Add test for #13366

Closes #13366

1 files changed, 28 insertions, 0 deletions

diff --git a/test/behavior/bugs/13366.zig b/test/behavior/bugs/13366.zig
new file mode 100644
index 0000000000..ff90ee00c3
--- /dev/null
+++ b/test/behavior/bugs/13366.zig
@@ -0,0 +1,28 @@
+const builtin = @import("builtin");
+const std = @import("std");
+const expect = std.testing.expect;
+
+const ComptimeReason = union(enum) {
+    c_import: struct {
+        a: u32,
+    },
+};
+
+const Block = struct {
+    reason: ?*const ComptimeReason,
+};
+
+test {
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_x86) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+
+    var a: u32 = 16;
+    var reason = .{ .c_import = .{ .a = a } };
+    var block = Block{
+        .reason = &reason,
+    };
+    try expect(block.reason.?.c_import.a == 16);
+}