https://git.ruby-lang.org/ruby.git/commit/?id=08b82e6b40

From 08b82e6b40b1dbbff20ba609d7d5eb8106a2d346 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@r...>
Date: Sun, 29 May 2022 15:30:44 +0200
Subject: [rubygems/rubygems] Ignore `Errno::EROFS` errors when creating
 `bundler.lock`

Apparently old versions of MacOS would set `GEM_HOME` to a `/System`
folder, and trying to create a file there raises `Errno::EROFS`.

We ignore the error. Any permission issues should be better handled
further down the line.

https://github.com/rubygems/rubygems/commit/ef90c071d0
---
 lib/bundler/process_lock.rb               |  2 +-
 spec/bundler/install/process_lock_spec.rb | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/bundler/process_lock.rb b/lib/bundler/process_lock.rb
index af7cd8a05f..0297f80e2c 100644
--- a/lib/bundler/process_lock.rb
+++ b/lib/bundler/process_lock.rb
@@ -12,7 +12,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/process_lock.rb#L12
         yield
         f.flock(File::LOCK_UN)
       end
-    rescue Errno::EACCES, Errno::ENOLCK, Errno::ENOTSUP, Errno::EPERM
+    rescue Errno::EACCES, Errno::ENOLCK, Errno::ENOTSUP, Errno::EPERM, Errno::EROFS
       # In the case the user does not have access to
       # create the lock file or is using NFS where
       # locks are not available we skip locking.
diff --git a/spec/bundler/install/process_lock_spec.rb b/spec/bundler/install/process_lock_spec.rb
index e2b8d20607..1f8c62f26e 100644
--- a/spec/bundler/install/process_lock_spec.rb
+++ b/spec/bundler/install/process_lock_spec.rb
@@ -42,5 +42,16 @@ RSpec.describe "process lock spec" do https://github.com/ruby/ruby/blob/trunk/spec/bundler/install/process_lock_spec.rb#L42
         expect(processed).to eq true
       end
     end
+
+    context "when creating a lock raises Errno::EROFS" do
+      before { allow(File).to receive(:open).and_raise(Errno::EROFS) }
+
+      it "skips creating the lock file and yields" do
+        processed = false
+        Bundler::ProcessLock.lock(default_bundle_path) { processed = true }
+
+        expect(processed).to eq true
+      end
+    end
   end
 end
-- 
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