diff -r 6342d0570502 -r 2778715487a9 progs/tests/osx-bsd-critical.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/progs/tests/osx-bsd-critical.txt	Sat Apr 09 09:51:00 2016 +0100
@@ -0,0 +1,11 @@
+1	(()|.)(b)	ab	(0,2)(0,1)(?,?)(1,2)
+-1	(()|.)(b)	ab	(1,2)(1,1)(1,1)(1,2)
+2	(()|[ab])(b)	ab	(0,2)(0,1)(?,?)(1,2)
+-2	(()|[ab])(b)	ab	(1,2)(1,1)(1,1)(1,2)
+3	(()|[ab])+b	aaab	(0,4)(2,3)(?,?)
+-3	(()|[ab])+b	aaab	(3,4)(3,3)(3,3)
+11	(.|())(b)	ab	(0,2)(0,1)(?,?)(1,2)
+12	([ab]|())(b)	ab	(0,2)(0,1)(?,?)(1,2)
+14	([ab]|())+b	aaab	(0,4)(2,3)(?,?)
+-14	([ab]|())+b	aaab	(0,4)(3,3)(3,3)
+20	(.?)(b)	ab	(0,2)(0,1)(1,2)