Old ores can generate in deepslate area because in tuff generate old ores and tuff generates under y 0
What I expected to happen was...:
Deepslate textures should generate
What actually happened was...:
stone ores generate
Steps to Reproduce:
search under y 0 for an old ore
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Duplicate of MC-216737