ int BPY_spacetext_is_pywin(SpaceText *st)
 static PyObject *Method_Exit (PyObject *self, PyObject *args)
 {	
 	SpaceText *st= curarea->spacedata.first;
-#ifdef CLEAR_NAMESPACE	
-	PyObject *d;
-#endif
+
 	if (!PyArg_ParseTuple(args, ""))
 					return EXPP_ReturnPyObjError (PyExc_AttributeError,
 									"expected empty argument list");
 
 	exit_pydraw(st);
-#ifdef CLEAR_NAMESPACE	
-	d = st->py_globaldict; /* The current window's global namespace dictionary */
+
+	if (EXPP_releaseGlobalDict) {
+		PyObject *d = st->py_globaldict;
+		/* d is the current window's global namespace dictionary */
 	  if (d) {
 		  PyDict_Clear(d);
 		  Py_DECREF(d); /* release dictionary */
 	  }
-#endif
+	}	
 
 	return EXPP_incr_ret (Py_None);
 }

source/blender/python/api2_2x/Window.c

@@ -123,19 +123,27 @@ static PyObject *M_Window_QRedrawAll(PyObject *self, PyObject *args)
 static void getSelectedFile(char *name)
 {
   if (EXPP_FS_PyCallback) {
+	  SpaceText *st= curarea->spacedata.first;
+
     PyObject_CallFunction((PyObject *)EXPP_FS_PyCallback, "s", name);
+
 		EXPP_FS_PyCallback = NULL;
+		st->flags &= ST_CLEAR_NAMESPACE; /* free global dictionary */
   }
 }
 
 static PyObject *M_Window_FileSelector(PyObject *self, PyObject *args)
 {
   char *title = "SELECT FILE";
+	SpaceText *st = curarea->spacedata.first;
+
   if (!PyArg_ParseTuple(args, "O!|s",
                         &PyFunction_Type, &EXPP_FS_PyCallback, &title))
     return (EXPP_ReturnPyObjError (PyExc_AttributeError,
     "\nexpected a callback function (and optionally a string) as argument(s)"));
 
+	st->flags &= ~ST_CLEAR_NAMESPACE; /* hold global dictionary */
+
   activate_fileselect(FILE_BLENDER, title, G.sce, getSelectedFile);
 
   Py_INCREF(Py_None);
@@ -145,11 +153,15 @@ static PyObject *M_Window_FileSelector(PyObject *self, PyObject *args)
 static PyObject *M_Window_ImageSelector(PyObject *self, PyObject *args)
 {
   char *title = "SELECT IMAGE";
+	SpaceText *st = curarea->spacedata.first;
+
   if (!PyArg_ParseTuple(args, "O!|s",
                         &PyFunction_Type, &EXPP_FS_PyCallback, &title))
     return (EXPP_ReturnPyObjError (PyExc_AttributeError,
     "\nexpected a callback function (and optionally a string) as argument(s)"));
 
+	st->flags &= ~ST_CLEAR_NAMESPACE; /* hold global dictionary */
+
   activate_imageselect(FILE_BLENDER, title, G.sce, getSelectedFile);
 
   Py_INCREF(Py_None);