Added more tests

greg/re_test.go

@@ -476,6 +476,10 @@ var reTests = []struct {
 	{`a[^>]*b`, nil, `a>b`, []Group{}},
 	{`^a*$`, nil, `foo`, []Group{}},
 
+	// Out-of-bounds for character classes
+	{`[b-e]`, nil, `a`, []Group{}},
+	{`[b-e]`, nil, `f`, []Group{}},
+
 	{`*?`, nil, `-`, nil},
 	{`a*?`, nil, `-`, nil}, // non-greedy operators are not supported