From e1ee75c864356e872708c37801df9ed69075b2f3 Mon Sep 17 00:00:00 2001
From: Valentin Kipyatkov <valentin@jetbrains.com>
Date: Fri, 17 Apr 2020 16:11:38 +0300
Subject: [PATCH] Fix to avoid test flickering
 (SlicerNullnessGroupingTestGenerated.testInlineFunctionManyCalls())

---
 .../kotlin/idea/slicer/HackedSliceNullnessAnalyzerBase.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/idea/src/org/jetbrains/kotlin/idea/slicer/HackedSliceNullnessAnalyzerBase.java b/idea/src/org/jetbrains/kotlin/idea/slicer/HackedSliceNullnessAnalyzerBase.java
index ae28f445b5e..0a8dd206b0b 100644
--- a/idea/src/org/jetbrains/kotlin/idea/slicer/HackedSliceNullnessAnalyzerBase.java
+++ b/idea/src/org/jetbrains/kotlin/idea/slicer/HackedSliceNullnessAnalyzerBase.java
@@ -210,7 +210,9 @@ public abstract class HackedSliceNullnessAnalyzerBase {
     static final int NULLS = 0;
     static final int NOT_NULLS = 1;
     static final int UNKNOWNS = 2;
-    final Collection<PsiElement>[] groupedByValue = new Collection[] {new THashSet<PsiElement>(),new THashSet<PsiElement>(),new THashSet<PsiElement>()};
+    // it's important to use LinkedHashSet's to have consistent output in tests
+    final Collection<PsiElement>[] groupedByValue =
+            new Collection[] {new LinkedHashSet<PsiElement>(), new LinkedHashSet<PsiElement>(), new LinkedHashSet<PsiElement>()};
 
     public void clear() {
       for (Collection<PsiElement> elements : groupedByValue) {