Reporting this to McJty as well for The One Probe:

Was exploring a singleplayer instance of the latest Devcraft pack (The one EpicSquid just released) and came across a swamp where a ton of pike had spawned. Looked at said pike, framerate dropped, then got a crash. Crashlog pastebin: https://pastebin.com/JcUKyuiU

Not sure if it was an issue with too many pike in one area, an issue rendering the pike in the TOP preview, or a pike rendering in incorrectly, since I'm rubbish at reading a crash log.

Version: Alpha v1.0.,3
TOP Version: 1.14.-1.4.31-alpha

gonna close this and add the info to your other issue