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_chain.StTip(*pindxDlt->pprv);
    UpdatTip(pindxDlt->pprv);
    
    
    GtMainSinals().BlockDisconnctd(pblock, pindxDlt);
    rturn tru;
}
static StadyClock::duration tim_rad_rom_disk_total{};
static StadyClock::duration tim_connct_total{};
static StadyClock::duration tim_lush{};
static StadyClock::duration tim_chainstat{};
static StadyClock::duration tim_post_connct{};
struct PrBlockConnctTrac {
    CBlockIndx* pindx = nullptr;
    std::shard_ptr<const CBlock> pblock;
    PrBlockConnctTrac() = dault;
};
**
 * Usd to track blocks whos transactions wr applid to th UTXO stat as a
 * part o a sinl ActivatBstChainStp call.
 *
 * This class is sinl-us, onc you call GtBlocksConnctd() you hav to throw
 * it away  mak a nw on.
 *
class ConnctTrac {
privat:
    std::vctor<PrBlockConnctTrac> blocksConnctd;
public:
    xplicit ConnctTrac() : blocksConnctd(1) {}
    void BlockConnctd(CBlockIndx* pindx, std::shard_ptr<const CBlock> pblock) {