Wrong warning "reference field must be initialized" when directly initialize embedded struct

[i582]

Describe the bug

Code: https://vosca.dev/p/8e06c54374

struct Embedded {
	a &int
}

fn new_embedded() Embedded {
	return Embedded{
		a: unsafe { nil }
	}
}

struct Outer {
	Embedded
}

fn main() {
	o := Outer{
		Embedded: new_embedded()
	}
	println(o)
}

Expected Behavior

No warnings

Current Behavior

Output:

code.v:16:7: warning: reference field `Outer.a` must be initialized
   14 | 
   15 | fn main() {
   16 |     o := Outer{
      |          ~~~~~~
   17 |         Embedded: new_embedded()
   18 |     }
code.v:16:7: warning: reference field `Embedded.a` must be initialized
   14 | 
   15 | fn main() {
   16 |     o := Outer{
      |          ~~~~~~
   17 |         Embedded: new_embedded()
   18 |     }

Reproduction Steps

Run code above

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.3.4 fc4c431.45f16a2

Environment details (OS name and version, etc.)

V full version: V 0.3.4 fc4c431.bcd5c91
OS: linux, Ubuntu 22.04.2 LTS
Processor: 2 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz

getwd: /home/pmakhnev/playground
vexe: /home/pmakhnev/v/v
vexe mtime: 2023-06-08 00:00:08

vroot: OK, value: /home/pmakhnev/v
VMODULES: OK, value: /root/.vmodules
VTMP: OK, value: /tmp/v_0

Git version: git version 2.34.1
Git vroot status: weekly.2023.22-32-gbcd5c91b
.git/config present: true

CC version: cc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3