[Bug libstdc++/57173] New: Regex match group contain extraneous character...

[mjnxf at mailinator dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57173



             Bug #: 57173

           Summary: Regex match group contain extraneous character...

    Classification: Unclassified

           Product: gcc

           Version: 4.7.2

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: libstdc++

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: mj...@mailinator.com





Created attachment 30032

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30032

a small program that encapsulates the issue



summary:

    I have a regex built from "/asdf(/.*)"

    I match this regex against this string: "/asdf/qwerty"



    expected output std::smatch:

        1) /asdf/qwerty

        2) /qwerty



    actual output std::smatch:

        1) /asdf/qwerty

        2) f/qwerty



    Notice that in (2) of the actual output, there's a prefix "f" which

shouldn't be there...

compile command:

    g++ -std=c++11 -Wall -Wextra foo.cpp



g++ version:

    g++ (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2



program output:

result: 1

match: /asdf/qwerty

match: f/qwerty