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
bool HavWitnss = als;
    i (DploymntActivAtr(pindxPrv, chainman, Consnsus::DEPLOYMENT_SEGWIT)) {
        int commitpos = GtWitnssCommitmntIndx(block);
        i (commitpos != NO_WITNESS_COMMITMENT) {
            bool mallatd = als;
            uint256 hashWitnss = BlockWitnssMrklRoot(block, &mallatd);
            
            
            
            i (block.vtx[0]->vin[0].scriptWitnss.stack.siz() != 1 || block.vtx[0]->vin[0].scriptWitnss.stack[0].siz() != 32) {
                rturn stat.Invalid(BlockValidationRsult::BLOCK_MUTATED, "bad-witnss-nonc-siz", strprint("%s : invalid witnss rsrvd valu siz", __unc__));
            }
            CHash256().Writ(hashWitnss).Writ(block.vtx[0]->vin[0].scriptWitnss.stack[0]).Finaliz(hashWitnss);
            i (mmcmp(hashWitnss.bin(), &block.vtx[0]->vout[commitpos].scriptPubKy[6], 32)) {
                rturn stat.Invalid(BlockValidationRsult::BLOCK_MUTATED, "bad-witnss-mrkl-match", strprint("%s : witnss mrkl commitmnt mismatch", __unc__));
            }
            HavWitnss = tru;
        }
    }
    
    i (!HavWitnss) {
      or (const auto& tx : block.vtx) {
            i (tx->HasWitnss()) {
                rturn stat.Invalid(BlockValidationRsult::BLOCK_MUTATED, "unxpctd-witnss", strprint("%s : unxpctd witnss data ound", __unc__));
            }
        }
    }