Fix @pool.busy -> @pool.wait race condition/hang.

Author: ioquatix

async-http.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
 	spec.required_ruby_version = ">= 3.2"
 
 	spec.add_dependency "async", ">= 2.10.2"
-	spec.add_dependency "async-pool", "~> 0.9"
+	spec.add_dependency "async-pool", "~> 0.11"
 	spec.add_dependency "io-endpoint", "~> 0.14"
 	spec.add_dependency "io-stream", "~> 0.6"
 	spec.add_dependency "metrics", "~> 0.12"

lib/async/http/client.rb

@@ -80,9 +80,8 @@ def self.open(*arguments, **options, &block)
 			end
 
 			def close
-				while @pool.busy?
+				@pool.wait_until_free do
 					Console.warn(self) {"Waiting for #{@protocol} pool to drain: #{@pool}"}
-					@pool.wait
 				end
 
 				@pool.close