From 3721034df44b8a17ca717802b66379a29a883060 Mon Sep 17 00:00:00 2001
From: Graham Ollis <plicease@cpan.org>
Date: Tue, 23 Sep 2025 09:36:19 -0600
Subject: [PATCH 1/2] take advantage of newer perls

---
 .github/workflows/linux.yml    |  6 ------
 Changes                        |  1 +
 lib/Test2/Tools/MemoryCycle.pm | 19 +++++++++----------
 t/test2_tools_memorycycle.t    |  1 +
 4 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 772764a..9ffcdae 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -29,12 +29,6 @@ jobs:
           - "5.24"
           - "5.22"
           - "5.20"
-          - "5.18"
-          - "5.16"
-          - "5.14"
-          - "5.12"
-          - "5.10"
-          - "5.8"
 
     env:
       CIP_TAG: ${{ matrix.cip_tag }}
diff --git a/Changes b/Changes
index e6cbb11..76c2cdc 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,7 @@
 Revision history for {{$dist->name}}
 
 {{$NEXT}}
+  - Drop support of Perl prior to 5.20
 
 0.01      2022-09-29 06:33:02 -0600
   - initial version
diff --git a/lib/Test2/Tools/MemoryCycle.pm b/lib/Test2/Tools/MemoryCycle.pm
index bcb6a73..af44967 100644
--- a/lib/Test2/Tools/MemoryCycle.pm
+++ b/lib/Test2/Tools/MemoryCycle.pm
@@ -2,7 +2,9 @@ package Test2::Tools::MemoryCycle;
 
 use strict;
 use warnings;
-use 5.008004;
+use 5.020;
+use feature qw( state );
+use experimental qw( signatures );
 use Devel::Cycle qw( find_cycle );
 use Test2::API qw( context );
 use Exporter qw( import );
@@ -54,9 +56,7 @@ Checks that C<$reference> doesn't have any circular memory references.
 our @EXPORT = qw( memory_cycle_ok );
 
 # Adapted from Test::Memory::Cycle for Test2::API
-sub memory_cycle_ok {
-    my $ref = shift;
-    my $msg = shift;
+sub memory_cycle_ok ($ref, $msg=undef) {
 
     $msg ||= 'no memory cycle';
 
@@ -97,20 +97,19 @@ sub memory_cycle_ok {
     return $ok;
 } # memory_cycle_ok
 
-my %shortnames;
-my $new_shortname = "A";
+sub _ref_shortname ($ref) {
+    state $shortnames = {};
+    state $new_shortname = "A";
 
-sub _ref_shortname {
-    my $ref = shift;
     my $refstr = "$ref";
-    my $refdisp = $shortnames{ $refstr };
+    my $refdisp = $shortnames->{ $refstr };
     if ( !$refdisp ) {
         my $sigil = ref($ref) . " ";
         $sigil = '%' if $sigil eq "HASH ";
         $sigil = '@' if $sigil eq "ARRAY ";
         $sigil = '$' if $sigil eq "REF ";
         $sigil = '&' if $sigil eq "CODE ";
-        $refdisp = $shortnames{ $refstr } = $sigil . $new_shortname++;
+        $refdisp = $shortnames->{ $refstr } = $sigil . $new_shortname++;
     }
 
     return $refdisp;
diff --git a/t/test2_tools_memorycycle.t b/t/test2_tools_memorycycle.t
index 9aec465..a5e72cd 100644
--- a/t/test2_tools_memorycycle.t
+++ b/t/test2_tools_memorycycle.t
@@ -1,3 +1,4 @@
+use 5.020;
 use Test2::V0 -no_srand => 1;
 use Test2::Tools::MemoryCycle;
 

From 63c9c05554494bcaa9476bb552651ff6c044660b Mon Sep 17 00:00:00 2001
From: Graham Ollis <plicease@cpan.org>
Date: Tue, 23 Sep 2025 09:37:49 -0600
Subject: [PATCH 2/2] bump gha versions

---
 .github/workflows/linux.yml  | 4 ++--
 .github/workflows/static.yml | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 9ffcdae..e458af9 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -34,7 +34,7 @@ jobs:
       CIP_TAG: ${{ matrix.cip_tag }}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Bootstrap CIP
         run: |
@@ -47,7 +47,7 @@ jobs:
           cip cache-key
 
       - name: Cache CPAN modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cip
           key: ${{ runner.os }}-build-${{ steps.cache-key.outputs.key }}
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 7f72b51..05fa2c9 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -17,7 +17,7 @@ jobs:
       CIP_TAG: static
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Bootstrap CIP
         run: |