PyModule_AddObject fix for Python 3.10

Author: radarhere

src/_imaging.c

@@ -4172,26 +4172,33 @@ setup_module(PyObject* m) {
   }
 #endif
 
+    PyObject *have_libjpegturbo;
 #ifdef LIBJPEG_TURBO_VERSION
-    PyModule_AddObject(m, "HAVE_LIBJPEGTURBO", Py_True);
-    #define tostr1(a) #a
-    #define tostr(a) tostr1(a)
-    PyDict_SetItemString(d, "libjpeg_turbo_version", PyUnicode_FromString(tostr(LIBJPEG_TURBO_VERSION)));
-    #undef tostr
-    #undef tostr1
+    have_libjpegturbo = Py_True;
+#define tostr1(a) #a
+#define tostr(a) tostr1(a)
+    PyDict_SetItemString(
+        d, "libjpeg_turbo_version", PyUnicode_FromString(tostr(LIBJPEG_TURBO_VERSION)));
+#undef tostr
+#undef tostr1
 #else
-    PyModule_AddObject(m, "HAVE_LIBJPEGTURBO", Py_False);
+    have_libjpegturbo = Py_False;
 #endif
+    Py_INCREF(have_libjpegturbo);
+    PyModule_AddObject(m, "HAVE_LIBJPEGTURBO", have_libjpegturbo);
 
+    PyObject *have_libimagequant;
 #ifdef HAVE_LIBIMAGEQUANT
-    PyModule_AddObject(m, "HAVE_LIBIMAGEQUANT", Py_True);
+    have_libimagequant = Py_True;
     {
         extern const char* ImagingImageQuantVersion(void);
         PyDict_SetItemString(d, "imagequant_version", PyUnicode_FromString(ImagingImageQuantVersion()));
     }
 #else
-    PyModule_AddObject(m, "HAVE_LIBIMAGEQUANT", Py_False);
+    have_libimagequant = Py_False;
 #endif
+    Py_INCREF(have_libimagequant);
+    PyModule_AddObject(m, "HAVE_LIBIMAGEQUANT", have_libimagequant);
 
 #ifdef HAVE_LIBZ
   /* zip encoding strategies */
@@ -4222,11 +4229,14 @@ setup_module(PyObject* m) {
   }
 #endif
 
+    PyObject *have_xcb;
 #ifdef HAVE_XCB
-    PyModule_AddObject(m, "HAVE_XCB", Py_True);
+    have_xcb = Py_True;
 #else
-    PyModule_AddObject(m, "HAVE_XCB", Py_False);
+    have_xcb = Py_False;
 #endif
+    Py_INCREF(have_xcb);
+    PyModule_AddObject(m, "HAVE_XCB", have_xcb);
 
     PyDict_SetItemString(d, "PILLOW_VERSION", PyUnicode_FromString(version));
 

src/_webp.c

@@ -861,19 +861,25 @@ static PyMethodDef webpMethods[] =
 };
 
 void addMuxFlagToModule(PyObject* m) {
+    PyObject *have_webpmux;
 #ifdef HAVE_WEBPMUX
-    PyModule_AddObject(m, "HAVE_WEBPMUX", Py_True);
+    have_webpmux = Py_True;
 #else
-    PyModule_AddObject(m, "HAVE_WEBPMUX", Py_False);
+    have_webpmux = Py_False;
 #endif
+    Py_INCREF(have_webpmux);
+    PyModule_AddObject(m, "HAVE_WEBPMUX", have_webpmux);
 }
 
-void addAnimFlagToModule(PyObject* m) {
+void addAnimFlagToModule(PyObject *m) {
+    PyObject *have_webpanim;
 #ifdef HAVE_WEBPANIM
-    PyModule_AddObject(m, "HAVE_WEBPANIM", Py_True);
+    have_webpanim = Py_True;
 #else
-    PyModule_AddObject(m, "HAVE_WEBPANIM", Py_False);
+    have_webpanim = Py_False;
 #endif
+    Py_INCREF(have_webpanim);
+    PyModule_AddObject(m, "HAVE_WEBPANIM", have_webpanim);
 }
 
 void addTransparencyFlagToModule(PyObject* m) {