[Bug c++/36566] New: Cannot bind packed field

[nevin at eviloverlord dot com]

If I have a packed struct and try to pass a member variable by reference to a
function call, I get the "error: cannot bind packed field" message.  If I
explicitly create a reference to the member variable first and pass that,
things work fine.  One of these behaviors must be incorrect.

This issue also exists under gcc 4.0.1 (same host/target/build triplet as
above) and gcc 4.1.2 under Linux.  Under gcc 3.3.3 (on Linux), there was no
error.

Here is code which demonstrates the issue:

struct Squeeze
{
    short   s;
} __attribute__((aligned(1), packed));

void VerticallyChallenged(short&) {}

int main()
{
    Squeeze oj;
    short& pit(oj.s);

    VerticallyChallenged(pit);  // okay
    VerticallyChallenged(oj.s); // cannot bind packed field ‘oj.Squeeze::s’ to
‘short int&’
}


-- 
           Summary: Cannot bind packed field
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nevin at eviloverlord dot com
 GCC build triplet: i686-apple-darwin9
  GCC host triplet: i686-apple-darwin9
GCC target triplet: i686-apple-darwin9


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36566