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fixes Flow-IPC/ipc_shm#29

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Forgoing code review, because it is only pulling in submodule change(s) with their own PR(s).

…g/typo in SHM-classic `ipc::shm::classic::Pool_arena::construct()`, which also potentially affects other consumers of SHM-classic, directly or otherwise: sometimes the memory taken from a reserved SHM-pool in SHM-classic was a few bytes fewer than actually necessary, leading to unpredictable behavior for certain object sizes. / Fixed small bug wherein SHM-classic `ipc::shm::classic::Pool_arena` logged as-if from component TRANSPORT instead of the correct component SHM. / In SHM-classic `ipc::shm::classic::Pool_arena` a couple internal changes for small memory/perf improvements: the boost.ipc index is unnecessary and is now omitted; and avoid a certain heap allocation. / Minor. (Opportunistic.)>
@ygoldfeld ygoldfeld self-assigned this Apr 10, 2025
@ygoldfeld ygoldfeld merged commit 599ad04 into main Apr 11, 2025
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(SHM-classic) Sneaky, evil typo bug! Arena::construct<T>() might silently allocate just a few bytes fewer than needed.

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