[Issue]: Crash on use shader when FastCraft is installed

[erialsan]

Description

Game crashes on shader rendering when FastCraft 1.25 is installed alongside SwanSong 1.3.4.
Steps to reproduce

Install SwanSong 1.3.4 and FastCraft 1.25 together
Launch the game
Crash occurs on enable shader

fml_client_latest.log, and crash reports, if any.

java.lang.IllegalStateException: Not tesselating!
at com.ventooth.swansong.tessellator.ShaderTess.draw(ShaderTess.java:77)
at net.minecraft.client.renderer.Tessellator.func_78381_a
at fastcraft.U.func_85187_a
at net.minecraft.client.gui.FontRenderer.func_78261_a
at net.minecraft.client.gui.GuiMainMenu.func_73863_a

full log
https://mclo.gs/6PxXcUQ

I have submitted the required files

• I confirm that i have attached the required log files as a github attachment, and not as a pastebin/mclogs link.