Extern unions should not trigger active field check

Fixes #3378
2019-10-10 10:47:59 +02:00
parent 4e81df12c3
commit 6cbb732b59
2 changed files with 11 additions and 1 deletions
--- 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();