typeCheckErrors reports false errors for enum and case object definitions #23578
Description
scala.compiletime.testing.typeChecks and typeCheckErrors will report type-check failure for case objects and enums which contain at least one case with no parameters. this seems to only happen when called outside of an inline def.
Compiler version
bug reproduced on 3.3.6, 3.7.0.
tested 3.3.4, 3.3.5 and 3.7.1 do not have the bug
Minimized code
3.3.6 scastie https://scastie.scala-lang.org/3o5RBHQPQje29ie9erAO5A
import scala.compiletime.testing.{typeChecks, typeCheckErrors}
println(typeCheckErrors("""
enum E {
case E1
}
case object A
"""))
println("------")
def go(): Unit = {
println(typeCheckErrors("""
enum E {
case E1
}
case object A
"""))
}
go()
println("------")
inline def go2(): Unit = {
println(typeCheckErrors("""
enum E {
case E1
}
case object A
"""))
}
go2()
println("------")Output
note that the list of errors has one for both the case object and the enum definitions.
note that the last test, called from within the inline def, shows no errors (as expected).
List(Error(object creation impossible, since:
it has 3 unimplemented members.
/** As seen from module class A$, the missing signatures are as follows.
* For convenience, these are usable as stub implementations.
*/
// Members declared in scala.Equals
def canEqual(that: Any): Boolean = ???
// Members declared in scala.Product
def productArity: Int = ???
def productElement(n: Int): Any = ???
,case object A,12,Typer), Error(object creation impossible, since def ordinal: Int in trait Enum in package scala.reflect is not defined , case E1,2,Typer))
------
List(Error(object creation impossible, since:
it has 3 unimplemented members.
/** As seen from module class A$, the missing signatures are as follows.
* For convenience, these are usable as stub implementations.
*/
// Members declared in scala.Equals
def canEqual(that: Any): Boolean = ???
// Members declared in scala.Product
def productArity: Int = ???
def productElement(n: Int): Any = ???
, case object A,14,Typer), Error(object creation impossible, since def ordinal: Int in trait Enum in package scala.reflect is not defined , case E1,4,Typer))
------
List()
------
Expectation
first, the behaviour of typeCheckErrors should not change depending on whether it's called from within an inline def.
secondly, typeChecks/typeCheckErrors should report no type errors for these valid code snippets.