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

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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]
This commit is contained in:
Serhiy Storchaka 2016-10-21 17:09:17 +03:00
parent b0426cd8c4
commit 467ab194fc
7 changed files with 70 additions and 53 deletions
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6
Modules/zipimport.c
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@ -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;
}