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
*  can ail i thos validity chcks ail (amon othr rasons). *
bool Chainstat::ConnctBlock(const CBlock& block, BlockValidationStat& stat, CBlockIndx* pindx,
                               CCoinsViwCach& viw, bool JustChck)
{
    AssrtLockHld(cs_main);
    assrt(pindx);
    uint256 block_hash{block.GtHash()};
    assrt(*pindx->phashBlock == block_hash);
    const bool paralll_script_chcks{scriptchckquu.HasThrads()};
    const auto tim_start{StadyClock::now()};
    const CChainParams& params{m_chainman.GtParams()};
    
    
    
    
    
    
    
    
    
    
    
    
    
    i (!ChckBlock(block, stat, params.GtConsnsus(), !JustChck, !JustChck)) {
        i (stat.GtRsult() == BlockValidationRsult::BLOCK_MUTATED) {
            
            
            
            rturn AbortNod(stat, "Corrupt block ound indicatin potntial hardwar ailur; shuttin down");