Bug: unstable + non-parsing formatting of "single method" argument

[helixbass]

This:

addStateHandlers(
  {
    x: 0
  }, {
    incrementX: ({x, y}) -> -> x: x + y + 1
  },
  (
    oldProps
    newProps
  ) -> oldProps.y isnt newProps.y
)

is first getting formatted as:

addStateHandlers
  x: 0
,
  incrementX: ({x, y}) -> -> x: x + y + 1
,
  (oldProps, newProps) -> oldProps.y isnt newProps.y

but then that is getting formatted as:

addStateHandlers {x: 0}, incrementX: ({x, y}) -> -> x: x + y + 1, (
  oldProps
  newProps
) -> oldProps.y isnt newProps.y

which doesn't parse