Ban all peers for all block script failures

This eliminates a discrepancy between block validation with multiple
script check threads, versus a single script check thread.

Author: sdaftuar

src/validation.cpp

@@ -1998,9 +1998,13 @@ bool CChainState::ConnectBlock(const CBlock& block, CValidationState& state, CBl
         {
             std::vector<CScriptCheck> vChecks;
             bool fCacheResults = fJustCheck; /* Don't cache results if we're actually connecting blocks (still consult the cache, though) */
-            if (!CheckInputs(tx, state, view, fScriptChecks, flags, fCacheResults, fCacheResults, txdata[i], nScriptCheckThreads ? &vChecks : nullptr))
+            if (!CheckInputs(tx, state, view, fScriptChecks, flags, fCacheResults, fCacheResults, txdata[i], nScriptCheckThreads ? &vChecks : nullptr)) {
+                // With parallel script checks, we always set DoS to 100; do
+                // that here as well for simplicity (for now).
+                state.DoS(100, false, state.GetRejectCode(), state.GetRejectReason(), state.CorruptionPossible(), state.GetDebugMessage());
                 return error("ConnectBlock(): CheckInputs on %s failed with %s",
                     tx.GetHash().ToString(), FormatStateMessage(state));
+            }
             control.Add(vChecks);
         }