From 45da95ab131ff765dcaa1f4f436ef8bacde162d2 Mon Sep 17 00:00:00 2001
From: Steve Hancock <perltidy@users.sourceforge.net>
Date: Tue, 5 Apr 2022 06:18:15 -0700
Subject: [PATCH] Fix unusual instability, issue b1333

---
 dev-bin/run_convergence_tests.pl.data | 21 +++++++++++++++++++++
 lib/Perl/Tidy/Formatter.pm            |  5 ++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/dev-bin/run_convergence_tests.pl.data b/dev-bin/run_convergence_tests.pl.data
index d1c33ae0..e44e3269 100644
--- a/dev-bin/run_convergence_tests.pl.data
+++ b/dev-bin/run_convergence_tests.pl.data
@@ -9643,6 +9643,27 @@ WriteMakefile(
 --indent-columns=1
 --square-bracket-vertical-tightness-closing=1
 
+==> b1333.in <==
+# S1
+        $_[
+          HEAP
+
+        ]->{postback_tests}->{$test_number}
+          =
+
+          "ok $test_number\n";
+
+# S2
+        $_[
+          HEAP
+
+          ]->{postback_tests}->{$test_number} =
+
+          "ok $test_number\n";
+
+==> b1333.par <==
+--break-before-all-operators
+
 ==> b140.in <==
 $cmd[ $i ]=[
 	 $s, $e, $cmd, \@hunk, $i ] ;
diff --git a/lib/Perl/Tidy/Formatter.pm b/lib/Perl/Tidy/Formatter.pm
index 98f88196..61f166cd 100644
--- a/lib/Perl/Tidy/Formatter.pm
+++ b/lib/Perl/Tidy/Formatter.pm
@@ -19570,9 +19570,12 @@ EOM
         # This is complex ($total_depth_variation=6):
         # $res2 =
         #  (is_boundp("a", 'self-insert') && is_boundp("b", 'self-insert'));
+
+        # The check ($i_old_.. < $max_index_to_go) was added to fix b1333
         elsif ($i_old_assignment_break
             && $total_depth_variation > 4
-            && $old_breakpoint_count == 1 )
+            && $old_breakpoint_count == 1
+            && $i_old_assignment_break < $max_index_to_go )
         {
             $saw_good_breakpoint = 1;
         } ## end elsif ( $i_old_assignment_break...)
-- 
2.39.5