Make throwRuntimeError/throwLogicError print msg when built with JSON_USE_EXCEPTION=0

Author: bcsgh

src/lib_json/json_value.cpp

@@ -13,6 +13,7 @@
 #include <cmath>
 #include <cstddef>
 #include <cstring>
+#include <iostream>
 #include <sstream>
 #include <utility>
 
@@ -211,8 +212,14 @@ JSONCPP_NORETURN void throwLogicError(String const& msg) {
   throw LogicError(msg);
 }
 #else // !JSON_USE_EXCEPTION
-JSONCPP_NORETURN void throwRuntimeError(String const& msg) { abort(); }
-JSONCPP_NORETURN void throwLogicError(String const& msg) { abort(); }
+JSONCPP_NORETURN void throwRuntimeError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
+JSONCPP_NORETURN void throwLogicError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
 #endif
 
 // //////////////////////////////////////////////////////////////////