Issue #21124: Fix building _struct on Cygwin.
Patch by Masayuki Yamamoto.
diff --git a/Misc/NEWS b/Misc/NEWS
index 96a5c90..b7fc2ae 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -175,6 +175,10 @@
Build
-----
+- Issue #21124: Fix building the _struct module on Cygwin by passing ``NULL``
+ instead of ``&PyType_Type`` to PyVarObject_HEAD_INIT. Patch by Masayuki
+ Yamamoto.
+
- Issue #13756: Fix building extensions modules on Cygwin. Patch by Roumen
Petrov, based on original patch by Jason Tishler.
diff --git a/Modules/_struct.c b/Modules/_struct.c
index 796d168..9d48691 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -1650,7 +1650,7 @@
}
static PyTypeObject unpackiter_type = {
- PyVarObject_HEAD_INIT(&PyType_Type, 0)
+ PyVarObject_HEAD_INIT(NULL, 0)
"unpack_iterator", /* tp_name */
sizeof(unpackiterobject), /* tp_basicsize */
0, /* tp_itemsize */