[Server Crash] - Server Crash upon using Gunpowder

[SnarkyLamassu]

Bug Submission:

Category: Server Crash

Issue Title: Server Crash upon using Gunpowder

Issue Description: We can create gunpowder, but upon placing it on the ground and lighting it, the server crashed before any explosion.

Reproduced the crash 3 times: twice with a stack of gunpowder lit with Willow's lighter, once with a single gunpowder and a normal torch (in case the lighter was the issue). All 3 times it crashed with the same error.

Steps to Reproduce: In a 2 player game, non-PVP. Place gunpowder on the ground, light it, and the game should crash.

[rezecib]

For devs, this is the stack trace:

...t Starve Together Beta/data/scripts/entityscript.lua:908: assertion failed!

LUA ERROR stack traceback:

        =[C] in function 'assert'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/entityscript.lua(908,1) in function 'GetDistanceSqToInst'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/components/playercontroller.lua(1863,1) in function 'ShakeCamera'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/components/explosive.lua(33,1) in function 'OnBurnt'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/components/burnable.lua(17,1) in function 'fn'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/scheduler.lua(170,1) in function 'OnTick'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/scheduler.lua(381,1) in function 'RunScheduler'

        C:/Program Files (x86)/Steam/steamapps/common/Don't Starve Together Beta/data/scripts/update.lua(163,1)

scripts/frontend.lua(763,1) SCRIPT ERROR! Showing error screen

 

Looks like entity:IsValid() is getting to the C++ (C?) code, so I can't dig deeper.