[Bug c++/37167] New: C++ gives bogus error message (aliased to undefined symbol)

["sje at cup dot hp dot com" <gcc-bugzilla at gcc dot gnu dot org>]

This seems to be caused by the unit-at-a-time changes, the following program
compiled cleanly with -O2 at version 138139 but gives an error message when
compiled (with -O2) at version 138140.  I found it on IA64 HP-UX but was able
to reproduce it on x86_64 Linux.

class A { };
class B : public virtual A { };

class C { public: virtual class A* foo() const; };
class D : public virtual C { public: virtual struct B* foo() const; };

class B* D::foo() const { return 0; }

-----
x.cpp:7: error: 'B* *.LTHUNK1() const' aliased to undefined symbol
'_ZTch0_v0_n24_NK1D3fooEv


-- 
           Summary: C++ gives bogus error message (aliased to undefined
                    symbol)
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sje at cup dot hp dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37167