Combine PR's #1437, 44, & 63 (#1464)

Gemfile

@@ -13,6 +13,6 @@ gem "jruby-openssl", :platform => "jruby"
 
 gem "rubocop", "~> 0.49.1"
 
-if %w(2.2.8 2.3.4 2.4.1).include? RUBY_VERSION
+if %w(2.2.7 2.2.8 2.3.4 2.4.1).include? RUBY_VERSION
   gem "stopgap_13632", "~> 1.0", :platforms => ["mri", "mingw", "x64_mingw"]
 end

README.md

@@ -217,11 +217,14 @@ Some platforms do not support all Puma features.
 
 ## Known Bugs
 
-For MRI versions 2.2.7, 2.3.4 and 2.4.1, you may see ```stream closed in another thread (IOError)```. It may be caused by a [Ruby bug](https://bugs.ruby-lang.org/issues/13632). It can be fixed with the gem https://rubygems.org/gems/stopgap_13632:
+For MRI versions 2.2.7, 2.2.8, 2.3.4 and 2.4.1, you may see ```stream closed in another thread (IOError)```. It may be caused by a [Ruby bug](https://bugs.ruby-lang.org/issues/13632). It can be fixed with the gem https://rubygems.org/gems/stopgap_13632:
 
 ```ruby
-if %w(2.2.7 2.3.4 2.4.1).include? RUBY_VERSION
-  gem "stopgap_13632", "~> 1.0", :platforms => ["mri", "mingw", "x64_mingw"]
+if %w(2.2.7 2.2.8 2.3.4 2.4.1).include? RUBY_VERSION
+  begin
+    require 'stopgap_13632'
+  rescue LoadError
+  end
 end
 ```
 

lib/puma/cluster.rb

@@ -24,7 +24,7 @@ def stop_workers
       @workers.each { |x| x.term }
 
       begin
-        Process.waitall
+        @workers.each { |w| Process.waitpid(w.pid) }
       rescue Interrupt
         log "! Cancelled waiting for workers"
       end

lib/puma/minissl.rb

@@ -1,3 +1,8 @@
+begin
+  require 'io/wait'
+  rescue LoadError
+end
+
 module Puma
   module MiniSSL
     class Socket
@@ -43,19 +48,20 @@ def read_nonblock(size, *_)
           output = engine_read_all
           return output if output
 
-          if /mswin|mingw/ !~ RUBY_PLATFORM
-            data = @socket.read_nonblock(size)
-          else
-            begin
-              data = @socket.read_nonblock(size)
-            rescue IO::WaitReadable
-              IO.select([@socket.to_io])
-              retry
-            rescue IO::WaitWritable
-              IO.select(nil, [@socket.to_io])
-              retry
+          begin
+            data = @socket.read_nonblock(size, exception: false)
+            if data == :wait_readable || data == :wait_writable
+              if @socket.to_io.respond_to?(data)
+                @socket.to_io.__send__(data)
+              elsif data == :wait_readable
+                IO.select([@socket.to_io])
+              else
+                IO.select(nil, [@socket.to_io])
+              end
+            else
+              break
             end
-          end
+          end while true
 
           @engine.inject(data)
           output = engine_read_all

test/helper.rb

@@ -1,9 +1,11 @@
 # Copyright (c) 2011 Evan Phoenix
 # Copyright (c) 2005 Zed A. Shaw
 
-begin
-  require 'stopgap_13632' if %w(2.2.7 2.3.4 2.4.1).include? RUBY_VERSION
-rescue LoadError
+if %w(2.2.7 2.2.8 2.3.4 2.4.1).include? RUBY_VERSION
+  begin
+    require 'stopgap_13632'
+  rescue LoadError
+  end
 end
 
 begin