From 414c116d93a906c2ed9331105c570a8df5de4e1a Mon Sep 17 00:00:00 2001
From: Leonid Startsev <leonid.startsev@jetbrains.com>
Date: Mon, 10 Jun 2019 16:49:19 +0300
Subject: [PATCH] Fix too strict serializer lookup for generic type parameters

---
 .../kotlinx/serialization/compiler/backend/common/TypeUtil.kt  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/TypeUtil.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/TypeUtil.kt
index 0cf63f6c222..fa888085bf7 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/TypeUtil.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/TypeUtil.kt
@@ -122,7 +122,8 @@ fun AbstractSerialGenerator.findTypeSerializerOrContext(
     module: ModuleDescriptor,
     kType: KotlinType,
     sourceElement: PsiElement? = null
-): ClassDescriptor {
+): ClassDescriptor? {
+    if (kType.isTypeParameter()) return null
     return findTypeSerializerOrContextUnchecked(module, kType) ?: throw CompilationException(
         "Serializer for element of type $kType has not been found.\n" +
                 "To use context serializer as fallback, explicitly annotate element with @ContextualSerialization",