From 885403ea7796ea66f7ec9dfcf7d7d347e7012c8f Mon Sep 17 00:00:00 2001
From: Hamza Remmal <hamza@remmal.net>
Date: Thu, 6 Feb 2025 13:53:08 +0100
Subject: [PATCH] chore: Allow to write tasty for Scala2 symbols under
 -Ycompile-scala2-library

---
 compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
index 7b80c7c80a21..cf9885d16d1f 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
@@ -861,7 +861,7 @@ class TreePickler(pickler: TastyPickler, attributes: Attributes) {
       assert(isModifierTag(tag))
       writeByte(tag)
     }
-    assert(!flags.is(Scala2x))
+    if flags.is(Scala2x) then assert(attributes.scala2StandardLibrary)
     if (flags.is(Private)) writeModTag(PRIVATE)
     if (flags.is(Protected)) writeModTag(PROTECTED)
     if (flags.is(Final, butNot = Module)) writeModTag(FINAL)