From 92e7fe347ab48ea584c0c0539e700d136aa59aa4 Mon Sep 17 00:00:00 2001
From: Alexander Udalov <Alexander.Udalov@jetbrains.com>
Date: Fri, 3 Aug 2018 17:57:19 +0200
Subject: [PATCH] Minor, provide more info when deserializing bad constant
 value

---
 .../serialization/deserialization/AnnotationDeserializer.kt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/AnnotationDeserializer.kt b/core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/AnnotationDeserializer.kt
index 05bca7339aa..21c0f574a10 100644
--- a/core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/AnnotationDeserializer.kt
+++ b/core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/AnnotationDeserializer.kt
@@ -118,8 +118,10 @@ class AnnotationDeserializer(private val module: ModuleDescriptor, private val n
         return if (result.getType(module).isSubtypeOf(expectedType)) {
             result
         } else {
-            // This means that an annotation class has been changed incompatibly without recompiling clients
-            ErrorValue.create("Unexpected argument value")
+            // This usually means that an annotation class has been changed incompatibly without recompiling clients
+            ErrorValue.create(
+                "Unexpected argument value: type ${result.getType(module)} is not a subtype of $expectedType (value.type = ${value.type})"
+            )
         }
     }