From a2bde60819d83e6f75130ac2c93ee4b3c7615800 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 29 Jun 2026 11:40:02 +0200
Subject: FFI/MacOS: Fix calling convention for on-stack varargs.

Thanks to Sergey Kaplun. #1455
---
 src/lj_ccall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lj_ccall.c b/src/lj_ccall.c
index c89d97605..1aae0d40c 100644
--- a/src/lj_ccall.c
+++ b/src/lj_ccall.c
@@ -1091,7 +1091,7 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
     if (CCALL_ALIGN_STACKARG) {  /* Align argument on stack. */
       MSize align = (1u << ctype_align(ccall_struct_align(cts, d))) - 1;
 #if LJ_TARGET_ARM64 && LJ_TARGET_OSX
-      isva = ctype_isstruct(d->info);
+      isva |= ctype_isstruct(d->info);
 #endif
       if (rp || (CCALL_PACK_STACKARG && isva && align < CTSIZE_PTR-1))
 	align = CTSIZE_PTR-1;
-- 
cgit v1.2.3-55-g6feb