Don't use matchSymbol in SourceTree

Simple comparison is enough, since we no longer have to deal with
late-loaded symbols.

Author: odersky

compiler/src/dotty/tools/dotc/interactive/SourceTree.scala

@@ -8,7 +8,6 @@ import ast.tpd
 import core._, core.Decorators.{sourcePos => _, _}
 import Contexts._, NameOps._, Symbols._
 import util._, util.Positions._
-import Interactive.matchSymbol
 
 /** A typechecked named `tree` coming from `source` */
 case class SourceTree(tree: tpd.NameTree, source: SourceFile) {
@@ -48,7 +47,7 @@ object SourceTree {
       def sourceTreeOfClass(tree: tpd.Tree): Option[SourceTree] = tree match {
         case PackageDef(_, stats) =>
           stats.flatMap(sourceTreeOfClass).headOption
-        case tree: tpd.TypeDef if matchSymbol(tree, sym, includeOverridden = false) =>
+        case tree: tpd.TypeDef if tree.symbol == sym =>
           val sourceFile = new SourceFile(sym.sourceFile, Codec.UTF8)
           Some(SourceTree(tree, sourceFile))
         case _ => None