Interactive.pathTo shows ImportType for repeated enum case.

[tgodzik]

Minimized code

Running:

val pos = sourcePosition(driver, params, uri)
val trees = driver.openedTrees(uri)
val path = Interactive.pathTo(trees, pos)
val tp = Interactive.enclosingType(trees, pos)
val tpw = tp.widenTermRefExpr

on

object SimpleEnum:
  enum Color:
    case Re@@d, Green, Blue

will produce type tree:

val tpw = ImportType(Ident(Color))

Expectation

We should get a valid type representing the Color enum.

What is weird is that Interactive.pathTo gives us:

path.head == Import(Ident(Color),List(ImportSelector(Ident(Red),EmptyTree,EmptyTree), ImportSelector(Ident(Green),EmptyTree,EmptyTree), ImportSelector(Ident(Blue),EmptyTree,EmptyTree)))

while there are no actual imports.

[bishabosha]

This may be because the first statement of an enum class template in the AST is an import statement of the cases, (its synthetic) which is probably overlapping the span for the actual cases.
https://github.com/lampepfl/dotty/blob/2961f69fe2805d8901103496f588d976f212d8ac/compiler/src/dotty/tools/dotc/ast/Desugar.scala#L521

[smarter]

You should be able to set a zero-extent span to that tree so pathTo skips over it.