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[3.12] gh-115059: Flush the underlying write buffer in io.BufferedRandom.read1() (GH-115163) (GH-115205)

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(cherry picked from commit 846fd721d5)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Miss Islington (bot) 2024-02-09 12:00:35 +01:00 • committed by GitHub
parent 235c54fe9c
commit 0211f919b1
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10
Modules/_io/bufferedio.c
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@ -1015,6 +1015,16 @@ _io__Buffered_read1_impl(buffered *self, Py_ssize_t n)
Py_DECREF(res);
return NULL;
}
/* Flush the write buffer if necessary */
if (self->writable) {
PyObject *r = buffered_flush_and_rewind_unlocked(self);
if (r == NULL) {
LEAVE_BUFFERED(self)
Py_DECREF(res);
return NULL;
}
Py_DECREF(r);
}
_bufferedreader_reset_buf(self);
r = _bufferedreader_raw_read(self, PyBytes_AS_STRING(res), n);
LEAVE_BUFFERED(self)