Minecraft 1.8 BETA Source code error fixes?

I downloaded Minecraft 1.8 BETA (jar file) recently just to make mods but without MCP because I don't like making mods with forge.
How so ever, so I decompiled and all those stuff and then I had all the source code in IntelliJ Idea, but now I need to know how to fix All the errors, thanks!

Wow… Even mojang, till now, haven't fixed all the bugs in the game… How are you gonna do that? Well, go to each error and fix it manually… Thats how… No other way around it…