[patch] Fix PR c++/29980

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

Hi,

This bug was an ICE with the following testcase:

struct A { typedef int X; };
struct __attribute__((unused)) A::X;

An appropriate error message about the invalid use of "A::X" was being
issued from check_elaborated_type_specifier but it's called,
cp_parser_elaborated_type_specifier wasn't checking the return value
to ensure it's validity before continuing, causing a segmentation
fault later on.

The attach patch fixes this by checking the return value of
check_elaborated_type_specifier from in
cp_parser_elaborated_type_specifier and to return error_mark_node if
the call failed in line with the existing error handling code in
cp_parser_elaborated_type_specifier.

Bootstrapped and regression tested with no new failures on
i686-pc-linux-gnu. Ok for mainline and release branches?

Cheers,
Lee.

:ADDPATCH c++:

cp/
2006-12-06  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/29980
       * cp_parser_elaborated_type_specifier: Check
       the return value of check_elaborated_type_specifier.

testsuite/
2006-12-06  Lee Millward  <lee.millward@codesourcery.com>
       PR c++/29980
       * g++.dg/ext/attrib27.C: New test.
       * g++.dg/parse/struct-as-enum1.C: Adjust error markers.
       * g++.dg/parse/typedef5.C: Likewise.

Attachment: pr29980.txt
Description: Text document