From 9a514dfdd91a56fecc1c2a35a84b1702f8dcf8d3 Mon Sep 17 00:00:00 2001
From: Mikhail Glukhikh <mikhail.glukhikh@jetbrains.com>
Date: Tue, 24 Dec 2019 18:38:32 +0300
Subject: [PATCH] FIR invoke consumer: do not process last data twice

---
 .../jetbrains/kotlin/fir/resolve/calls/TowerDataConsumers.kt   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/TowerDataConsumers.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/TowerDataConsumers.kt
index 6b685c4fb51..3005a776e56 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/TowerDataConsumers.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/TowerDataConsumers.kt
@@ -143,7 +143,8 @@ class AccumulatingTowerDataConsumer(
 
     fun addConsumer(consumer: TowerDataConsumer): ProcessorAction {
         additionalConsumers += consumer
-        for ((kind, level, group) in accumulatedTowerData) {
+        if (accumulatedTowerData.isEmpty()) return ProcessorAction.NEXT
+        for ((kind, level, group) in accumulatedTowerData.asSequence().take(accumulatedTowerData.size - 1)) {
             if (consumer.consume(kind, level, group).stop()) {
                 return ProcessorAction.STOP
             }