diff --git a/metals/src/main/scala/scala/meta/internal/metals/MetalsEnrichments.scala b/metals/src/main/scala/scala/meta/internal/metals/MetalsEnrichments.scala
index 17a63e4b4d4..d1dfaa03e9f 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/MetalsEnrichments.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/MetalsEnrichments.scala
@@ -42,11 +42,11 @@ import scala.meta.internal.mtags.MtagsEnrichments
 import scala.meta.internal.parsing.EmptyResult
 import scala.meta.internal.semanticdb.Scala.Descriptor
 import scala.meta.internal.semanticdb.Scala.Symbols
-import scala.meta.internal.trees.Origin
-import scala.meta.internal.trees.Origin.Parsed
 import scala.meta.internal.{semanticdb => s}
 import scala.meta.io.AbsolutePath
 import scala.meta.io.RelativePath
+import scala.meta.trees.Origin
+import scala.meta.trees.Origin.Parsed
 
 import ch.epfl.scala.{bsp4j => b}
 import com.google.gson.Gson
@@ -1182,17 +1182,17 @@ object MetalsEnrichments
 
     def leadingTokens: Iterator[m.Token] =
       tree.origin match {
-        case Origin.Parsed(input, dialect, pos) =>
-          val tokens = dialect(input).tokenize.get
-          tokens.slice(0, pos.start - 1).reverseIterator
+        case parsed: Origin.Parsed =>
+          val tokens = parsed.dialect(parsed.input).tokenize.get
+          tokens.slice(0, parsed.begTokenIdx - 1).reverseIterator
         case _ => Iterator.empty
       }
 
     def trailingTokens: Iterator[m.Token] =
       tree.origin match {
-        case Origin.Parsed(input, dialect, pos) =>
-          val tokens = dialect(input).tokenize.get
-          tokens.slice(pos.end, tokens.length).iterator
+        case parsed: Origin.Parsed =>
+          val tokens = parsed.dialect(parsed.input).tokenize.get
+          tokens.slice(parsed.endTokenIdx, tokens.length).iterator
         case _ => Iterator.empty
       }
 
diff --git a/metals/src/main/scala/scala/meta/internal/parsing/DocumentSymbolProvider.scala b/metals/src/main/scala/scala/meta/internal/parsing/DocumentSymbolProvider.scala
index c45fb241ec6..836cbafe4b2 100644
--- a/metals/src/main/scala/scala/meta/internal/parsing/DocumentSymbolProvider.scala
+++ b/metals/src/main/scala/scala/meta/internal/parsing/DocumentSymbolProvider.scala
@@ -4,8 +4,8 @@ import java.util
 
 import scala.meta._
 import scala.meta.internal.metals.MetalsEnrichments._
-import scala.meta.internal.trees.Origin
 import scala.meta.transversers.SimpleTraverser
+import scala.meta.trees.Origin
 
 import org.eclipse.lsp4j.DocumentSymbol
 import org.eclipse.lsp4j.SymbolKind
@@ -29,7 +29,7 @@ final class DocumentSymbolProvider(
       tree <- trees.get(path)
     } yield {
       implicit val dialect = tree.origin match {
-        case Origin.Parsed(_, dialect, _) => dialect
+        case parsed: Origin.Parsed => parsed.dialect
         case Origin.None => dialects.Scala213
         case _ => dialects.Scala213
       }
diff --git a/metals/src/main/scala/scala/meta/internal/tvp/IndexedSymbols.scala b/metals/src/main/scala/scala/meta/internal/tvp/IndexedSymbols.scala
index de000d87658..d2314930de6 100644
--- a/metals/src/main/scala/scala/meta/internal/tvp/IndexedSymbols.scala
+++ b/metals/src/main/scala/scala/meta/internal/tvp/IndexedSymbols.scala
@@ -7,6 +7,7 @@ import scala.collection.concurrent.TrieMap
 import scala.meta.Dialect
 import scala.meta._
 import scala.meta.inputs.Input
+import scala.meta.inputs.Input.VirtualFile
 import scala.meta.internal.io.FileIO
 import scala.meta.internal.metals.Buffers
 import scala.meta.internal.metals.MetalsEnrichments._
@@ -20,8 +21,8 @@ import scala.meta.internal.mtags.Symbol
 import scala.meta.internal.mtags.SymbolDefinition
 import scala.meta.internal.parsing.Trees
 import scala.meta.internal.semanticdb.SymbolInformation
-import scala.meta.internal.trees.Origin
 import scala.meta.io.AbsolutePath
+import scala.meta.trees.Origin
 
 class IndexedSymbols(
     isStatisticsEnabled: Boolean,
@@ -80,12 +81,21 @@ class IndexedSymbols(
         (tree, tree.origin) match {
           case (
                 src: Source,
-                Origin.Parsed(input: Input.VirtualFile, dialect, _),
+                parsed: Origin.Parsed,
               ) =>
-            val mtags = new ScalaMtags(input, dialect, Some(src))
-            mtags
-              .index()
-              .symbols
+            parsed.input match {
+              case input: VirtualFile =>
+                Seq.empty[SymbolInformation]
+                val mtags = new ScalaMtags(input, parsed.dialect, Some(src))
+                mtags
+                  .index()
+                  .symbols
+              case input =>
+                scribe.error(
+                  s"[$in] Unexpected input type ${input} in IndexedSymbols"
+                )
+                Seq.empty[SymbolInformation]
+            }
 
           case (tree, origin) =>
             // Trees don't return anything else than Source, and it should be impossible to get here
diff --git a/mtags/src/main/scala/scala/meta/internal/metals/ScaladocIndexer.scala b/mtags/src/main/scala/scala/meta/internal/metals/ScaladocIndexer.scala
index 98d75602634..00483d9f617 100644
--- a/mtags/src/main/scala/scala/meta/internal/metals/ScaladocIndexer.scala
+++ b/mtags/src/main/scala/scala/meta/internal/metals/ScaladocIndexer.scala
@@ -11,8 +11,8 @@ import scala.meta.internal.semanticdb.Scala.Descriptor
 import scala.meta.internal.semanticdb.Scala.Symbols
 import scala.meta.internal.semanticdb.SymbolInformation
 import scala.meta.internal.semanticdb.SymbolOccurrence
-import scala.meta.internal.trees.Origin
 import scala.meta.pc.SymbolDocumentation
+import scala.meta.trees.Origin
 
 /**
  * Extracts Scaladoc from Scala source code.
@@ -29,17 +29,17 @@ class ScaladocIndexer(
       owner: String
   ): Unit = {
     val docstring = currentTree.origin match {
-      case Origin.None => ""
       case parsed: Origin.Parsed =>
         val leadingDocstring =
           ScaladocIndexer.findLeadingDocstring(
             source.tokens,
-            parsed.pos.start - 1
+            parsed.begTokenIdx - 1
           )
         leadingDocstring match {
           case Some(value) => value
           case None => ""
         }
+      case _ => ""
     }
     // Register `@define` macros to use for expanding in later docstrings.
     defines ++= ScaladocParser.extractDefines(docstring)
diff --git a/project/V.scala b/project/V.scala
index d89ce13eafa..11c07c5aace 100644
--- a/project/V.scala
+++ b/project/V.scala
@@ -46,7 +46,7 @@ object V {
   val scalaCli = "1.1.3"
   val scalafix = "0.11.1"
   val scalafmt = "3.7.15"
-  val scalameta = "4.8.15"
+  val scalameta = "4.9.1-RC1"
   val scribe = "3.13.0"
   val qdox = "2.1.0"