`inline if` with `null` comparison fails to expand

[japgolly]

Compiler version

3.0.0-RC3

Minimized code

inline def n = null
inline def f = inline if n == null then 0 else 1
inline def m = inline n match { case null => 0; case _ => 1 }

@main def main =
  println(f) // error
  println(m)

Output

[error] 6 |  println(f)
[error]   |          ^
[error]   |Cannot reduce `inline if` because its condition is not a constant value: (null:Null).==(null)
[error]   | This location contains code that was inlined from x.scala:2
[error] one error found

Expectation

Success.

[japgolly]

Oh, it's not just null on null, it seems it's anything and null:

inline def n = "im a string"
inline def f = inline if n == null then 0 else 1
inline def g = inline if null == n then 0 else 1
inline def m = inline n match { case null => 0; case _ => 1 }

@main def main =
  println(f)
  println(g)
  println(m)

[error] 7 |  println(f)
[error]   |          ^
[error]   |Cannot reduce `inline if` because its condition is not a constant value: ("im a string":String).==(null)

[error] 8 |  println(g)
[error]   |          ^
[error]   |Cannot reduce `inline if` because its condition is not a constant value: null.==("im a string":String)

[nicolasstucki]

This was fixed in #12080. It will be in 3.0.1.

[japgolly]

Ah of course, whoops. Thanks @nicolasstucki