add logging to fit exception to retain more info and find problem with #56; all references to current graph are either None or id, should close #57

src/gui_qt/main/management.py

@@ -110,7 +110,7 @@ class UpperManagement(QtCore.QObject):
         self.counter = 0
         self.data = OrderedDict()
         self.window = window
-        self.current_graph = ''
+        self.current_graph = None
         self.graphs = GraphDict(self.data)
         self.namespace = None
         self.undostack = QtWidgets.QUndoStack()
@@ -489,12 +489,14 @@ class UpperManagement(QtCore.QObject):
 
     @QtCore.pyqtSlot(list, bool)
     def end_fit(self, result: list, success: bool):
-        logger.info('FIT FINISHED')
         if success:
+            logger.info('Successful fit')
             self.fitFinished.emit(result)
         else:
+            e = result[0]
+            logger.exception(e, exc_info=True)
             QtWidgets.QMessageBox.warning(QtWidgets.QWidget(), 'Fit failed',
-                                          'Fit kaput with exception: \n' + "\n".join(result[0]))
+                                          f'Fit kaput with exception: \n\n{e!r}')
             self.fitFinished.emit([])
         self._fit_active = False
 
@@ -1213,6 +1215,6 @@ class FitWorker(QtCore.QObject):
             res = self.fitter.run(mode=self.mode)
             success = True
         except Exception as e:
-            res = [e.args]
+            res = [e]
             success = False
         self.finished.emit(res, success)