--- Coro/Changes	2014/09/06 20:14:25	1.636
+++ Coro/Changes	2015/02/10 17:50:40	1.637
@@ -7,6 +7,9 @@
 TODO: swap_sv not undone in pool
 TODO: croak when async_pool triesd to run canceled thread?
 
+	- Coro::SemaphoreSet->try did not actually work (analyzed by
+          SATO Kentaro).
+
 6.41 Sat Sep  6 22:08:46 CEST 2014
 	- restore portability to perl 5.8.x.
         - give new Coro's a valid GvHV(PL_hintgv) - this is slow and takes