[New-bugs-announce] [issue40234] Disallow daemon threads in subinterpreters optionally.

[Eric Snow]

New submission from Eric Snow <ericsnowcurrently at gmail.com>:

In bpo-37266 we strictly disallowed creation of daemon threads in subinterpreters.  However, this is backward-incompatible for existing users of the subinterpreter C-API (such as mod-wsgi).

Rather than reverting that change I suggest that we make it opt-in through the interpreter config.  That would preserve backward-compatibility.  It would also make it so we can disallow daemon threads in subinterpreters created through PEP 554.  We could also deprecate use of daemon threads in *all* subinterpreters, with the goal of dropping support after a while.

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components: Interpreter Core
messages: 366029
nosy: eric.snow, grahamd, vstinner
priority: normal
severity: normal
stage: needs patch
status: open
title: Disallow daemon threads in subinterpreters optionally.
type: behavior
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40234>
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