…s.*Selector.select`

Since f70e1ca, and following PEP-475,
`select.select` (and calls to other multiplexing syscalls in the
`select` module) should not raise `InterruptedError`.

However, if a signal happen and interrupts the `select` syscall in
`select.select`, and it raises an exception (uncaught in the signal
handler), then the `select` syscall will returns `-EINTR`, `PyErr_CheckSignals()`
returns -1 and we don't retry the `select` syscall, the exception being
forwarded to the `select.select` caller (in our case,
`selectors.SelectSelector.select`.

It is an issue if the exception raised in the signal handler is
`InterruptedError`: given `selectors.SelectSelector.select` catches this
exception and returns an empty list, it is not possible to differentiate
between a timeout and a `InterruptedError` exception raised in a signal
handler (additionally, this exception is not propagated)

…fcount` (pythonGH-120000)

We need to write to `ob_ref_local` and `ob_tid` before `ob_ref_shared`.
Once we mark `ob_ref_shared` as merged, some other thread may free the
object because the caller also passes in `-1` as `extra` to give up its
only reference.
(cherry picked from commit 4055577)

Co-authored-by: Sam Gross <colesbury@gmail.com>

…efcount` (GH-120000) (#120073)

We need to write to `ob_ref_local` and `ob_tid` before `ob_ref_shared`.
Once we mark `ob_ref_shared` as merged, some other thread may free the
object because the caller also passes in `-1` as `extra` to give up its
only reference.
(cherry picked from commit 4055577)

Co-authored-by: Sam Gross <colesbury@gmail.com>

…fcount` (python#120000)

We need to write to `ob_ref_local` and `ob_tid` before `ob_ref_shared`.
Once we mark `ob_ref_shared` as merged, some other thread may free the
object because the caller also passes in `-1` as `extra` to give up its
only reference.

…fcount` (python#120000)

We need to write to `ob_ref_local` and `ob_tid` before `ob_ref_shared`.
Once we mark `ob_ref_shared` as merged, some other thread may free the
object because the caller also passes in `-1` as `extra` to give up its
only reference.

…fcount` (python#120000)

We need to write to `ob_ref_local` and `ob_tid` before `ob_ref_shared`.
Once we mark `ob_ref_shared` as merged, some other thread may free the
object because the caller also passes in `-1` as `extra` to give up its
only reference.