[Bug c++/116741] ICE with invalid cast from void* in constexpr

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116741

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I suppose we could do just:

--- a/gcc/cp/constexpr.cc
+++ b/gcc/cp/constexpr.cc
@@ -8201,8 +8201,11 @@ cxx_eval_constant_expression (const constexpr_ctx *ctx,
tree t,
                  TREE_TYPE (op), TREE_TYPE (TREE_TYPE (sop)),
                  TREE_TYPE (type));
            tree obj = build_fold_indirect_ref (sop);
-           inform (DECL_SOURCE_LOCATION (obj),
-               "pointed-to object declared here");
+           while (TREE_CODE (obj) == COMPONENT_REF)
+             obj = TREE_OPERAND (obj, 1);
+           if (DECL_P (obj))
+             inform (DECL_SOURCE_LOCATION (obj),
+                 "pointed-to object declared here");
          }
        *non_constant_p = true;
        return t;