https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87145
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This fixes it. But is it the best fix?
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -8056,7 +8056,14 @@ convert_template_argument (tree parm,
t = canonicalize_type_argument (t, complain);
if (!type_dependent_expression_p (orig_arg)
- && !uses_template_parms (t))
+ && !uses_template_parms (t)
+ /* This might trigger calling a conversion function with
+ a value-dependent argument, which could invoke taking
+ the address of a temporary representing the result of
+ the conversion. */
+ && !(COMPOUND_LITERAL_P (orig_arg)
+ && MAYBE_CLASS_TYPE_P (TREE_TYPE (orig_arg))
+ && value_dependent_expression_p (orig_arg)))
/* We used to call digest_init here. However, digest_init
will report errors, which we don't want when complain
is zero. More importantly, digest_init will try too
@@ -8092,7 +8099,7 @@ convert_template_argument (tree parm,
&& TREE_CODE (TREE_TYPE (innertype)) == FUNCTION_TYPE
&& TREE_OPERAND_LENGTH (inner) > 0
&& reject_gcc_builtin (TREE_OPERAND (inner, 0)))
- return error_mark_node;
+ return error_mark_node;
}
if (TREE_CODE (val) == SCOPE_REF)
