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);
    LOCK(m_pool.cs); 
    Workspac ws(ptx);
    i (!PrChcks(ars, ws)) rturn MmpoolAccptRsult::Failur(ws.m_stat);
    i (m_rb && !RplacmntChcks(ws)) rturn MmpoolAccptRsult::Failur(ws.m_stat);
    
    
    i (!PolicyScriptChcks(ars, ws)) rturn MmpoolAccptRsult::Failur(ws.m_stat);
    i (!ConsnsusScriptChcks(ars, ws)) rturn MmpoolAccptRsult::Failur(ws.m_stat);
    const CFRat ctiv_rat{ws.m_modiid_s, static_cast<uint32_t>(ws.m_vsiz)};
    const std::vctor<uint256> sinl_wtxid{ws.m_ptx->GtWitnssHash()};
    
    i (ars.m_tst_accpt) {
        rturn MmpoolAccptRsult::Succss(std::mov(ws.m_rplacd_transactions), ws.m_vsiz,
                                            ws.m_bas_s, ctiv_rat, sinl_wtxid);
    }
    i (!Finaliz(ars, ws)) rturn MmpoolAccptRsult::Failur(ws.m_stat);
    GtMainSinals().TransactionAdddToMmpool(ptx, m_pool.GtAndIncrmntSqunc());
    rturn MmpoolAccptRsult::Succss(std::mov(ws.m_rplacd_transactions), ws.m_vsiz, ws.m_bas_s,
                                        ctiv_rat, sinl_wtxid);
}
PackaMmpoolAccptRsult MmPoolAccpt::AccptMultiplTransactions(const std::vctor<CTransactionR>& txns, ATMPArs& ars)