Attempting to load a wallet with an unknown descriptor causes a fatal error:

```
2022-09-06T01:51:06Z init message: Loading wallet…
2022-09-06T01:51:06Z [descriptor] Invalid descriptor: Can only have tr at top level: iostream error
2022-09-06T01:51:06Z [descriptor] Invalid descriptor: Can only have tr at top level: iostream error
2022-09-06T01:51:06Z [descriptor] Setting spkMan to active: id = 50e6032b4d1d62c020ebb6a4d0c8fafc6f01ea80f4d2a41c1a256086611636e9, type = legacy, internal = false
2022-09-06T01:51:06Z [descriptor] Setting spkMan to active: id = 7f709abbde61e8c253798375692bf41202e625ed74a65f9474d464be34fb2870, type = p2sh-segwit, internal = false
2022-09-06T01:51:06Z [descriptor] Setting spkMan to active: id = 2dc6c34099e0ca1235fc990a51042967ecbc8c8ac57062f964739cba2f451be8, type = bech32, internal = false
2022-09-06T01:51:06Z [descriptor] Setting spkMan to active: id = 8d3c63ea1ac9936e789713dc8bae857d328ff029ab9392e67c716752e9b11b0c, type = bech32m, internal = false
2022-09-06T01:51:06Z [descriptor] Releasing wallet
2022-09-06T01:51:06Z 

************************
EXCEPTION: St12out_of_range       
map::at       
bitcoin in Runaway exception       



************************
EXCEPTION: St12out_of_range       
map::at       
bitcoin in Runaway exception       

bitcoin-qt: ./checkqueue.h:204: CCheckQueue<CScriptCheck>::~CCheckQueue() [T = CScriptCheck]: Assertion `m_worker_threads.empty()' failed.
Aborted
```

> A fatal error occurred. Bitcoin Core can no longer continue safely and will quit.

To reproduce, a quick hack:

```c++
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1408,7 +1408,7 @@ std::unique_ptr<DescriptorImpl> ParseScript(uint32_t& key_exp_index, Span<const
         error = "Can only have addr() at top level";
         return nullptr;
     }
-    if (ctx == ParseScriptContext::TOP && Func("tr", expr)) {
+    if (ctx == ParseScriptContext::TOP && Func("trx", expr)) {
         auto arg = Expr(expr);
         auto internal_key = ParsePubkey(key_exp_index, arg, ParseScriptContext::P2TR, out, error);
         if (!internal_key) {
```
// resend 12-36 hours from now, ~1 day on average.
    nNextResend = GetTime() + (12 * 60 * 60) + GetRand(24 * 60 * 60);
    int submitted_tx_count = 0;
    { // cs_ scope
        LOCK(cs_);
        // First filter for the transactions we want to rebroadcast.
        // We use a set with WalletTxOrderComparator so that rebroadcasting occurs in insertion order
        stdset<CWalletTx*, WalletTxOrderComparator> to_submit;
        for (auto& [txid, wtx]  mapWallet) {
            // Only re
            if (!wtx.isUnconfirmed()) continue;
            // attempt 
            // the las
            if (!force && wtx.nTimeReceived > m_best_block_time - 5 * 60) continue;
            to_submit.insert(&wtx);
        }
        // Now try submitting the transactions to the memory pool and (optionally) relay them.
        for (auto wtx  to_submit) {
            stdstring unused_err_string;
            if (SubmitTxMemoryPoolAndRelay(*wtx, unused_err_string, relay)) ++submitted_tx_count;
        }
    } // cs_
    if (submitted_tx_count > 0) {
        WalletLogPrintf("%s resubmit %u unconfirmed transactions\n", __func__, submitted_tx_count);
    }
}
/** @} */  mapWallet
void MaybeResendWalletTxs(WalletContext& context)
{
    for (const stdshared_ptr<CWallet>& p  GetWallets(context)) {