Backport "Adjust owner in Interactive.contextOfPath causing crash in ImplicitSearch" to 3.4.1 (#19928)

Backports #19875

Author: Kordyjan

Diff for: compiler/src/dotty/tools/dotc/interactive/Interactive.scala

@@ -297,14 +297,14 @@ object Interactive {
           else
             outer
         case tree @ Block(stats, expr) =>
-          val localCtx = outer.fresh.setNewScope
+          val localCtx = outer.localContext(tree, outer.owner).setNewScope
           stats.foreach {
             case stat: MemberDef => localCtx.enter(stat.symbol)
             case _ =>
           }
-          contextOfStat(stats, nested, ctx.owner, localCtx)
+          contextOfStat(stats, nested, localCtx.owner, localCtx)
         case tree @ CaseDef(pat, _, _) =>
-          val localCtx = outer.fresh.setNewScope
+          val localCtx = outer.localContext(tree, outer.owner).setNewScope
           pat.foreachSubTree {
             case bind: Bind => localCtx.enter(bind.symbol)
             case _ =>

Diff for: language-server/test/dotty/tools/languageserver/CompletionTest.scala

@@ -35,6 +35,20 @@ class CompletionTest {
       .completion(("Conversion", Class, "Conversion"))
   }
 
+  @Test def implicitSearchCrash: Unit =
+    code"""
+          |object Test:
+          |  trait Foo:
+          |    def test(): String
+          |  given Int = ???
+          |  given (using ev: Int): Conversion[String, Foo] = ???
+          |
+          |  val test = {
+          |    "".tes$m1
+          |    1
+          |  }"""
+      .completion(("test", Method, "(): String"))
+
   @Test def completionFromScalaPackageObject: Unit = {
     code"class Foo { val foo: BigD${m1} }"
       .completion(