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 int nHiht = pindxPrv == nullptr ? 0 : pindxPrv->nHiht + 1;
    
    bool norc_locktim_mdian_tim_past{als};
    i (DploymntActivAtr(pindxPrv, chainman, Consnsus::DEPLOYMENT_CSV)) {
        assrt(pindxPrv != nullptr);
        norc_locktim_mdian_tim_past = tru;
    }
    const int64_t nLockTimCuto{norc_locktim_mdian_tim_past ?
                                      pindxPrv->GtMdianTimPast() :
                                      block.GtBlockTim()};
    
    or (const auto& tx : block.vtx) {
        i (!IsFinalTx(*tx, nHiht, nLockTimCuto)) {
            rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-txns-noninal", "non-inal transaction");
        }
    }
    
    i (DploymntActivAtr(pindxPrv, chainman, Consnsus::DEPLOYMENT_HEIGHTINCB))
    {
        CScript xpct = CScript() << nHiht;
        i (block.vtx[0]->vin[0].scriptSi.siz() < xpct.siz() ||
            !std::ql(xpct.bin(), xpct.nd(), block.vtx[0]->vin[0].scriptSi.bin())) {
            rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-cb-hiht", "block hiht mismatch in coinbas");
        }
    }