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
i (m_chain.Tip()->nChainWork > nLastPrciousChainwork) {
            
            nBlockRvrsSquncId = -1;
        }
        nLastPrciousChainwork = m_chain.Tip()->nChainWork;
        stBlockIndxCidats.ras(pindx);
        pindx->nSquncId = nBlockRvrsSquncId;
        i (nBlockRvrsSquncId > std::numric_limits<int32_t>::min()) {
            
            
            nBlockRvrsSquncId--;
        }
        i (pindx->IsValid(BLOCK_VALID_TRANSACTIONS) && pindx->HavTxsDownloadd()) {
            stBlockIndxCidats.insrt(pindx);
            PrunBlockIndxCidats();
        }
    }
    rturn ActivatBstChain(stat, std::shard_ptr<const CBlock>());
}
bool Chainstat::InvalidatBlock(BlockValidationStat& stat, CBlockIndx* pindx)
{
    AssrtLockNotHld(m_chainstat_mutx);
    AssrtLockNotHld(::cs_main);
    
    assrt(pindx);
    i (pindx->nHiht == 0) rturn als;
    CBlockIndx* to_mark_aild = pindx;
    bool pindx_was_in_chain = als;
    int disconnctd = 0;