Index: Modules/python.c
===================================================================
--- Modules/python.c	(revision 65930)
+++ Modules/python.c	(working copy)
@@ -40,7 +40,15 @@
 	oldloc = setlocale(LC_ALL, NULL);
 	setlocale(LC_ALL, "");
 	for (i = 0; i < argc; i++) {
+#ifdef __CYGWIN__
+		/* Cygwin has a broken implementation of mbstowcs which does 
+		 * not count the characters that would result from conversion.
+		 * Use an upper bound.
+		 */
+		size_t argsize = strlen(argv[i]);
+#else
 		size_t argsize = mbstowcs(NULL, argv[i], 0);
+#endif
 		if (argsize == (size_t)-1) {
 			fprintf(stderr, "Could not convert argument %d to string", i);
 			return 1;