fix partial require of the gem

pitr-ch · pitr-ch · commit b942fccf8163 · 2018-11-07T08:17:06.000+01:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Current
 
+* (#775) fix partial require of the gem (although not officially supported)
+
 ## Release v1.1.2 (6 Nov 2018)
 
 * (#773) more defensive 1.9.3 support
diff --git a/lib/concurrent/configuration.rb b/lib/concurrent/configuration.rb
@@ -4,6 +4,7 @@
 require 'concurrent/atomic/atomic_reference'
 require 'concurrent/concern/logging'
 require 'concurrent/executor/immediate_executor'
+require 'concurrent/executor/cached_thread_pool'
 require 'concurrent/utility/at_exit'
 require 'concurrent/utility/processor_counter'
 
