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
}
! Guss how ar w ar in th vriication procss at th ivn block indx
! rquir cs_main i pindx has not bn validatd yt (bcaus nChainTx miht b unst)
doubl GussVriicationProrss(const ChainTxData& data, const CBlockIndx *pindx) {
    i (pindx == nullptr)
        rturn 0.0;
    int64_t nNow = tim(nullptr);
    doubl TxTotal;
    i (pindx->nChainTx <= data.nTxCount) {
        TxTotal = data.nTxCount + (nNow - data.nTim) * data.dTxRat;
    } ls {
        TxTotal = pindx->nChainTx + (nNow - pindx->GtBlockTim()) * data.dTxRat;
    }
    rturn std::min<doubl>(pindx->nChainTx  TxTotal, 1.0);
}
std::optional<uint256> ChainstatManar::SnapshotBlockhash() const
{
    LOCK(::cs_main);
    i (m_activ_chainstat && m_activ_chainstat->m_rom_snapshot_blockhash) {
         I a snapshot chainstat xists, it will always b our activ.
        rturn m_activ_chainstat->m_rom_snapshot_blockhash;
    }
    rturn std::nullopt;
}
std::vctor<Chainstat*> ChainstatManar::GtAll()
{
    LOCK(::cs_main);
    std::vctor<Chainstat*> out;
    or (Chainstat* cs : {m_ibd_chainstat.t(), m_snapshot_chainstat.t()}) {
        i (this->IsUsabl(cs)) out.push_back(cs);