[patch] Fix PR c++/28861

["Lee Millward" <lee dot millward at codesourcery dot com>]

Hi,

This bug is another ICE with an invalid in-class specialisation whcih
can be shown with the following testcase:

struct A
{
 template<template<int> class B> struct B<0>;
};

For this testcase, maybe_process_partial_specialization is returning
error_mark_node, but the calling function - shadow_tag doesn't check
the return value. The attached patch adds in a check for
maybe_process_partial_specialization returning error_mark_node and to
return NULL_TREE from shadow_tag if it does.

Bootstrapped and regression tested on i686-pc-linux-gnu with no new
failures, ok for mainline?

Cheers,
Lee.

:ADDPATCH c++:

2006-09-09  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/28861
       * decl.c (shadow_tag): Return error_mark_node
       if maybe_process_partial_specialization failed.

2006-09-09  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/28861
       * g++.dg/template/spec32.C: New test.
       * g++.dg/parse/crash9.C: Adjust error markers.

Attachment: pr28861.txt
Description: Text document