Inconsistency in calling methods without dot selector

[WojciechMazur]

Community build bug found in https://github.com/vladkopanev/cats-saga
Based on Open Community Build #2371
Part of #15647 regressions tracker

Compiler version

All Scala 3 versions
Compiles with Scala 2 (2.13.8)

Minimized code

class Foo{
  def bar[T](fn: () => T): T = ???
}

object Test {
  val x = new Foo
  x bar(() => "hello")  // is fine
  x bar[String](() => "world") // does not compile
}

Output

[error] ./test.scala:8:8: expression expected but '[' found
[error]   x bar[String](() => "hello")
[error]       

Expectation

Should compile

[som-snytt]

It came up previously that type args to infix application was a Scala 2 easter egg but not supportable.

I didn't find the discussion but there is a request for enhancement.

lampepfl/dotty-feature-requests#106

[odersky]

Yes, we are not supporting this, and I think we don't want to.