diff --git a/basic.dat b/basic.dat
index 5c50f37..7859290 100644
--- a/basic.dat
+++ b/basic.dat
@@ -57,9 +57,10 @@ E	:::1:::0:|:::1:1:1:	:::0:::1:::1:::0:	(8,17)
 {E	[[:upper:]]		A		(0,1)	[[<element>]] not supported
 E	[[:lower:]]+		`az{		(1,3)
 E	[[:upper:]]+		@AZ[		(1,3)
-BE	[[-]]			[[-]]		(2,4)
-BE	[[.NIL.]]	NULL	ECOLLATE
-BE	[[=aleph=]]	NULL	ECOLLATE
+# No collation in Go
+#BE	[[-]]			[[-]]		(2,4)
+#BE	[[.NIL.]]	NULL	ECOLLATE
+#BE	[[=aleph=]]	NULL	ECOLLATE
 }
 BE$	\n		\n	(0,1)
 BEn$	\n		\n	(0,1)
@@ -123,20 +124,24 @@ E	((a))			abc		(0,1)(0,1)(0,1)
 E	(a)b(c)			abc		(0,3)(0,1)(2,3)
 E	a+b+c			aabbabc		(4,7)
 E	a*			aaa		(0,3)
-E	(a*)*			-		(0,0)(0,0)
+#E	(a*)*			-		(0,0)(0,0)
+E	(a*)*			-		(0,0)(?,?)	RE2/Go
 E	(a*)+			-		(0,0)(0,0)
-E	(a*|b)*			-		(0,0)(0,0)
+#E	(a*|b)*			-		(0,0)(0,0)
+E	(a*|b)*			-		(0,0)(?,?)	RE2/Go
 E	(a+|b)*			ab		(0,2)(1,2)
 E	(a+|b)+			ab		(0,2)(1,2)
 E	(a+|b)?			ab		(0,1)(0,1)
 BE	[^ab]*			cde		(0,3)
-E	(^)*			-		(0,0)(0,0)
+#E	(^)*			-		(0,0)(0,0)
+E	(^)*			-		(0,0)(?,?)	RE2/Go
 BE	a*			NULL		(0,0)
 E	([abc])*d		abbbcd		(0,6)(4,5)
 E	([abc])*bcd		abcd		(0,4)(0,1)
 E	a|b|c|d|e		e		(0,1)
 E	(a|b|c|d|e)f		ef		(0,2)(0,1)
-E	((a*|b))*		-		(0,0)(0,0)(0,0)
+#E	((a*|b))*		-		(0,0)(0,0)(0,0)
+E	((a*|b))*		-		(0,0)(?,?)(?,?)	RE2/Go
 BE	abcd*efg		abcdefg		(0,7)
 BE	ab*			xabyabbbz	(1,3)
 BE	ab*			xayabbbz	(1,2)
diff --git a/nullsubexpr.dat b/nullsubexpr.dat
index c73d8f0..2e18fbb 100644
--- a/nullsubexpr.dat
+++ b/nullsubexpr.dat
@@ -1,7 +1,8 @@
 NOTE	null subexpression matches : 2002-06-06
 
 E	(a*)*		a		(0,1)(0,1)
-E	SAME		x		(0,0)(0,0)
+#E	SAME		x		(0,0)(0,0)
+E	SAME		x		(0,0)(?,?)	RE2/Go
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	(a*)+		a		(0,1)(0,1)
@@ -18,7 +19,8 @@ E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 
 E	([a]*)*		a		(0,1)(0,1)
-E	SAME		x		(0,0)(0,0)
+#E	SAME		x		(0,0)(0,0)
+E	SAME		x		(0,0)(?,?)	RE2/Go
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	([a]*)+		a		(0,1)(0,1)
@@ -26,7 +28,8 @@ E	SAME		x		(0,0)(0,0)
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	([^b]*)*	a		(0,1)(0,1)
-E	SAME		b		(0,0)(0,0)
+#E	SAME		b		(0,0)(0,0)
+E	SAME		b		(0,0)(?,?)	RE2/Go
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaab		(0,6)(0,6)
 E	([ab]*)*	a		(0,1)(0,1)
@@ -38,18 +41,20 @@ E	SAME		bbbbbb		(0,6)(0,6)
 E	SAME		aaaabcde	(0,5)(0,5)
 E	([^a]*)*	b		(0,1)(0,1)
 E	SAME		bbbbbb		(0,6)(0,6)
-E	SAME		aaaaaa		(0,0)(0,0)
+#E	SAME		aaaaaa		(0,0)(0,0)
+E	SAME		aaaaaa		(0,0)(?,?)	RE2/Go
 E	([^ab]*)*	ccccxx		(0,6)(0,6)
-E	SAME		ababab		(0,0)(0,0)
+#E	SAME		ababab		(0,0)(0,0)
+E	SAME		ababab		(0,0)(?,?)	RE2/Go
 
 E	((z)+|a)*	zabcde		(0,2)(1,2)
 
-{E	a+?		aaaaaa		(0,1)	no *? +? mimimal match ops
-E	(a)		aaa		(0,1)(0,1)
-E	(a*?)		aaa		(0,0)(0,0)
-E	(a)*?		aaa		(0,0)
-E	(a*?)*?		aaa		(0,0)
-}
+#{E	a+?		aaaaaa		(0,1)	no *? +? mimimal match ops
+#E	(a)		aaa		(0,1)(0,1)
+#E	(a*?)		aaa		(0,0)(0,0)
+#E	(a)*?		aaa		(0,0)
+#E	(a*?)*?		aaa		(0,0)
+#}
 
 B	\(a*\)*\(x\)		x	(0,1)(0,0)(0,1)
 B	\(a*\)*\(x\)		ax	(0,2)(0,1)(1,2)
@@ -60,7 +65,8 @@ B	\(a*\)*\(x\)\(\1\)	axa	(0,3)(0,1)(1,2)(2,3)
 B	\(a*\)*\(x\)\(\1\)\(x\)	axax	(0,4)(0,1)(1,2)(2,3)(3,4)
 B	\(a*\)*\(x\)\(\1\)\(x\)	axxa	(0,3)(1,1)(1,2)(2,2)(2,3)
 
-E	(a*)*(x)		x	(0,1)(0,0)(0,1)
+#E	(a*)*(x)		x	(0,1)(0,0)(0,1)
+E	(a*)*(x)		x	(0,1)(?,?)(0,1)	RE2/Go
 E	(a*)*(x)		ax	(0,2)(0,1)(1,2)
 E	(a*)*(x)		axa	(0,2)(0,1)(1,2)
 
diff --git a/repetition.dat b/repetition.dat
index 8e855ac..e6361f5 100644
--- a/repetition.dat
+++ b/repetition.dat
@@ -1,12 +1,11 @@
-NOTE	implicit vs. explicit repetitions : 2002-08-01
-#
+NOTE	implicit vs. explicit repetitions : 2009-02-02
+
 # Glenn Fowler <gsf@research.att.com>
 # conforming matches (column 4) must match one of the following BREs
 #	NOMATCH
 #	(0,.)\((\(.\),\(.\))(?,?)(\2,\3)\)*
 #	(0,.)\((\(.\),\(.\))(\2,\3)(?,?)\)*
 # i.e., each 3-tuple has two identical elements and one (?,?)
-#
 
 E	((..)|(.))				NULL		NOMATCH
 E	((..)|(.))((..)|(.))			NULL		NOMATCH
@@ -43,10 +42,12 @@ E	((..)|(.))((..)|(.))			aaa		(0,3)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)
 E	((..)|(.))((..)|(.))((..)|(.))		aaa		(0,3)(0,1)(?,?)(0,1)(1,2)(?,?)(1,2)(2,3)(?,?)(2,3)
 
 E	((..)|(.)){1}				aaa		(0,2)(0,2)(0,2)(?,?)
-E	((..)|(.)){2}				aaa		(0,3)(2,3)(?,?)(2,3)
+#E	((..)|(.)){2}				aaa		(0,3)(2,3)(?,?)(2,3)
+E	((..)|(.)){2}				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go
 E	((..)|(.)){3}				aaa		(0,3)(2,3)(?,?)(2,3)
 
-E	((..)|(.))*				aaa		(0,3)(2,3)(?,?)(2,3)
+#E	((..)|(.))*				aaa		(0,3)(2,3)(?,?)(2,3)
+E	((..)|(.))*				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go
 
 E	((..)|(.))				aaaa		(0,2)(0,2)(0,2)(?,?)
 E	((..)|(.))((..)|(.))			aaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
@@ -54,7 +55,8 @@ E	((..)|(.))((..)|(.))((..)|(.))		aaaa		(0,4)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)(3,4)
 
 E	((..)|(.)){1}				aaaa		(0,2)(0,2)(0,2)(?,?)
 E	((..)|(.)){2}				aaaa		(0,4)(2,4)(2,4)(?,?)
-E	((..)|(.)){3}				aaaa		(0,4)(3,4)(?,?)(3,4)
+#E	((..)|(.)){3}				aaaa		(0,4)(3,4)(?,?)(3,4)
+E	((..)|(.)){3}				aaaa		(0,4)(3,4)(0,2)(3,4)	RE2/Go
 
 E	((..)|(.))*				aaaa		(0,4)(2,4)(2,4)(?,?)
 
@@ -64,9 +66,11 @@ E	((..)|(.))((..)|(.))((..)|(.))		aaaaa		(0,5)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)(4,5
 
 E	((..)|(.)){1}				aaaaa		(0,2)(0,2)(0,2)(?,?)
 E	((..)|(.)){2}				aaaaa		(0,4)(2,4)(2,4)(?,?)
-E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(?,?)(4,5)
+#E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(?,?)(4,5)
+E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go
 
-E	((..)|(.))*				aaaaa		(0,5)(4,5)(?,?)(4,5)
+#E	((..)|(.))*				aaaaa		(0,5)(4,5)(?,?)(4,5)
+E	((..)|(.))*				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go
 
 E	((..)|(.))				aaaaaa		(0,2)(0,2)(0,2)(?,?)
 E	((..)|(.))((..)|(.))			aaaaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
@@ -92,14 +96,22 @@ NOTE	additional repetition tests graciously provided by Chris Kuklewicz www.hask
 :HA#106:E	X(.?){6,}Y	X1234567Y	(0,9)(7,8)
 :HA#107:E	X(.?){7,}Y	X1234567Y	(0,9)(7,8)
 :HA#108:E	X(.?){8,}Y	X1234567Y	(0,9)(8,8)
-:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(7,8)
-:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(7,8)
-:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(7,8)
-:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(7,8)
-:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(7,8)
-:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(7,8)
-:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(7,8)
-:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(7,8)
+#:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(7,8)
+:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(7,8)
+:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(7,8)
+:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(7,8)
+:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(7,8)
+:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(7,8)
+:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(7,8)
+:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
+#:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(7,8)
+:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
 :HA#118:E	X(.?){8,8}Y	X1234567Y	(0,9)(8,8)
 
 # These test a fixed bug in my regex-tdfa that did not keep the expanded
@@ -127,15 +139,25 @@ NOTE	additional repetition tests graciously provided by Chris Kuklewicz www.hask
 # The above worked on Linux/GLIBC but the following often fail.
 # They also trip up OS X / FreeBSD / NetBSD:
 
-:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
+#:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
 :HA#284:E	(ab|a|c|bcd){4,}(d*)	ababcd	NOMATCH
-:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
+#:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
 :HA#289:E	(ab|a|c|bcd){4,10}(d*)	ababcd	NOMATCH
-:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(3,6)(6,6)
-:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(3,6)(6,6)
+#:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
+#:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(3,6)(6,6)
+:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go