diff --git a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
index 7d2f265fe4c9..9339acf2da6a 100644
--- a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
+++ b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
@@ -8,7 +8,7 @@ import dotty.tools.tasty.{ TastyReader, TastyHeaderUnpickler }
 import Contexts._, Symbols._, Types._, Names._, StdNames._, NameOps._, Scopes._, Decorators._
 import SymDenotations._, unpickleScala2.Scala2Unpickler._, Constants._, Annotations._, util.Spans._
 import NameKinds.DefaultGetterName
-import ast.tpd._
+import ast.tpd._, util._
 import java.io.{ ByteArrayInputStream, ByteArrayOutputStream, DataInputStream, IOException }
 
 import java.lang.Integer.toHexString
@@ -750,7 +750,7 @@ class ClassfileParser(
 
       def unpickleTASTY(bytes: Array[Byte]): Some[Embedded]  = {
         val unpickler = new tasty.DottyUnpickler(bytes)
-        unpickler.enter(roots = Set(classRoot, moduleRoot, moduleRoot.sourceModule))
+        unpickler.enter(roots = Set(classRoot, moduleRoot, moduleRoot.sourceModule))(ctx.withSource(util.NoSource))
         Some(unpickler)
       }
 
diff --git a/compiler/test/dotty/tools/dotc/CompilationTests.scala b/compiler/test/dotty/tools/dotc/CompilationTests.scala
index 22c39588de38..501f57c0049b 100644
--- a/compiler/test/dotty/tools/dotc/CompilationTests.scala
+++ b/compiler/test/dotty/tools/dotc/CompilationTests.scala
@@ -63,6 +63,7 @@ class CompilationTests extends ParallelTesting {
       compileDir("tests/pos-special/adhoc-extension", defaultOptions.and("-strict", "-feature", "-Xfatal-warnings")),
       compileFile("tests/pos-special/i7575.scala", defaultOptions.and("-language:dynamics")),
       compileFile("tests/pos-special/kind-projector.scala", defaultOptions.and("-Ykind-projector")),
+      compileFile("tests/run/i5606.scala", defaultOptions.and("-Yretain-trees")),
     ).checkCompile()
   }