[Bug c++/56762] New: too aggressive optimization or missing warnings

[npl at chello dot at]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56762



             Bug #: 56762

           Summary: too aggressive optimization or missing warnings

    Classification: Unclassified

           Product: gcc

           Version: 4.7.2

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: c++

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

        ReportedBy: n...@chello.at





Created attachment 29743

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29743

code describing the issue



Alternatively this could be just me misunderstanding C++.

But the issue is that I have an object created on the stack and I would expect

it to survive until it goes out of scope.

Now I understand that I probably used it the wrong way by giving it a temporary

when it needed a reference to something more solid, but I would expect an error

message in this case.



Please look at the provided code, which compiles without error/warning. the

exchange function wont have any calls to lock/unlock.



tested with gcc 4.7.2 + 4.8.0