What's wrong with this yaml file?

Question

I have a plugin.yml file for a bukkit plugin:

name: SlayCraft
version: 1.0.0
main: src.john01dav.slaycraft.SlayCraft

commands:
  scsetspawn:
    permission: slaycraft.setspawn
    description: Sets the SlayCraft spawn point to where you are standing
    usage: /scsetsapwn <arena/lobby>
  scjoin:
    permission: slaycraft.join
    description: Joins the SlayCraft game
    usage: /scjoin
  scfirework:
    permission: slaycraft.firework
    description: Launches a firework at the player's location
    usage: /scfirework
  scexplosion:
    permission: slaycraft.explosion:
    description: Launches an explosion at the player's location
    usage: /scexplosion

permissions:
  slaycraft.setspawn:
    default: op
  slaycraft.join:
    default: true
  slaycraft.firework:
    default: op
  slaycraft.explosion:
    default: op

This yaml looks perfectly fine to me, and yet there are errors. Any ideas? I have searched for people having similar errors, but none of them seem explicable.

Answer 1

The error is pretty specific:

ERROR:

mapping values are not allowed here
  in "<unicode string>", line 19, column 36:
        permission: slaycraft.explosion:
                                       ^

You have an extra colon on this line:

    permission: slaycraft.firework
    description: Launches a firework at the player's location
    usage: /scfirework
  scexplosion:
    permission: slaycraft.explosion: #<-- This colon is not needed.
    description: Launches an explosion at the player's location
    usage: /scexplosion

Remove it.