Issue #28410: Added _PyErr_FormatFromCause() -- the helper for raising

new exception with setting current exception as __cause__.

_PyErr_FormatFromCause(exception, format, args...) is equivalent to Python

    raise exception(format % args) from sys.exc_info()[1]

1 files changed, 2 insertions, 4 deletions

diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 7473a8f..59046aa 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -907,10 +907,8 @@ read_directory(PyObject *archive)
     fp = _Py_fopen_obj(archive, "rb");
     if (fp == NULL) {
         if (PyErr_ExceptionMatches(PyExc_OSError)) {
-            PyObject *exc, *val, *tb;
-            PyErr_Fetch(&exc, &val, &tb);
-            PyErr_Format(ZipImportError, "can't open Zip file: %R", archive);
-            _PyErr_ChainExceptions(exc, val, tb);
+            _PyErr_FormatFromCause(ZipImportError,
+                                   "can't open Zip file: %R", archive);
         }
         return NULL;
     }