[Bug c++/91055] alignof () evaluated before layout is complete?

[kamleshbhalui at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91055

Kamlesh Kumar <kamleshbhalui at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |kamleshbhalui at gmail dot com

--- Comment #1 from Kamlesh Kumar <kamleshbhalui at gmail dot com> ---
This fixes it.

diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c
index f427c4f4d3e..928dc887956 100644
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -1791,6 +1791,11 @@ cxx_alignof_expr (tree e, tsubst_flags_t complain)
   if (e == error_mark_node)
     return error_mark_node;

+  if (current_class_type && TYPE_BEING_DEFINED (current_class_type))
+    {
+      error ("invalid application of %<alignof%> to a field of a class still
being defined");
+      return error_mark_node;
+    }
   if (processing_template_decl)
     {
       e = build_min (ALIGNOF_EXPR, size_type_node, e);