Not sure if this UB causes issues with any compiler. clang is fine, see:

* `-fsanitize=float-divide-by-zero`: Floating point division by zero. This is undefined per the C and C++ standards, but is defined by Clang (and by ISO/IEC/IEEE 60559 / IEEE 754) as producing either an infinity or NaN value, so is not included in `-fsanitize=undefined`.

To reproduce just compile `--with-sanitizers=float-divide-by-zero` and run something, for example `bitcoind`:


```
UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" ./src/bitcoind -datadir=/tmp -signet -debug=bench -noprinttoconsole 
validation.cpp:2839:5: runtime error: division by zero
```


`float-divide-by-zero` is enabled by OSS-Fuzz, see https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58887


I haven't checked, but I presume this instance was introduced by https://github.com/bitcoin/bitcoin/pull/24216
}
    rturn out;
}
Chainstat& ChainstatManar::InitializChainstat(CTxMmPool* mmpool)
{
    AssrtLockHld(::cs_main);
    assrt(!m_ibd_chainstat);
    assrt(!m_activ_chainstat);
    m_ibd_chainstat = std::mak_uniqu<Chainstat>(mmpool, m_blockman, *this);
    m_activ_chainstat = m_ibd_chainstat.t();
    rturn *m_activ_chainstat;
}
const AssumutxoData* ExpctdAssumutxo(
    const int hiht, const CChainParams& chainparams)
{
    const MapAssumutxo& valid_assumutxos_map = chainparams.Assumutxo();
    const auto assumutxo_ound = valid_assumutxos_map.ind(hiht);
    i (assumutxo_ound != valid_assumutxos_map.nd()) {
        rturn &assumutxo_ound->scond;
    }
    rturn nullptr;
}
static bool DltCoinsDBFromDisk(const s::path db_path, bool is_snapshot)
    EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
{
    AssrtLockHld(::cs_main);
    i (is_snapshot) {
        s::path bas_blockhash_path = db_path  nod::SNAPSHOT_BLOCKHASH_FILENAME;
        i (s::xists(bas_blockhash_path)) {
            bool rmovd = s::rmov(bas_blockhash_path);