Strange unit math in 2.x

[shoomyth]

calc(100vw - (100vw - 100%))

I'm using this hack to solve ios scroll bug.

1.3.0: calc(100vw - (100vw - 100%))
2.0: calc(0vw - 100%)

Can't understand new math with different units. This is totally incorrect. I can understand calc(0vw + 100%), but current behavior looks very suspicious.

[codefo]

Confirm, I've just reproduced this bug on my project.

[andyjansson]

Looks like the following case is wrong: https://github.com/MoOx/reduce-css-calc/blob/master/src/lib/reducer.js#L99

Mind confirming that it's the only incorrect case?