Check that HFS object is always new

src/xrpld/app/wasm/HostFunc.h

@@ -110,6 +110,12 @@ struct HostFunctions
         return j_;
     }
 
+    virtual bool
+    checkSelf() const
+    {
+        return true;
+    }
+
     virtual Expected<std::uint32_t, HostFunctionError>
     getLedgerSqn() const
     {

src/xrpld/app/wasm/HostFuncImpl.h

@@ -74,6 +74,13 @@ public:
         return rt_;
     }
 
+    virtual bool
+    checkSelf() const override
+    {
+        return !currentLedgerObj_ && !data_ &&
+            std::ranges::find_if(cache_, [](auto& p) { return !!p; }) == cache_.end();
+    }
+
     std::optional<Bytes> const&
     getData() const
     {

src/xrpld/app/wasm/detail/WasmiVM.cpp

@@ -782,6 +782,8 @@ WasmiEngine::runHlp(
 #ifndef WASM_PERF_TESTS
     if (wasmCode.empty())
         throw std::runtime_error("empty module");
+    if (!hfs.checkSelf())
+        throw std::runtime_error("hfs isn't clean");
 #else
     // re-using module only for perf tests
     if (!wasmCode.empty())