Checker error using unwrapped nested selector

[quaesitor-scientiam]

V version: V 0.4.9 5d1b90b, press to see full `v doctor` output

V full version	V 0.4.9 45fd7eb.5d1b90b
OS	windows, Microsoft Windows 11 Pro 26100 64-bit
Processor	24 cpus, 64bit, little endian, AMD Ryzen 9 5900X 12-Core Processor
Memory	77.96GB/127.92GB
V executable	S:\repo\vlang\v.exe
V last modified time	2025-01-18 17:17:11
V home dir	OK, value: S:\repo\vlang
VMODULES	OK, value: C:\Users\john3.vmodules
VTMP	OK, value: C:\Users\john3\AppData\Local\Temp\v_0
Current working dir	OK, value: S:\vProjects\testit
Git version	git version 2.45.1.windows.1
V git status	weekly.2025.1-107-g5d1b90b3 (4 commit(s) behind V master)
.git/config present	true
cc version	N/A
gcc version	gcc (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r2) 14.2.0
clang version	(built by Brecht Sanders, r2) clang version 19.1.1
msvc version	N/A
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	thirdparty-windows-amd64 b425ac82
emcc version	N/A
glibc version	N/A

What did you do?
./v -g -o vdbg cmd/v && ./vdbg -cg testit.v && S:\vProjects\testit\testit.exe

module main

import os {File, open_append, Process}

type Foo = string | int | f32 | File

struct Svc {
	mut:
	process ?Process
	log ?Foo
}
fn Svc.init(log ?Foo) Svc{
	mut svc := Svc{log: log}
	if svc.log != none {
		if svc.log is string {
			dump(svc.log)
			_ := open_append(svc.log) or {panic(err)}
		}
	}
	return svc
}

struct CSvc {
	Svc
	pub mut:
	log ?Foo
}
pub fn CSvc.init(log ?Foo) CSvc {
	mut c := CSvc{log: log}
	c.Svc = Svc.init(log)
	return c
}

fn main() {
	CSvc.init(none)
}

What did you see?

testit.v:17:21: error: cannot use `Foo` as `string` in argument 1 to `os.open_append`
   15 |         if svc.log is string {
   16 |             dump(svc.log)
   17 |             _ := open_append(svc.log) or {panic(err)}
      |                              ~~~~~~~
   18 |         }
   19 |     }

What did you expect to see?

Clean compile

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[huly-for-github]

Connected to Huly®: V_0.6-21948

[quaesitor-scientiam]

Connected to #23500

[spytheman]

The example from #23500 compiles with latest V.