From 5eaf948e6250391b412881aeb702666bfe7d4c42 Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Mon, 20 Apr 2020 18:47:06 +0200
Subject: [PATCH] stage1: Fix wrong union access

Thanks to @frett27 on irc for reporting the compiler would segfault when
run on ARM.
---
 src/codegen.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/codegen.cpp b/src/codegen.cpp
index ea4d698cde..dad8e4768a 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -1887,7 +1887,7 @@ static bool iter_function_params_c_abi(CodeGen *g, ZigType *fn_type, FnWalk *fn_
                     if (type_is_nonnull_ptr(g, ty)) {
                         addLLVMArgAttr(llvm_fn, fn_walk->data.attrs.gen_i, "nonnull");
                     }
-                    if (ptr_type->data.pointer.is_const) {
+                    if (ptr_type->id == ZigTypeIdPointer && ptr_type->data.pointer.is_const) {
                         addLLVMArgAttr(llvm_fn, fn_walk->data.attrs.gen_i, "readonly");
                     }
                     if (param_info->is_noalias) {