3 files changed, 66 insertions, 0 deletions
diff --git a/test/behavior/fn.zig b/test/behavior/fn.zig
index 383d553781..044e4ff049 100644
--- a/test/behavior/fn.zig
+++ b/test/behavior/fn.zig
@@ -408,3 +408,17 @@ test "function with inferred error set but returning no error" {
     const return_ty = @typeInfo(@TypeOf(S.foo)).Fn.return_type.?;
     try expectEqual(0, @typeInfo(@typeInfo(return_ty).ErrorUnion.error_set).ErrorSet.?.len);
 }
+
+test "import passed byref to function in return type" {
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+
+    const S = struct {
+        fn get() @import("std").ArrayListUnmanaged(i32) {
+            var x: @import("std").ArrayListUnmanaged(i32) = .{};
+            return x;
+        }
+    };
+    var list = S.get();
+    try expect(list.items.len == 0);
+}
diff --git a/test/behavior/packed-struct.zig b/test/behavior/packed-struct.zig
index 52083a492d..2dea485bf5 100644
--- a/test/behavior/packed-struct.zig
+++ b/test/behavior/packed-struct.zig
@@ -436,3 +436,25 @@ test "load pointer from packed struct" {
         try expect(i == 123);
     }
 }
+
+test "@ptrToInt on a packed struct field" {
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+
+    const S = struct {
+        const P = packed struct {
+            x: u8,
+            y: u8,
+            z: u32,
+        };
+        var p0: P = P{
+            .x = 1,
+            .y = 2,
+            .z = 0,
+        };
+    };
+    try expect(@ptrToInt(&S.p0.z) - @ptrToInt(&S.p0.x) == 2);
+}
diff --git a/test/behavior/union.zig b/test/behavior/union.zig
index 8e4b262565..2f6fa78f0c 100644
--- a/test/behavior/union.zig
+++ b/test/behavior/union.zig
@@ -1226,3 +1226,33 @@ test "extern union most-aligned field is smaller" {
     var a: ?U = .{ .un = [_]u8{0} ** 110 };
     try expect(a != null);
 }
+
+test "return an extern union from C calling convention" {
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+
+    const namespace = struct {
+        const S = extern struct {
+            x: c_int,
+        };
+        const U = extern union {
+            l: c_long,
+            d: f64,
+            s: S,
+        };
+
+        fn bar(arg_u: U) callconv(.C) U {
+            var u = arg_u;
+            return u;
+        }
+    };
+
+    var u: namespace.U = namespace.U{
+        .l = @as(c_long, 42),
+    };
+    u = namespace.bar(namespace.U{
+        .d = 4.0,
+    });
+    try expect(u.d == 4.0);
+}