c++/3130: ICE in build_rtti_vtbl_entries with complex virtual derivation

[snyder at fnal dot gov]

>Number:         3130
>Category:       c++
>Synopsis:       ICE in build_rtti_vtbl_entries with complex virtual derivation
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Jun 11 15:46:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     scott snyder
>Release:        3.0 20010611 (prerelease)
>Organization:
>Environment:
System: Linux karma 2.2.16-22 #1 Tue Aug 22 16:49:06 EDT 2000 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../egcs/configure --prefix=/usr/local/egcs --enable-threads=posix --enable-long-long
>Description:

I get an ICE for the source below:

$ ./cc1plus yy.cc
yy.cc:14: Internal error #20010127.
yy.cc:14: Internal compiler error in build_rtti_vtbl_entries, at cp/class.c:
   8199
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.


>How-To-Repeat:


------------------------------------------------------------
struct A
{
  virtual ~A ();
};

struct B
{
  virtual ~B ();
};


struct C : virtual public A, virtual public B {};
class D : public virtual C {};
class E : public virtual C, public virtual D {};
------------------------------------------------------------


>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted:
 
 I have this patch from Nathan installed:
 
 2001-06-11  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/3089
 	* class.c (dfs_accumulate_vtbl_inits): Always walk down the
 	hierarchy looking for primary bases for a ctor
 	vtable. Recursively call oneself, if we meet our primary via
 	this route and haven't met it yet via inheritance graph order.
 
 But i get the ICE both with and without the patch.