Java Edition 13w39a

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Java Edition



Release date

September 26, 2013[1]

Snapshot for



Client (.json)
Server (.exe)

Protocol version


13w39a is the eighth snapshot released for Java Edition 1.7.2.



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.

Non-mob entities[edit]

Minecart with command block
  • Can only be obtained using /give @p 422, /give @p hopper_command_block or /summon 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).



Enchanted books
  • Can now give multiple enchantments.

World generation[edit]

  • Orange terracotta generates in place of sandstone, but not in the same type of formation.


  • 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.
  • The way logs are saved can be changed, examples: html page, database, errors only, no logging at all.


9 issues fixed
From released versions before 1.7.2
  • 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 1.7.2 development versions
  • 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 development version


  • 13w39a was previously removed from the launcher for some time, but was added back in September 2018.