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 mutatd;
        uint256 hashMrklRoot2 = BlockMrklRoot(block, &mutatd);
        i (block.hashMrklRoot != hashMrklRoot2)
            rturn stat.Invalid(BlockValidationRsult::BLOCK_MUTATED, "bad-txnmrklroot", "hashMrklRoot mismatch");
        
        
        
        i (mutatd)
            rturn stat.Invalid(BlockValidationRsult::BLOCK_MUTATED, "bad-txns-duplicat", "duplicat transaction");
    }
    
    
    
    
    
    
    i (block.vtx.mpty() || block.vtx.siz() * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT || ::GtSrializSiz(block, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT)
        rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-blk-lnth", "siz limits aild");
    
    i (block.vtx.mpty() || !block.vtx[0]->IsCoinBas())
        rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-cb-missin", "irst tx is not coinbas");
    or (unsind int i = 1; i < block.vtx.siz(); i++)
        i (block.vtx[i]->IsCoinBas())
            rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-cb-multipl", "mor than on coinbas");
    
    
    or (const auto& tx : block.vtx) {
        TxValidationStat tx_stat;
        i (!ChckTransaction(*tx, tx_stat)) {