improve error logs

Author: ckrause

src/evaluator.cpp

@@ -122,6 +122,9 @@ std::pair<status_t, steps_t> Evaluator::check(const Program &p,
         out = mem.get(Program::OUTPUT_CELL);
       }
     } catch (const std::exception &e) {
+      if (settings.print_as_b_file) {
+        std::cout << std::string(e.what()) << std::endl;
+      }
       result.first = ((int64_t)i >= num_terminating_terms) ? status_t::WARNING
                                                            : status_t::ERROR;
       return result;

src/interpreter.cpp

@@ -255,11 +255,11 @@ size_t Interpreter::run(const Program& p, Memory& mem, int64_t id) {
   }
   try {
     result = run(p, mem);
-  } catch (const std::exception& e) {
+  } catch (...) {
     if (id >= 0) {
       running_programs.erase(id);
     }
-    throw e;
+    std::rethrow_exception(std::current_exception());
   }
   if (id >= 0) {
     running_programs.erase(id);

src/main.cpp

@@ -140,8 +140,8 @@ int dispatch(Settings settings, const std::vector<std::string>& args) {
     Log::get().error("Option -s only allowed in evaluate command", true);
   }
   if (settings.print_as_b_file && cmd != "evaluate" && cmd != "eval" &&
-      cmd != "check") {
-    Log::get().error("Option -b only allowed in evaluate command", true);
+      cmd != "check" && cmd != "maintain") {
+    Log::get().error("Option -b not allowed for this command", true);
   }
   if (settings.parallel_mining && cmd != "mine") {
     Log::get().error("Option -p only allowed in mine command", true);