diff -r 91bafdf7d7a4 Modules/main.c
--- a/Modules/main.c	Thu Mar 29 06:49:29 2012 -0400
+++ b/Modules/main.c	Thu Mar 29 13:40:05 2012 +0200
@@ -171,17 +171,20 @@ static int RunModule(wchar_t *modname, i
     runpy = PyImport_ImportModule("runpy");
     if (runpy == NULL) {
         fprintf(stderr, "Could not import runpy module\n");
+        PyErr_Print();
         return -1;
     }
     runmodule = PyObject_GetAttrString(runpy, "_run_module_as_main");
     if (runmodule == NULL) {
         fprintf(stderr, "Could not access runpy._run_module_as_main\n");
+        PyErr_Print();
         Py_DECREF(runpy);
         return -1;
     }
     module = PyUnicode_FromWideChar(modname, wcslen(modname));
     if (module == NULL) {
         fprintf(stderr, "Could not convert module name to unicode\n");
+        PyErr_Print();
         Py_DECREF(runpy);
         Py_DECREF(runmodule);
         return -1;
@@ -190,6 +193,7 @@ static int RunModule(wchar_t *modname, i
     if (runargs == NULL) {
         fprintf(stderr,
             "Could not create arguments for runpy._run_module_as_main\n");
+        PyErr_Print();
         Py_DECREF(runpy);
         Py_DECREF(runmodule);
         Py_DECREF(module);