https://git.ruby-lang.org/ruby.git/commit/?id=c38c1d82b1

From c38c1d82b14237cd9d4268b88fef28e9379280f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@r...>
Date: Mon, 29 Nov 2021 13:43:09 +0100
Subject: [rubygems/rubygems] Let original EACCES error be raised

This block of code already wraps file operations with
`SharedHelpers.filesystem_access`, which rescues and re-raises more
friendly errors. Also, I'm not fully sure creating a temporary directory
can end up raising an `Errno::EACCES` error from reading `tmpdir`
sources. Finally, this rescue block apparently leads to some false
positives when firewall is blocking the ruby executable on Windows, or
at least that's what we've got reported.

In any case, I think it's best to let the original error be raised.

https://github.com/rubygems/rubygems/commit/f7dbe54404
---
 lib/bundler/compact_index_client/updater.rb               |  5 -----
 spec/bundler/bundler/compact_index_client/updater_spec.rb | 10 ----------
 2 files changed, 15 deletions(-)

diff --git a/lib/bundler/compact_index_client/updater.rb b/lib/bundler/compact_index_client/updater.rb
index 06486f98cb7..d9b9cec0d45 100644
--- a/lib/bundler/compact_index_client/updater.rb
+++ b/lib/bundler/compact_index_client/updater.rb
@@ -76,11 +76,6 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/compact_index_client/updater.rb#L76
 
           update(local_path, remote_path, :retrying)
         end
-      rescue Errno::EACCES
-        raise Bundler::PermissionError,
-          "Bundler does not have write access to create a temp directory " \
-          "within #{Dir.tmpdir}. Bundler must have write access to your " \
-          "systems temp directory to function properly. "
       rescue Zlib::GzipFile::Error
         raise Bundler::HTTPError
       end
diff --git a/spec/bundler/bundler/compact_index_client/updater_spec.rb b/spec/bundler/bundler/compact_index_client/updater_spec.rb
index 4acd7dbc634..fe417e39206 100644
--- a/spec/bundler/bundler/compact_index_client/updater_spec.rb
+++ b/spec/bundler/bundler/compact_index_client/updater_spec.rb
@@ -36,16 +36,6 @@ RSpec.describe Bundler::CompactIndexClient::Updater do https://github.com/ruby/ruby/blob/trunk/spec/bundler/bundler/compact_index_client/updater_spec.rb#L36
     end
   end
 
-  context "when bundler doesn't have permissions on Dir.tmpdir" do
-    it "Errno::EACCES is raised" do
-      allow(Bundler::Dir).to receive(:mktmpdir) { raise Errno::EACCES }
-
-      expect do
-        updater.update(local_path, remote_path)
-      end.to raise_error(Bundler::PermissionError)
-    end
-  end
-
   context "when receiving non UTF-8 data and default internal encoding set to ASCII" do
     let(:response) { double(:response, :body => "\x8B".b) }
 
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