[1.12.2] Forge 1.12.2-14.23.0.2532 (ASM Transformer/FMLSanityChecker)
After following the installation instructions on the minecraft forums I'm getting an immediate crash of the minecraft launcher with the following log:
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If you installed those two (Forge and LiteLoader) through their installers they added a reference to two different asm-libraries. I fixed this by opening the ".json" file after installations and removing the older asm reference from the libraries list. Path to the file is "%appdata%\.minecraft\versions\(your game version)\(your game version).json"