When attempting to use /setblock to create a block with an invalid state in the console, the error report flips the property and invalid state name.

For example,

Running /setblock ~ ~ ~ minecraft:hopper[facing=up] returns the error: 

Block minecraft:hopper does not accept 'facing' for up property

which should read

Block minecraft:hopper does not accept 'up' for facing property

A screenshot of a second example is attached below.