commit 7bfb42d5b7721ca26e33050d025fec5c43c00058
author Victor Stinner <victor.stinner@gmail.com> Mon Dec 05 17:04:32 2016 +0100
committer Victor Stinner <victor.stinner@gmail.com> Mon Dec 05 17:04:32 2016 +0100
tree c1c91a2a34361474de2c02388c8f91d4333f2ea5
parent d77e5b7211e8daf22f2b3e0df124393bca504c38

Issue #28858: Remove _PyObject_CallArg1() macro

Replace
   _PyObject_CallArg1(func, arg)
with
   PyObject_CallFunctionObjArgs(func, arg, NULL)

Using the _PyObject_CallArg1() macro increases the usage of the C stack, which
was unexpected and unwanted. PyObject_CallFunctionObjArgs() doesn't have this
issue.

Modules/_elementtree.c

diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index 3837ff1..2e0cda7 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -2831,7 +2831,7 @@
     if (errmsg == NULL)
         return;
 
-    error = _PyObject_CallArg1(st->parseerror_obj, errmsg);
+    error = PyObject_CallFunctionObjArgs(st->parseerror_obj, errmsg, NULL);
     Py_DECREF(errmsg);
     if (!error)
         return;
@@ -2894,7 +2894,7 @@
                 (TreeBuilderObject*) self->target, value
                 );
         else if (self->handle_data)
-            res = _PyObject_CallArg1(self->handle_data, value);
+            res = PyObject_CallFunctionObjArgs(self->handle_data, value, NULL);
         else
             res = NULL;
         Py_XDECREF(res);
@@ -3004,7 +3004,7 @@
         /* shortcut */
         res = treebuilder_handle_data((TreeBuilderObject*) self->target, data);
     else if (self->handle_data)
-        res = _PyObject_CallArg1(self->handle_data, data);
+        res = PyObject_CallFunctionObjArgs(self->handle_data, data, NULL);
     else
         res = NULL;
 
@@ -3031,7 +3031,7 @@
     else if (self->handle_end) {
         tag = makeuniversal(self, tag_in);
         if (tag) {
-            res = _PyObject_CallArg1(self->handle_end, tag);
+            res = PyObject_CallFunctionObjArgs(self->handle_end, tag, NULL);
             Py_DECREF(tag);
         }
     }
@@ -3090,7 +3090,8 @@
     if (self->handle_comment) {
         comment = PyUnicode_DecodeUTF8(comment_in, strlen(comment_in), "strict");
         if (comment) {
-            res = _PyObject_CallArg1(self->handle_comment, comment);
+            res = PyObject_CallFunctionObjArgs(self->handle_comment,
+                                               comment, NULL);
             Py_XDECREF(res);
             Py_DECREF(comment);
         }