Engine Crash When Saving Large Terrain Spline

I’m getting this crash after creating a large Terrain Spline on my landscape.

This is the header of the crash log.

Stack overflow - code c00000fd (first/second chance not available)

UE4Editor_Core!FString::Printf__VA() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\containers\string.cpp:1181]

I second this issue as the exact same thing is happening to me as well, except I’m using 4.20.2 (Binary, not a custom branch). I was able to save my project up to a certain point when creating my landscape spline. Now if I add even one more point to my spline and save (Ctrl+S or Ctrl+Shift+S) I will get a crash every single time. Albeit, my landscape spline is about 2 miles long at this point and I’ve never pushed a landscape spline this far, so maybe that’s the issue?

I just find it odd that I was able to save my project perfectly fine up until a certain point of adding points to my spline. It should also be noted that I can easily keep adding on to my spline without any issues, it’s only upon saving will it crash every single time. I also did nothing else to my project during this time, this only starting happening after working with the landscape spline.

Could someone from Epic chime in on this topic? This is a really bizarre issue.

Crash logs are attached: link text

Yeah this issue hasn’t been fixed, the issue is when joining the ends together in a loop, what i ended up doing was just lining up the ends rather than joining them together, I should report using epics new bug report system.