id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12857,boost::wregex failed for case insensitive expression,Borivoj Kostka <kostka@…>,John Maddock,"Expression

.*\.(?i:(doc|docx))

matching

a.doc
a.DOC
a.docx
a.DOCX

doesn't match a.DOCX but matches all other strings.

If I change the order to

.*\.(?i:(docx|doc))

all strings are matched.

Tested with Visual Studio 2012 and gcc 5.3


",Bugs,closed,Boost 1.62.0,regex,Boost 1.61.0,Problem,worksforme,,