Relates to MC-131678.
When using an invalid value for a block property the name of the property and the invalid value are switched in the error message.
For instance the command:
/setblock ~ ~ ~ oak_log[axis=w]
Gives the following error message:
Block minecraft:oak_log does not accept 'axis' for w property
The correct message would be:
Block minecraft:oak_log does not accept 'w' for axis property
Affects 1.13-pre6!