bug overload operator when type is generic

[Ddiidev]

Describe the bug

Code: https://play.vlang.io/p/7bb26503ba

import time

struct SubTestTimeOptional[T] {
	iis string
	ext T
}

pub fn (s1 SubTestTimeOptional[T]) == (s2 SubTestTimeOptional[T]) bool {
	return s1.iis == s2.iis
}

struct TestTimeOptional {
	exp ?time.Time
}

fn now_optional[T]() SubTestTimeOptional[T] {
	return SubTestTimeOptional[TestTimeOptional] {
		iis: "asdadwq123"
		ext: TestTimeOptional{
			exp: time.now()
		}
	}
}

fn now_delay_optional[T]() SubTestTimeOptional[T] {
	return SubTestTimeOptional[T] {
		iis: "asdadwq123"
		ext: TestTimeOptional{
			exp: time.now().add_seconds(5)
		}
	}
}

mut  t1 := now_optional[TestTimeOptional]()
mut t2 := now_delay_optional[TestTimeOptional]()

assert t1 == t2

Reproduction Steps

▶️ play.vlang

Expected Behavior

result: true

Current Behavior

Output:

/tmp/v_60000/code.01HP9Z09B4N624H9AAX2RGCBNA.tmp.c:2574: warning: implicit declaration of function '_option_time__Time__eq'
tcc: error: undefined symbol '_option_time__Time__eq'
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

Exited with error status 1

Possible Solution

No response

Additional Information/Context

See that it reports that it is not defined compared to the optional Timer type.
But that's not the problem, since in my == operator overload I'm not using the exp ?time.Time field.

the original code is:

pub fn (s1 SubTestTimeOptional[T]) == (s2 SubTestTimeOptional[T]) bool {
	return s1.iis == s2.iis
}

If you change/add this section, everything works beautifully.

pub fn (s1 SubTestTimeOptional[TestTimeOptional]) == (s2 SubTestTimeOptional[TestTimeOptional]) bool {
	return s1.iis == s2.iis
}

V version

V 0.4.4 212adfa

Environment details (OS name and version, etc.)

V full version: V 0.4.4 212adfa
OS: linux, Debian GNU/Linux 11 (bullseye) (VM)
Processor: 1 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2686 v4 @ 2.30GHz

getwd: /home/admin/playground
vexe: /home/admin/v/v
vexe mtime: 2024-02-10 16:23:23

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

Git version: git version 2.30.2
Git vroot status: Error: fatal: detected dubious ownership in repository at '/home/admin/v'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v
.git/config present: true

CC version: cc (Debian 10.2.1-6) 10.2.1 20210110
thirdparty/tcc status: Error: fatal: detected dubious ownership in repository at '/home/admin/v/thirdparty/tcc'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v/thirdparty/tcc
 Error: fatal: detected dubious ownership in repository at '/home/admin/v/thirdparty/tcc'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v/thirdparty/tcc

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