From 54eb4cf928a0fb7be73d2d735c7092150a8ccde9 Mon Sep 17 00:00:00 2001
From: Dmitriy Novozhilov <dmitriy.novozhilov@jetbrains.com>
Date: Mon, 2 Sep 2019 11:12:35 +0300
Subject: [PATCH] [FIR] Add synthetic else branch to `when` if it's missing to
 LightTreeFirBuilder

---
 .../kotlin/fir/lightTree/converter/ExpressionsConverter.kt   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/fir/lightTree/src/org/jetbrains/kotlin/fir/lightTree/converter/ExpressionsConverter.kt b/compiler/fir/lightTree/src/org/jetbrains/kotlin/fir/lightTree/converter/ExpressionsConverter.kt
index a965952edbc..823a63d42a9 100644
--- a/compiler/fir/lightTree/src/org/jetbrains/kotlin/fir/lightTree/converter/ExpressionsConverter.kt
+++ b/compiler/fir/lightTree/src/org/jetbrains/kotlin/fir/lightTree/converter/ExpressionsConverter.kt
@@ -497,6 +497,7 @@ class ExpressionsConverter(
             if (hasSubject) {
                 subject.bind(this)
             }
+            var thereIsElse = false
             for (entry in whenEntries) {
                 val branch = entry.firBlock
                 branches += if (!entry.isElse) {
@@ -508,11 +509,15 @@ class ExpressionsConverter(
                         FirWhenBranchImpl(null, firCondition, branch)
                     }
                 } else {
+                    thereIsElse = true
                     FirWhenBranchImpl(
                         null, FirElseIfTrueCondition(null), branch
                     )
                 }
             }
+            if (!thereIsElse) {
+                branches += FirWhenBranchImpl(null, FirElseIfTrueCondition(null), FirEmptyExpressionBlock())
+            }
         }
     }