From 2936602566c5c460abae350a6d59c1da0e0989ee Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Wed, 26 Jul 2023 17:25:54 -0700
Subject: [PATCH] add behavior test for union with 128 bit integer

closes #9871
---
 test/behavior/union.zig | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/test/behavior/union.zig b/test/behavior/union.zig
index f7a481e311..3ea6f17a26 100644
--- a/test/behavior/union.zig
+++ b/test/behavior/union.zig
@@ -1692,3 +1692,24 @@ test "packed union field pointer has correct alignment" {
     try expectEqual(@as(u20, 456), bp.*);
     try expectEqual(@as(u20, 789), cp.*);
 }
+
+test "union with 128 bit integer" {
+    const ValueTag = enum { int, other };
+
+    const Value3 = union(ValueTag) {
+        int: i128,
+        other: bool,
+    };
+    var values: [2]Value3 = undefined;
+    values[0] = .{ .int = 3 };
+    values[1] = .{ .int = 4 };
+
+    var ok: usize = 0;
+
+    for (values) |val| {
+        switch (val) {
+            .int => ok += 1,
+            else => return error.TestFailed,
+        }
+    }
+}