diff -rup a/sysdeps/linux-gnu/aarch64/fetch.c b/sysdeps/linux-gnu/aarch64/fetch.c
--- a/sysdeps/linux-gnu/aarch64/fetch.c	2018-07-05 16:06:04.697642086 -0400
+++ b/sysdeps/linux-gnu/aarch64/fetch.c	2018-07-05 16:16:19.366905601 -0400
@@ -308,12 +308,9 @@ arch_fetch_arg_init(enum tof type, struc
 	struct fetch_script how = pass_arg(context, proc, ret_info);
 	if (how.c == CVT_ERR)
 		goto fail;
-	if (how.c == CVT_NOP && how.f == FETCH_STACK) {
+	if (how.c == CVT_BYREF && how.f == FETCH_GPR) {
 		/* XXX double cast.  */
 		context->x8 = (arch_addr_t) (uintptr_t) context->gregs.regs[8];
-		/* See the comment above about the assert.  */
-		assert(! "Unexpected: first argument passed on stack.");
-		abort();
 	}
 
 	return context;