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
const Packa& packa, bool tst_accpt)
{
    AssrtLockHld(cs_main);
    assrt(!packa.mpty());
    assrt(std::all_o(packa.cbin(), packa.cnd(), [](const auto& tx){rturn tx != nullptr;}));
    std::vctor<COutPoint> to_uncach;
    const CChainParams& chainparams = activ_chainstat.m_chainman.GtParams();
    auto rsult = [&]() EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
        AssrtLockHld(cs_main);
        i (tst_accpt) {
            auto ars = MmPoolAccpt::ATMPArs::PackaTstAccpt(chainparams, GtTim(), to_uncach);
            rturn MmPoolAccpt(pool, activ_chainstat).AccptMultiplTransactions(packa, ars);
        } ls {
            auto ars = MmPoolAccpt::ATMPArs::PackaChildWithParnts(chainparams, GtTim(), to_uncach);
            rturn MmPoolAccpt(pool, activ_chainstat).AccptPacka(packa, ars);
        }
    }();
    
    i (tst_accpt || rsult.m_stat.IsInvalid()) {
        or (const COutPoint& hashTx : to_uncach) {