[Bug c++/12881] New: ICE in make_thunk

[grigory at stl dot sarov dot ru]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12881

           Summary: ICE in make_thunk
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: grigory at stl dot sarov dot ru
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-redhat-linux
  GCC host triplet: i686-redhat-linux
GCC target triplet: i686-redhat-linux

G++ 3.4 (20031029) gives ICE on the the test-case listed below. 
This error seems to be a side-effect of the fix for previous covariant return 
thunk problems - PR c++/12698, PR c++/12699, PR c++/12700, PR c++/12566.

$ g++ -c foo.cpp
foo.cpp:21: internal compiler error: in make_thunk, at cp/method.c:140
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


$ cat foo.cpp
struct c1 {};
struct c3 : virtual c1
{
    virtual c1* f6() {};
    int i;
};

struct c6 : virtual c3 { };
struct c7 : c3
{
    virtual c3* f6() {};
};

struct c24 : virtual c7
{
    virtual c6* f6();
};

c6* c24::f6() {  return 0; }

struct c31 : c24 {};