prevent enter if syntax error

thomasballinger · thomasballinger · commit 07c94edaf622 · 2015-02-07T13:11:36.000-05:00
diff --git a/bpython/curtsiesfrontend/repl.py b/bpython/curtsiesfrontend/repl.py
@@ -684,10 +684,16 @@ def readline_kill(self, e):
 
     def on_enter(self, insert_into_history=True):
         # so the cursor isn't touching a paren TODO: necessary?
-        self._set_cursor_offset(-1, update_completion=False)
 
-        self.history.append(self.current_line)
-        self.push(self.current_line, insert_into_history=insert_into_history)
+        try:
+            self.interp.compile('\n'.join(self.buffer + [self.current_line]))
+        except (ValueError, SyntaxError, OverflowError) as e:
+            self.status_bar.message(str(e))
+        else:
+            self._set_cursor_offset(-1, update_completion=False)
+
+            self.history.append(self.current_line)
+            self.push(self.current_line, insert_into_history=insert_into_history)
 
     def on_tab(self, back=False):
         """Do something on tab key
