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Release date

September 26, 2013[1]

Snapshot for



Client (.json)

13w39a is the eighth snapshot released for 1.7.2.


  • Added red sand
    • Generated on the lowest surface levels of the mesa biome
    • Behaves like normal sand
    • Can be smelted into glass and crafted into TNT, but cannot be crafted into sandstone
  • Added minecart with command block
    • Can only be obtained using /give (item ID 422 or minecraft:hopper_command_block) or /summon (entity name MinecartCommandBlock)
    • Activated by activator rails
    • Run their command every so often as long as they are powered - Running a command block minecart across a single powered activator rail at full speed will run its command thrice
    • Can be success-tested while on a detector rail with a redstone comparator next to the rail (just like how the minecart with chest and minecart with hopper can be fill-checked)


  • Orange stained clay generates in mesa in place of sandstone
  • When enchanting books, books can now gain multiple enchantments.
  • Logging is now done using Log4j 2
    • Default logging location is now in logs/latest.logs, older logs are archived in logs/2013-09-23-1.lg.gz, with the number at the end increasing each startup
    • Thanks to Log4j 2, the way logs are saved can be changed, examples: html page, database, errors only, no logging at all


9 bugs fixed

From released versions before 1.7

  • MC-673 – Sky/lighting doesn't get darker during a thunderstorm
  • MC-1105 – Villagers act like it is raining when they are in the desert, and it rains elsewhere
  • MC-28405 – The saddle equip sound effect does not play when equipping a pig with a saddle.

From the 1.7 snapshots

  • MC-29521 – Rain doesn't make particles/sound in some biomes (extreme hills)
  • MC-31418 – Snow golems die in extreme hills snow
  • MC-31432 – XP orb sound bug
  • MC-31438 – Enemy Monster slider controls the sound of items entering one's inventory

From the previous snapshot

  • MC-31932Hopper: java.lang.NullPointerException
  • MC-31947 – Hopper: java.lang.NullPointerException