Index: /trunk/boost/xpressive/detail/utility/hash_peek_bitset.hpp

===================================================================

--- /trunk/boost/xpressive/detail/utility/hash_peek_bitset.hpp (revision 43799)

+++ /trunk/boost/xpressive/detail/utility/hash_peek_bitset.hpp (revision 48141)

@@ -105,5 +105,8 @@

     void set_bitset(hash_peek_bitset<Char> const &that)

     {

-        this->bset_ |= that.bset_;

+        if(this->test_icase_(that.icase()))

+        {

+            this->bset_ |= that.bset_;

+        }

     }

Index: /trunk/libs/xpressive/test/regress.txt

===================================================================

--- /trunk/libs/xpressive/test/regress.txt (revision 47901)

+++ /trunk/libs/xpressive/test/regress.txt (revision 48141)

@@ -3739,2 +3739,12 @@

 br0=c

 [end]

+

+[nocasealternate]

+str=common HighLight and Blow this

+pat=highlight|blow

+flg=ig

+sub=<b>$&</b>

+res=common <b>HighLight</b> and <b>Blow</b> this

+br0=HighLight

+br1=Blow

+[end]