commit df50cebbed06731512543de7fb96137ecb453ab2
author Martin v. Löwis <martin@v.loewis.de> Tue Mar 13 13:59:15 2012 -0700
committer Martin v. Löwis <martin@v.loewis.de> Tue Mar 13 13:59:15 2012 -0700
tree 7e3864b6f32d94dab3e66c9a875b391e19f4128a
parent 5c3c4242375998c1118f9724340a91ef28dd5368

Issue #3835: Refuse to use unthreaded Tcl in threaded Python.
Patch by Guilherme Polo and Andrew Svetlov.

Modules/_tkinter.c

diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index abbe0ec..94ae48d 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -613,6 +613,13 @@
     }
 #endif
 #ifdef WITH_THREAD
+    if (!(v->threaded)) {
+        PyErr_SetString(PyExc_RuntimeError,
+                        "Tcl/Tk was not compiled with --enable-threads but "
+                        "Python has threads enabled");
+        Py_DECREF(v);
+        return 0;
+    }
     if (v->threaded && tcl_lock) {
         /* If Tcl is threaded, we don't need the lock. */
         PyThread_free_lock(tcl_lock);