C builderr with interfaces that have option fields and embedded structs that implement the interface

[islonely]

Describe the bug

An interface that has an option field generates a C error when a struct which embeds another struct that implements the interface tries to access the option field.

Reproduction Steps

import time

interface InterfaceObject {
mut:
	duration ?time.Duration
	update()
}

struct Object {
mut:
	duration ?time.Duration
}

fn (mut obj Object) update() {
	duration := obj.duration or { time.second }
	println(duration)
}

struct FooObject {
	Object
}

fn (mut obj FooObject) update() {
	duration := obj.duration or { time.millisecond * 500 }
	println(duration)
}

fn main() {
	mut object := InterfaceObject(FooObject{})
	println(object)
}

Expected Behavior

Expected code to compile and print the object.

Current Behavior

C error:

C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:519: warning: WINVER redefined
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:7361: warning: implicit declaration of function 'tcc_backtrace'
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15044: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15050: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15056: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15064: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15090: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15090: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15110: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15112: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15112: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15132: warning: assignment from incompatible pointer type
C:/Users/imado/AppData/Local/Temp/v_0/test.16517445185759149149.tmp.c:15313: error: field not found: duration
builder error: 
==================
C error. This should never happen.

Possible Solution

No response

Additional Information/Context

No response

V version

V full version: V 0.4.1 68cbf27.3fab321

Environment details (OS name and version, etc.)

OS: windows, Microsoft Windows 11 Pro v22621 64-bit
Processor: 16 cpus, 64bit, little endian, 

getwd: C:\Users\imado\Documents\cyberian_tiger
vexe: C:\Users\imado\v\v.exe
vexe mtime: 2023-09-23 02:25:12

vroot: OK, value: C:\Users\imado\v
VMODULES: OK, value: C:\Users\imado\.vmodules
VTMP: OK, value: C:\Users\imado\AppData\Local\Temp\v_0

Git version: git version 2.33.1.windows.1
Git vroot status: weekly.2023.38-24-g3fab3213
.git/config present: true

CC version: Error: 'cc' is not recognized as an internal or external command,
operable program or batch file.

thirdparty/tcc status: thirdparty-windows-amd64 e90c2620

Important

You can vote for this issue using the 👍 reaction. More votes increase the issue's priority
for developers.

Take into account that only the 👍 reaction counts as a vote.
Only reactions to the issue itself will be counted as votes, not comments.