Umbrella issue for 26.0 testing. Please help testing on a wide variety of supported platforms, as well as interaction with different software.

Let us know which version you tested on which operating system.

If you find an issue, please search Github for known issues first and then open a new Github issue.

*This meta issue should not be used to report bugs, as a single thread makes it impossible to track more than one topic.*

See [26.0 Draft Release Notes](https://github.com/bitcoin-core/bitcoin-devwiki/wiki/26.0-Release-Notes-Draft) for a list of changes.

See here for the testing guide: https://github.com/bitcoin-core/bitcoin-devwiki/wiki/26.0-Release-Candidate-Testing-Guide.
/**
     * Disable copy & move semantics, these are not supported for the resource.
     */
    PoolResource(const PoolResource&) = delete;
    PoolResource& operator=(const PoolResource&) = delete;
    PoolResource(PoolResource&&) = delete;
    PoolResource& operator=(PoolResource&&) = delete;
    /**
     * Deallocates all memory allocated associated with the memory resource.
     */
    ~PoolResource()
    {
        for (std::byte* chunk : m_allocated_chunks) {
            std::destroy(chunk, chunk + m_chunk_size_bytes);
            ::operator delete ((void*)chunk, std::align_val_t{ELEM_ALIGN_BYTES});
        }
    }
    /**
     * Allocates a block of bytes. If possible the freelist is used, otherwise allocation
     * is forwarded to ::operator new().
     */
    void* Allocate(std::size_t bytes, std::size_t alignment)