Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
file with `str' filename on Windows.
diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index ca12822..2dc3d74 100644
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -265,10 +265,11 @@
Py_END_ALLOW_THREADS
if (self->fd < 0) {
#ifdef MS_WINDOWS
- PyErr_SetFromErrnoWithUnicodeFilename(PyExc_IOError, widename);
-#else
- PyErr_SetFromErrnoWithFilename(PyExc_IOError, name);
+ if (widename != NULL)
+ PyErr_SetFromErrnoWithUnicodeFilename(PyExc_IOError, widename);
+ else
#endif
+ PyErr_SetFromErrnoWithFilename(PyExc_IOError, name);
goto error;
}
if(dircheck(self, name) < 0)