[Bug c++/78344] ICE on invalid c++ code on x86_64-linux-gnu (internal compiler error: tree check: expected tree_list, have error_mark in cp_check_const_attributes, at cp/decl2.c:1347)

[paolo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78344

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed Jan 17 21:29:59 2018
New Revision: 256821

URL: https://gcc.gnu.org/viewcvs?rev=256821&root=gcc&view=rev
Log:
/cp
2018-01-17  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/78344
        * decl.c (grokdeclarator): Do not append the error_mark_node
        due to an erroneous optional attribute-specifier-seq.

/testsuite
2018-01-17  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/78344
        * g++.dg/cpp0x/alignas13.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/alignas13.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/testsuite/ChangeLog