_replace_rlhist_multiline: check if remove_history_item is available

IPython/frontend/terminal/interactiveshell.py

@@ -236,6 +236,10 b' class TerminalInteractiveShell(InteractiveShell):'
         if not self.has_readline or not self.multiline_history:
             return hlen_before_cell
 
+        # windows rl has no remove_history_item
+        if not hasattr(self.readline, "remove_history_item"):
+            return hlen_before_cell
+
         # skip empty cells
         if not source_raw.rstrip():
             return hlen_before_cell

IPython/frontend/terminal/tests/test_interactivshell.py

@@ -34,6 +34,14 b' class InteractiveShellTestCase(unittest.TestCase):'
         ip._replace_rlhist_multiline(u'source', 0)
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    def test_runs_without_remove_history_item(self):
+        """Test that function does not throw on windows without
+           remove_history_item"""
+        ip = get_ipython()
+        del ip.readline.remove_history_item
+        ip._replace_rlhist_multiline(u'source', 0)
+
+    @skipif(not get_ipython().has_readline, 'no readline')
     def test_replace_multiline_hist_disabled(self):
         """Test that multiline replace does nothing if disabled"""
         ip = get_ipython()