3 files changed, 35 insertions, 0 deletions
diff --git a/test/files/presentation/ide-t1001388.check b/test/files/presentation/ide-t1001388.check
new file mode 100644
index 0000000000..d58f86d6c6
--- /dev/null
+++ b/test/files/presentation/ide-t1001388.check
@@ -0,0 +1 @@
+Test OK
+\ No newline at end of file
diff --git a/test/files/presentation/ide-t1001388/Test.scala b/test/files/presentation/ide-t1001388/Test.scala
new file mode 100644
index 0000000000..f6079cf0b2
--- /dev/null
+++ b/test/files/presentation/ide-t1001388/Test.scala
@@ -0,0 +1,28 @@
+import scala.tools.nsc.interactive.tests.InteractiveTest
+import scala.reflect.internal.util.SourceFile
+import scala.tools.nsc.interactive.Response
+
+object Test extends InteractiveTest {
+  override def execute(): Unit = {
+    val sourceA = loadSourceAndWaitUntilTypechecked("A.scala")
+    checkPresent(sourceA)
+  }
+
+  private def loadSourceAndWaitUntilTypechecked(sourceName: String): SourceFile = {
+    val sourceFile = sourceFiles.find(_.file.name == sourceName).head
+    askLoadedTyped(sourceFile).get
+    /* The response to `askLoadedType` may return before `interactive.Global.waitLoadedType`
+     * fully executes. Because this test expects `waitLoadedType` is fully executed before
+     * calling `checkPresent`, with the below no-op presentation compiler request we make
+     * sure this requirement is fulfilled.
+     */
+    compiler.askForResponse(() => ()).get
+    sourceFile
+  }
+
+  private def checkPresent(source: SourceFile): Unit = compiler.getUnitOf(source) match {
+    case Some(unit) => reporter.println("Compilation Unit for " + source.file.name + " still loaded after askLoadedTyped")
+
+    case None => reporter.println("Test OK")
+  }
+}
diff --git a/test/files/presentation/ide-t1001388/src/a/A.scala b/test/files/presentation/ide-t1001388/src/a/A.scala
new file mode 100644
index 0000000000..be09097598
--- /dev/null
+++ b/test/files/presentation/ide-t1001388/src/a/A.scala
@@ -0,0 +1,6 @@
+package a
+
+object A {
+  val tagString = "foo"
+  Seq.empty[Byte].toArray.toSeq
+}