From 8ebd2fd1b78da1d1d6ca5d86b11423a8423b17be Mon Sep 17 00:00:00 2001
From: Kirill Rakhman <kirill.rakhman@jetbrains.com>
Date: Mon, 18 Sep 2023 10:27:47 +0200
Subject: [PATCH] [FIR] Implement add in AbbreviatedTypeAttribute

---
 .../org/jetbrains/kotlin/fir/types/AbbreviatedTypeAttribute.kt  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/AbbreviatedTypeAttribute.kt b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/AbbreviatedTypeAttribute.kt
index 4ce57340329..5d0cbf56d4b 100644
--- a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/AbbreviatedTypeAttribute.kt
+++ b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/AbbreviatedTypeAttribute.kt
@@ -12,7 +12,7 @@ class AbbreviatedTypeAttribute(
 ) : ConeAttribute<AbbreviatedTypeAttribute>() {
     override fun union(other: AbbreviatedTypeAttribute?): AbbreviatedTypeAttribute? = null
     override fun intersect(other: AbbreviatedTypeAttribute?): AbbreviatedTypeAttribute? = null
-    override fun add(other: AbbreviatedTypeAttribute?): AbbreviatedTypeAttribute? = null
+    override fun add(other: AbbreviatedTypeAttribute?): AbbreviatedTypeAttribute = other ?: this
     override fun isSubtypeOf(other: AbbreviatedTypeAttribute?): Boolean = true
     override fun toString(): String = "{${coneType.renderForDebugging()}=}"