[Bug c++/41427] New: variables with the same name as a "for" variable should be invalid

[ciobi at inbox dot com]

Consider this code:

void f1()
{
    for (int i = 0;;)
        int i;
}

void f2()
{
    for (int i = 0;;)
    {
        int i;
    }
}

void f3()
{
    for (int i = 0;;)
    {
        {
            int i;
        }
    }
}

Only f3() should compile, yet f1() and f2() compile too.

While f1() seems wrong without giving it much thought, f2() is wrong as well,
due to 6.4/3 (which seems a bit at odds with 6.5.3)

I tested 4.3.3 and 4.4.0

This issue was found during a port to MSVC, and was covered here:
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=489105


-- 
           Summary: variables with the same name as a "for" variable should
                    be invalid
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ciobi at inbox dot com
 GCC build triplet: x86_64-suse-linux
  GCC host triplet: x86_64-suse-linux
GCC target triplet: x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41427