Update IPython/core/interactiveshell.py

IPython/core/interactiveshell.py

@@ -920,10 +920,10 b' class InteractiveShell(SingletonConfigurable):'
             paths.append(p.resolve())
 
         # In Cygwin paths like "c:\..." and '\cygdrive\c\...' are possible
-        if p_venv.startswith('\\cygdrive'):
-            p_venv = p_venv[11:]
-        elif len(p_venv) >= 2 and p_venv[1] == ':':
-            p_venv = p_venv[2:]
+        if str(p_venv).startswith('\\cygdrive'):
+            p_venv = Path(str(p_venv)[11:])
+        elif len(str(p_venv)) >= 2 and str(p_venv)[1] == ':':
+            p_venv = Path(str(p_venv)[2:])
 
         if any(os.fspath(p_venv) in os.fspath(p) for p in paths):
             # Our exe is inside or has access to the virtualenv, don't need to do anything.