[Bug c/77398] first argument to va_arg not of type va_list error hidden by other error

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77398

--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Aug 29 16:41:33 2016
New Revision: 239827

URL: https://gcc.gnu.org/viewcvs?rev=239827&root=gcc&view=rev
Log:
Handle errors in both args of va_arg

2016-08-29  Tom de Vries  <tom@codesourcery.com>

        PR c/77398
        * c-common.c (build_va_arg): Add first argument error.  Build va_arg
        with error_mark_node as va_list instead of with illegal va_list.

        * gimplify.c (gimplify_va_arg_expr): Replace first argument type error
        with assert.

        * g++.dg/ext/va-arg1.C: Add error check for illegal first argument.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/ext/va-arg1.C