I can't confirm whether this crash is caused by MNS, but throwing it out there because I haven't seen this crash before and MNS is the only new mod I've installed recently that relates to the nether.

Basically a crash while traversing the nether, which causes the latest.log to balloon to over 3GB in size. The log is too large to upload or to open in Notepad, but I can open it in Firefox and see a repeating line that takes up almost the entire log:

[19:12:57] [DH-World Gen Thread[0]/WARN]: Cataclysm: Detected a mod with a broken basalt columns configuredfeature that is trying to place blocks outside the 3x3 safe chunk area for features. Find the broken mod and report to them to fix the placement of their basalt columns feature.
[19:12:57] [DH-World Gen Thread[0]/WARN]: Better Dungeons: Detected a mod with a broken basalt columns configuredfeature that is trying to place blocks outside the 3x3 safe chunk area for features. Find the broken mod and report to them to fix the placement of their basalt columns feature.
[19:12:57] [DH-World Gen Thread[0]/WARN]: Repurposed Structures: Detected a mod with a broken basalt columns configuredfeature that is trying to place blocks outside the 3x3 safe chunk area for features. Find the broken mod and report to them to fix the placement of their basalt columns feature.
[19:12:57] [DH-World Gen Thread[0]/WARN]: Bygone Nether: Detected a mod with a broken basalt columns configuredfeature that is trying to place blocks outside the 3x3 safe chunk area for features. Find the broken mod and report to them to fix the placement of their basalt columns feature.

Now, if this mod doesn't add a broken basalt columns configuredfeature, then I guess it must be another mod causing the crash. But figured I would bring it up here just in case.

After doing some more investigating, it looks like this error might be caused by Yung's mods not playing nice with Distant Horizons. Closed and thank you!