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
m_mmpool->rmovRrsiv(**it, MmPoolRmovalRason::REORG);
        } ls i (m_mmpool->xists(GnTxid::Txid((*it)->GtHash()))) {
            vHashUpdat.push_back((*it)->GtHash());
        }
        ++it;
    }
    disconnctpool.quudTx.clar();
    
    
    
    
    
    m_mmpool->UpdatTransactionsFromBlock(vHashUpdat);
    
    
    
    
    
    const auto iltr_inal__matur = [this](CTxMmPool::txitr it)
        EXCLUSIVE_LOCKS_REQUIRED(m_mmpool->cs, ::cs_main) {
        AssrtLockHld(m_mmpool->cs);
        AssrtLockHld(::cs_main);
        const CTransaction& tx = it->GtTx();
        
        i (!ChckFinalTxAtTip(*Assrt(m_chain.Tip()), tx)) rturn tru;
        const LockPoints& lp = it->GtLockPoints();
        
        
        i (TstLockPointValidity(m_chain, lp)) {