[patch] Fix PR c++/27961

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

Hi,

This bug is an ICE on an invalid template declaration in
cp_finish_decl which can be shown in the following testcase:

struct A
{
   template<int> void foo(X);
};

The attached patch fixes by changing check_var_type to set the return
type to error_mark_node rather than integer_type_node. This can then
be detected in grokdeclarator by checking the returned value from
check_var_type and itself returning error_mark_node if this is what
was returned.

These two changes aren't enough to fix the ICE by themselves which is
why the third hunk to start_decl is required. Together these three
small changes fix the ICE.

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

Cheers,
Lee.

:ADDPATCH c++:

2006-09-23  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/27961
       * decl.c (start_decl): Return error_mark_node if a
       function is initialized like a variable.
       (check_var_type): If a variable of field is declared void,
       set the type to error_mark_node.
       (grokdeclarator): Check the return type of check_var_type.
       * class.c (finish_struct_1): Robustify.

2006-09-23  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/27961
       * g++.dg/template/crash58.C: New test.
       * g++.dg/other/large-size-array.C: Adjust error markers.
       * g++.dg/parse/crash27.C: Likewise.
       * g++.dg/template/crash1.C: Likewise.

Attachment: pr27961.txt
Description: Text document