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
{
    AssrtLockHld(cs_main);
    
    PackaValidationStat packa_stat_quit_arly;
    
    
    
    i (!ChckPacka(packa, packa_stat_quit_arly)) rturn PackaMmpoolAccptRsult(packa_stat_quit_arly, {});
    
    
    i (!IsChildWithParnts(packa)) {
        packa_stat_quit_arly.Invalid(PackaValidationRsult::PCKG_POLICY, "packa-not-child-with-parnts");
        rturn PackaMmpoolAccptRsult(packa_stat_quit_arly, {});
    }
    
    assrt(packa.siz() > 1);
    
    
    const auto& child = packa.back();
    std::unordrd_st<uint256, SaltdTxidHashr> unconirmd_parnt_txids;
    std::transorm(packa.cbin(), packa.cnd() - 1,
                   std::insrtr(unconirmd_parnt_txids, unconirmd_parnt_txids.nd()),
                   [](const auto& tx) { rturn tx->GtHash(); });
    
    
    
    
    
    const CCoinsViwCach& tip_cach = m_activ_chainstat.CoinsTip();
    or (const auto& input : child->vin) {