C error when comparing a Result returned from a function with none

[zeozeozeo]

V doctor:

V full version: V 0.4.4 5306469.e9320ad
OS: windows, Microsoft Windows 10 Pro v19045 64-bit
Processor: 20 cpus, 64bit, little endian, 

getwd: C:\Users\user\Desktop\Code\leaflang
vexe: C:\Users\user\Desktop\Code\v\v.exe
vexe mtime: 2024-02-02 13:06:41

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

Git version: git version 2.42.0.windows.1
Git vroot status: weekly.2024.05-13-ge9320add
.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 a39eb79b

What did you do?
v -g -o vdbg cmd/v && vdbg test.v

struct Foo {
	x int
}
struct Bar {
	x int
}
type Foobar = Foo | Bar
struct Foobars {
	m map[string]Foobar
}
fn (f &Foobars) find_foobar(name string) ?Foobar {
	return f.m[name] or { return none }
}
fn (mut f Foobars) is_known(name string) bool {
	return f.find_foobar(name) != none
}

fn main() {
	mut foobars := Foobars{
		m: map[string]Foobar{}
	}
	println(foobars.is_known('deadbeef'))
}

What did you expect to see?

false printed to stdout

What did you see instead?

==================
C:/Users/user/AppData/Local/Temp/v_0/test.01HNMYW988S2N72XV6W3GMC4VV.tmp.c:6906: warning: implicit declaration of function 'tcc_backtrace'
C:/Users/user/AppData/Local/Temp/v_0/test.01HNMYW988S2N72XV6W3GMC4VV.tmp.c:13069: error: expected struct or union but not 'struct main__Foobars *'
...
==================
(Use `v -cg` to print the entire error message)

builder error: 
==================
C error. This should never happen.

This is a compiler bug, please report it using `v bug file.v`.

https://github.com/vlang/v/issues/new/choose

You can also use #help on Discord: https://discord.gg/vlang

Relevant generated C code:

VV_LOCAL_SYMBOL bool main__Foobars_is_known(main__Foobars* f, string name) {
	main__Foobars_find_foobar(f, name);
	bool _t1 = f.find_foobar(name).state != 2; // here
	return _t1;
}

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