Handle localtime errors

components/misc/timeconvert.hpp

@@ -1,8 +1,15 @@
 #ifndef OPENMW_COMPONENTS_MISC_TIMECONVERT_H
 #define OPENMW_COMPONENTS_MISC_TIMECONVERT_H
 
+#include <cerrno>
 #include <chrono>
+#include <cstring>
+#include <ctime>
+#include <filesystem>
+#include <iomanip>
 #include <sstream>
+#include <string>
+#include <system_error>
 
 namespace Misc
 {
@@ -22,9 +29,11 @@ namespace Misc
     {
         tm time_info{};
 #ifdef _WIN32
-        (void)localtime_s(&time_info, &tp);
+        if (const errno_t error = localtime_s(&time_info, &tp); error != 0)
+            throw std::system_error(error, std::generic_category());
 #else
-        (void)localtime_r(&tp, &time_info);
+        if (localtime_r(&tp, &time_info) == nullptr)
+            throw std::system_error(errno, std::generic_category());
 #endif
         std::stringstream out;
         out << std::put_time(&time_info, fmt);