From b87ddd7538220e9782274281356fd55bfd29078b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@riseup.net>
Date: Fri, 19 Aug 2022 20:35:26 +0200
Subject: [PATCH] [rubygems/rubygems] Fix `bundle platform` crash when there's
 a lockfile with no Ruby locked

https://github.com/rubygems/rubygems/commit/49fc54e87d
---
 lib/bundler/cli/platform.rb            |  2 +-
 spec/bundler/commands/platform_spec.rb | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/lib/bundler/cli/platform.rb b/lib/bundler/cli/platform.rb
index 16d4e0145a..73da8cf80e 100644
--- a/lib/bundler/cli/platform.rb
+++ b/lib/bundler/cli/platform.rb
@@ -9,7 +9,7 @@ module Bundler
 
     def run
       platforms, ruby_version = Bundler.ui.silence do
-        locked_ruby_version = Bundler.locked_gems && Bundler.locked_gems.ruby_version.gsub(/p\d+\Z/, "")
+        locked_ruby_version = Bundler.locked_gems && Bundler.locked_gems.ruby_version&.gsub(/p\d+\Z/, "")
         gemfile_ruby_version = Bundler.definition.ruby_version && Bundler.definition.ruby_version.single_version_string
         [Bundler.definition.platforms.map {|p| "* #{p}" },
          locked_ruby_version || gemfile_ruby_version]
diff --git a/spec/bundler/commands/platform_spec.rb b/spec/bundler/commands/platform_spec.rb
index 0b964eac8c..4e8e3946fe 100644
--- a/spec/bundler/commands/platform_spec.rb
+++ b/spec/bundler/commands/platform_spec.rb
@@ -234,6 +234,29 @@ G
       expect(out).to eq("ruby 1.0.0")
     end
 
+    it "handles when there is a lockfile with no requirement" do
+      gemfile <<-G
+        source "#{file_uri_for(gem_repo1)}"
+      G
+
+      lockfile <<-L
+        GEM
+          remote: #{file_uri_for(gem_repo1)}/
+          specs:
+
+        PLATFORMS
+          ruby
+
+        DEPENDENCIES
+
+        BUNDLED WITH
+           #{Bundler::VERSION}
+      L
+
+      bundle "platform --ruby"
+      expect(out).to eq("No ruby version specified")
+    end
+
     it "handles when there is a requirement in the gemfile" do
       gemfile <<-G
         source "#{file_uri_for(gem_repo1)}"