Calling java functions without parentheses results in lambdas instead of compilation errors

[scf37]

Compiler version

3.1.3 and later

Minimized code

val p = java.nio.file.Paths.get(".")
println(p.toRealPath)

Output

Playground$$$Lambda$20996/0x00000008047106c8@3cdbaf1c

Expectation

Compilation error (like before) or file path (like what I want). Calling java functions without parentheses was my good habit that suddenly turned out to be bad one.

[som-snytt]

This is due to improvement #14397

Welcome to Scala 3.1.2 (19, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.

scala> "".charAt
val res0: Int => Char = Lambda$1275/0x000000080146c3e0@7cdfa824

scala> java.nio.file.Paths.get(".").toRealPath
-- [E081] Type Error: --------------------------------------------------------------------------------------------------
1 |java.nio.file.Paths.get(".").toRealPath
  |^
  |Missing parameter type
  |
  |I could not infer the type of the parameter x$0 of expanded function:
  |x$0 => $1$.toRealPath(x$0*).
1 error found

scala> "".formatted
-- [E081] Type Error: --------------------------------------------------------------------------------------------------
1 |"".formatted
  |^
  |Missing parameter type
  |
  |I could not infer the type of the parameter x$0 of expanded function:
  |x$0 => "".formatted(x$0*).
1 error found

versus

Welcome to Scala 3.2.2 (19, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.

scala> "".charAt
val res0: Int => Char = Lambda$1315/0x0000000801494000@5feb82b3

scala> "".formatted
val res1: Seq[Object] => String = Lambda$1389/0x00000008014d1000@42cfd794

scala> java.nio.file.Paths.get(".").toRealPath
val res2: Seq[java.nio.file.LinkOption] => java.nio.file.Path = Lambda$1448/0x00000008014d1798@5b5b8730

Also in 2.13, "empty application" does not apply to varargs:

Welcome to Scala 2.13.10 (OpenJDK 64-Bit Server VM, Java 19).
Type in expressions for evaluation. Or try :help.

scala> "".charAt
          ^
       error: missing argument list for method charAt in class String
       Unapplied methods are only converted to functions when a function type is expected.
       You can make this conversion explicit by writing `charAt _` or `charAt(_)` instead of `charAt`.

scala> "".formatted
          ^
       error: missing argument list for method formatted in class String
       Unapplied methods are only converted to functions when a function type is expected.
       You can make this conversion explicit by writing `formatted _` or `formatted(_)` instead of `formatted`.

scala> "".formatted()
val res2: String = ""