Try to generate a stacktrace for runtime errors in consolidation

src/wallet/asyncrpcoperation_saplingconsolidation.cpp

@@ -16,6 +16,7 @@
 #include "util.h"
 #include "utilmoneystr.h"
 #include "wallet.h"
+#include <boost/stacktrace.hpp>
 
 CAmount fConsolidationTxFee = DEFAULT_CONSOLIDATION_FEE;
 bool fConsolidationMapUsed = false;
@@ -44,6 +45,11 @@ void AsyncRPCOperation_saplingconsolidation::main() {
         set_error_code(code);
         set_error_message(message);
     } catch (const runtime_error& e) {
+        const boost::stacktrace::stacktrace* st = boost::get_error_info<traced>(e);
+        if (st) {
+            std::cerr << *st << '\n';
+        }
+        set_error_code(-1);
         set_error_code(-1);
         set_error_message("runtime error: " + string(e.what()));
     } catch (const logic_error& e) {