I have added the Better Chests mod and I have crashed. Here is the forge log+ some lines of the crash I noticed.
java.lang.NoClassDefFoundError: Could not initialize class aroma1997.betterchests.Upgrade
[09/2/2015 14:10:48 PM] at aroma1997.betterchests.ItemUpgrade.func_94581_a(ItemUpgrade.java:89)
[09/2/2015 14:10:48 PM] at net.minecraft.client.renderer.texture.TextureMap.func_110573_f(TextureMap.java:459)
[09/2/2015 14:10:48 PM] at net.minecraft.client.renderer.texture.TextureMap.<init>(TextureMap.java:86)
[09/2/2015 14:10:48 PM] at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:538)
[09/2/2015 14:10:48 PM] at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
[09/2/2015 14:10:48 PM] at net.minecraft.client.main.Main.main(SourceFile:148)
[09/2/2015 14:10:48 PM] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[09/2/2015 14:10:48 PM] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at java.lang.reflect.Method.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
[09/2/2015 14:10:48 PM] at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[09/2/2015 14:10:48 PM] at aroma1997.betterchests.ItemUpgrade.func_94581_a(ItemUpgrade.java:89)
[09/2/2015 14:10:48 PM] at net.minecraft.client.renderer.texture.TextureMap.func_110573_f(TextureMap.java:459)
[09/2/2015 14:10:48 PM] at net.minecraft.client.renderer.texture.TextureMap.<init>(TextureMap.java:86)
[09/2/2015 14:10:48 PM] at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:538)
[09/2/2015 14:10:48 PM] at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
[09/2/2015 14:10:48 PM] at net.minecraft.client.main.Main.main(SourceFile:148)
[09/2/2015 14:10:48 PM] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[09/2/2015 14:10:48 PM] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at java.lang.reflect.Method.invoke(Unknown Source)
[09/2/2015 14:10:48 PM] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
[09/2/2015 14:10:48 PM] at net.minecraft.launchwrapper.Launch.main(Launch.java:28)