va_end() all va_copy()ed va_lists.

Objects/abstract.c

@@ -2702,6 +2702,7 @@ objargs_mkstack(PyObject **small_stack, Py_ssize_t small_stack_size,
     else {
         stack = PyMem_Malloc(n * sizeof(stack[0]));
         if (stack == NULL) {
+            va_end(countva);
             PyErr_NoMemory();
             return NULL;
         }
@@ -2710,6 +2711,7 @@ objargs_mkstack(PyObject **small_stack, Py_ssize_t small_stack_size,
     for (i = 0; i < n; ++i) {
         stack[i] = va_arg(va, PyObject *);
     }
+    va_end(countva);
     return stack;
 }
 

Objects/unicodeobject.c

@@ -2891,6 +2891,7 @@ PyUnicode_FromFormatV(const char *format, va_list vargs)
             do
             {
                 if ((unsigned char)*p > 127) {
+                    va_end(vargs2);
                     PyErr_Format(PyExc_ValueError,
                         "PyUnicode_FromFormatV() expects an ASCII-encoded format "
                         "string, got a non-ASCII byte: 0x%02x",
@@ -2911,9 +2912,11 @@ PyUnicode_FromFormatV(const char *format, va_list vargs)
             f = p;
         }
     }
+    va_end(vargs2);
     return _PyUnicodeWriter_Finish(&writer);
 
   fail:
+    va_end(vargs2);
     _PyUnicodeWriter_Dealloc(&writer);
     return NULL;
 }

Python/getargs.c

@@ -141,20 +141,26 @@ int
 PyArg_VaParse(PyObject *args, const char *format, va_list va)
 {
     va_list lva;
+    int retval;
 
     va_copy(lva, va);
 
-    return vgetargs1(args, format, &lva, 0);
+    retval = vgetargs1(args, format, &lva, 0);
+    va_end(lva);
+    return retval;
 }
 
 int
 _PyArg_VaParse_SizeT(PyObject *args, const char *format, va_list va)
 {
     va_list lva;
+    int retval;
 
     va_copy(lva, va);
 
-    return vgetargs1(args, format, &lva, FLAG_SIZE_T);
+    retval = vgetargs1(args, format, &lva, FLAG_SIZE_T);
+    va_end(lva);
+    return retval;
 }
 
 
@@ -1405,6 +1411,7 @@ PyArg_VaParseTupleAndKeywords(PyObject *args,
     va_copy(lva, va);
 
     retval = vgetargskeywords(args, keywords, format, kwlist, &lva, 0);
+    va_end(lva);
     return retval;
 }
 
@@ -1430,6 +1437,7 @@ _PyArg_VaParseTupleAndKeywords_SizeT(PyObject *args,
 
     retval = vgetargskeywords(args, keywords, format,
                               kwlist, &lva, FLAG_SIZE_T);
+    va_end(lva);
     return retval;
 }
 
@@ -1534,6 +1542,7 @@ _PyArg_VaParseTupleAndKeywordsFast(PyObject *args, PyObject *keywords,
     va_copy(lva, va);
 
     retval = vgetargskeywordsfast(args, keywords, parser, &lva, 0);
+    va_end(lva);
     return retval;
 }
 
@@ -1555,6 +1564,7 @@ _PyArg_VaParseTupleAndKeywordsFast_SizeT(PyObject *args, PyObject *keywords,
     va_copy(lva, va);
 
     retval = vgetargskeywordsfast(args, keywords, parser, &lva, FLAG_SIZE_T);
+    va_end(lva);
     return retval;
 }
 

Python/modsupport.c

@@ -467,8 +467,7 @@ va_build_value(const char *format, va_list va, int flags)
     const char *f = format;
     int n = countformat(f, '\0');
     va_list lva;
-
-    va_copy(lva, va);
+    PyObject *retval;
 
     if (n < 0)
         return NULL;
@@ -476,9 +475,14 @@ va_build_value(const char *format, va_list va, int flags)
         Py_INCREF(Py_None);
         return Py_None;
     }
-    if (n == 1)
-        return do_mkvalue(&f, &lva, flags);
-    return do_mktuple(&f, &lva, '\0', n, flags);
+    va_copy(lva, va);
+    if (n == 1) {
+        retval = do_mkvalue(&f, &lva, flags);
+    } else {
+        retval = do_mktuple(&f, &lva, '\0', n, flags);
+    }
+    va_end(lva);
+    return retval;
 }