Wrong codegen transform for final val with literal type but not literal rhs inside trait #17549
Description
Was: Scala.js backend crashes for final val with literal type inside trait
Compiler version
3.2.2, 3.3.0-RC3
Minimized code
The following code crashes the compiler when using the Scala.js backend:
trait T:
final val x: 1 = ???Similar for this example:
trait T:
def f(): Unit = ()
final val x: "test" = { f(); "test" }To trigger the issue, the field needs to be in a trait, it has to be a final val, the field needs a literal type and the right-hand-side needs to different from just being the literal itself (e.g., it compiles for final val x: 1 = 1).
Output
dotty.tools.FatalError: Illegal tree in gen of genInterface(): private val x: Int
class = trait T extends Object {
def <init>(): Unit =
{
this.x = ???()
()
}
private val x: Int
final def x(): Int = this.x
}