From 2f46a45bfd8e04d21a71ed2f296fd4600e6b402c Mon Sep 17 00:00:00 2001
From: Sergey Bogolepov <sergey.bogolepov@jetbrains.com>
Date: Mon, 14 Feb 2022 16:00:30 +0300
Subject: [PATCH] [IR] Deserialize annotation classes as open

Compiler backend relies on the fact that all annotation classes have
OPEN modality. This is not the case for libraries that were compiled
before 1.6.20. 948dc4f3 fixes compatibility for Lazy IR, here we do the
same for IR deserializer.

^KT-51302 fixed
---
 .../common/serialization/IrDeclarationDeserializer.kt  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrDeclarationDeserializer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrDeclarationDeserializer.kt
index 7af94c3065a..45cae8fdc82 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrDeclarationDeserializer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrDeclarationDeserializer.kt
@@ -12,7 +12,9 @@ import org.jetbrains.kotlin.backend.common.serialization.linkerissues.checkError
 import org.jetbrains.kotlin.backend.common.serialization.linkerissues.checkSymbolType
 import org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclaration.DeclaratorCase.*
 import org.jetbrains.kotlin.backend.common.serialization.proto.IrType.KindCase.*
+import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.InlineClassRepresentation
+import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.IrBuiltIns
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.*
@@ -308,6 +310,12 @@ class IrDeclarationDeserializer(
             checkSymbolType<IrClassSymbol>(symbol)
 
             val flags = ClassFlags.decode(fcode)
+            // Similar to 948dc4f3, compatibility hack for libs that were generated before 1.6.20.
+            val effectiveModality = if (flags.kind == ClassKind.ANNOTATION_CLASS) {
+                Modality.OPEN
+            } else {
+                flags.modality
+            }
             symbolTable.declareClass(signature, { symbol }) {
                 irFactory.createClass(
                     startOffset, endOffset, origin,
@@ -315,7 +323,7 @@ class IrDeclarationDeserializer(
                     deserializeName(proto.name),
                     flags.kind,
                     flags.visibility,
-                    flags.modality,
+                    effectiveModality,
                     flags.isCompanion,
                     flags.isInner,
                     flags.isData,