[C++ Patch] PR 51225

[Paolo Carlini]

Hi,

in C++11 mode after erroring out for an undeclared name we can easily 
end up calling cxx_eval_constant_expression on a CAST_EXPR etc, which 
has error_mark_node as argument.

The latter trees are currently completely unhandled by 
cxx_eval_constant_expression, thus in order to avoid such ICEs on 
invalid it seems safe setting *non_constant_p = true and returning back 
t, as we do when t itself is error_mark_node, and asserting errorcount. 
The resulting diagnostics is pretty terse.

Tested x86_64-linux.

Thanks,
Paolo.

////////////////
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: CL_51225
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20120113/82720670/attachment.ksh>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: patch_51225
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20120113/82720670/attachment-0001.ksh>