empty interface value is error in multiple match

[kitech]

Describe the bug

Code: https://play.vlang.io/p/25f365b81b

interface  Number2  {}

fn t(v  Number2) {

	match v {
		int, i32, isize, i64 {
			x := isize(v)
			println(x)
		}
		else{}
	}
	
}
t(int(42))

Reproduction Steps

run playground

Expected Behavior

out should be:
42

Current Behavior

Output:

22645727616992

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.8 a40df55

Environment details (OS name and version, etc.)

V full version: V 0.4.8 a40df55
OS: linux, Debian GNU/Linux 12 (bookworm) (VM)
Processor: 2 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz

getwd: /home/admin/playground
vexe: /home/admin/v/v
vexe mtime: 2024-12-04 01:25:28

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

Git version: git version 2.39.5
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 12.2.0-14) 12.2.0
emcc version: N/A
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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_{Huly®: V_0.6-21500}

[jorgeluismireles]

Yes, is the empty interface because a sum type like type Number2 = int | string has no this problem. Seems the problem is the x := isize(v) line which takes a "random address" different every time you run the code:

interface Number2 {}

fn t(v Number2) {
	match v {
		int {
			x := isize(v) // 'random-address'
			println('${v} ${isize(v)} ${x}') // 42 42 'random-address'
		}
		else{}
	}
}
t(42)