From 6cbb732b59d1ded92c7272a8b06f645e1c8acfd2 Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Thu, 10 Oct 2019 10:47:59 +0200
Subject: Extern unions should not trigger active field check

Fixes #3378
---
 src/ir.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/ir.cpp')

diff --git a/src/ir.cpp b/src/ir.cpp
index 8fecbf7a18..7dd141423c 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -17951,7 +17951,7 @@ static IrInstruction *ir_analyze_container_field_ptr(IrAnalyze *ira, Buf *field_
                     union_val->special = ConstValSpecialStatic;
                     bigint_init_bigint(&union_val->data.x_union.tag, &field->enum_field->value);
                     union_val->data.x_union.payload = payload_val;
-                } else {
+                } else if (bare_type->data.unionation.layout != ContainerLayoutExtern) {
                     TypeUnionField *actual_field = find_union_field_by_tag(bare_type, &union_val->data.x_union.tag);
                     if (actual_field == nullptr)
                         zig_unreachable();
-- 
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