From e4f655d70f38975823b60e4498c72dcf4188e28e Mon Sep 17 00:00:00 2001
From: Jan Lahoda <jan.lahoda@oracle.com>
Date: Thu, 7 Aug 2025 19:13:38 +0200
Subject: [PATCH] Improving test debuggability.

---
 test/langtools/tools/javac/patterns/Exhaustiveness.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/test/langtools/tools/javac/patterns/Exhaustiveness.java b/test/langtools/tools/javac/patterns/Exhaustiveness.java
index 53c4bf82317..a0236f323e2 100644
--- a/test/langtools/tools/javac/patterns/Exhaustiveness.java
+++ b/test/langtools/tools/javac/patterns/Exhaustiveness.java
@@ -1636,10 +1636,11 @@ public class Exhaustiveness extends TestRunner {
     @Test
     public void testDeeplyNestedNotExhaustive(Path base) throws Exception {
         List<String> variants = createDeeplyNestedVariants().stream().collect(Collectors.toCollection(ArrayList::new));
-        variants.remove((int) (Math.random() * variants.size()));
+        int removed = (int) (Math.random() * variants.size());
+        variants.remove(removed);
         String code = testCodeForVariants(variants);
 
-        System.err.println("analyzing:");
+        System.err.println("analyzing (removed: " + removed + "):");
         System.err.println(code);
         doTest(base,
                new String[0],