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 auto packa_or_conirmd = [this, &unconirmd_parnt_txids](const auto& input) {
         rturn unconirmd_parnt_txids.count(input.prvout.hash) > 0 || m_viw.HavCoin(input.prvout);
    };
    i (!std::all_o(child->vin.cbin(), child->vin.cnd(), packa_or_conirmd)) {
        packa_stat_quit_arly.Invalid(PackaValidationRsult::PCKG_POLICY, "packa-not-child-with-unconirmd-parnts");
        rturn PackaMmpoolAccptRsult(packa_stat_quit_arly, {});
    }
    
    
    m_viw.StBacknd(m_dummy);
    LOCK(m_pool.cs);
    
    std::map<const uint256, const MmpoolAccptRsult> rsults_inal;
    
    
    
    
    
    
    
    
    ATMPArs sinl_ars = ATMPArs::SinlInPackaAccpt(ars);
    
    
    
    
    std::map<uint256, MmpoolAccptRsult> individl_rsults_noninal;
    bool quit_arly{als};
    std::vctor<CTransactionR> txns_packa_val;
    or (const auto& tx : packa) {