From 0e3a6ffc1aee52e9cbec447c9d9d96bf370ec9ad Mon Sep 17 00:00:00 2001
From: Albert Meltzer <7529386+kitbellew@users.noreply.github.com>
Date: Sat, 5 Oct 2024 22:24:56 -0700
Subject: [PATCH] FormatWriter: fix rare but possible bug

---
 .../src/main/scala/org/scalafmt/internal/FormatWriter.scala   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/FormatWriter.scala b/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/FormatWriter.scala
index 4d073de42..bfe47706b 100644
--- a/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/FormatWriter.scala
+++ b/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/FormatWriter.scala
@@ -1171,7 +1171,9 @@ class FormatWriter(formatOps: FormatOps) {
             val ft = floc.formatToken
             idx += 1
             columnShift += floc.shift
-            if (floc.hasBreakAfter || ft.leftHasNewline) floc
+            if (
+              floc.hasBreakAfter || ft.leftHasNewline || idx >= locations.length
+            ) floc
             else {
               getAlignNonSlcOwner(ft, locations(idx)).foreach { nonSlcOwner =>
                 val (container, depth) =