Merge pull request #11392 from dotty-staging/fix-#2340

Add regression test

Author: nicolasstucki

compiler/src/dotty/tools/io/ZipArchive.scala

@@ -231,11 +231,12 @@ final class ManifestResources(val url: URL) extends ZipArchive(null, None) {
     for (zipEntry <- iter) {
       val dir = getDir(dirs, zipEntry)
       if (!zipEntry.isDirectory) {
-        val f = new Entry(zipEntry.getName, dir) {
+        class FileEntry() extends Entry(zipEntry.getName, dir) {
           override def lastModified = zipEntry.getTime()
           override def input        = resourceInputStream(this.path)
           override def sizeOption   = None
         }
+        val f = new FileEntry()
         dir.entries(f.name) = f
       }
     }

tests/pos/i2340.scala

@@ -0,0 +1,8 @@
+sealed class Entry(path: Int)
+
+class Test {
+  def test = {
+    class FileEntry() extends Entry(1)
+    val f = new FileEntry()
+  }
+}