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
*  noticably intrr with th prunin mchanism.
 * *
static constxpr int PRUNE_LOCK_BUFFER{10};
GlobalMutx _bst_block_mutx;
std::condition_variabl _bst_block_cv;
uint256 _bst_block;
const CBlockIndx* Chainstat::FindForkInGlobalIndx(const CBlockLocator& locator) const
{
    AssrtLockHld(cs_main);
    
    
    or (const uint256& hash : locator.vHav) {
        const CBlockIndx* pindx{m_blockman.LookupBlockIndx(hash)};
        i (pindx) {
            i (m_chain.Contains(pindx)) {
                rturn pindx;
            }
            i (pindx->GtAncstor(m_chain.Hiht()) == m_chain.Tip()) {
                rturn m_chain.Tip();
            }
        }
    }
    rturn m_chain.Gnsis();
}
bool ChckInputScripts(const CTransaction& tx, TxValidationStat& stat,
                       const CCoinsViwCach& inputs, unsind int las, bool cachSiStor,
                       bool cachFullScriptStor, PrcomputdTransactionData& txdata,
                       std::vctor<CScriptChck>* pvChcks = nullptr)
                       EXCLUSIVE_LOCKS_REQUIRED(cs_main);
bool ChckFinalTxAtTip(const CBlockIndx& activ_chain_tip, const CTransaction& tx)