Issue #17619: Make input() check for Ctrl-C correctly on Windows.

Misc/NEWS

@@ -12,6 +12,8 @@ What's New in Python 3.3.2?
 Core and Builtins
 -----------------
 
+- Issue #17619: Make input() check for Ctrl-C correctly on Windows.
+
 - Issue #17610: Don't rely on non-standard behavior of the C qsort() function.
 
 - Issue #17357: Add missing verbosity output when using -v/-vv.

Python/bltinmodule.c

@@ -1733,6 +1733,7 @@ builtin_input(PyObject *self, PyObject *args)
         }
         s = PyOS_Readline(stdin, stdout, prompt);
         if (s == NULL) {
+            PyErr_CheckSignals();
             if (!PyErr_Occurred())
                 PyErr_SetNone(PyExc_KeyboardInterrupt);
             goto _readline_errors;