struct comptime and generic array bug

[kbkpbot]

Describe the bug

struct comptime and generic array can create bug.

Reproduction Steps

g.v

module main
struct MyStruct {
        f_array_string []string
        f_array_int    []int
        f_array_u8     []u8
}

fn arrarr[T](x []T) {
        $if T is $string {
                println('arrarr string => ${x}')
        } $else $if T is u8 {
                println('arrarr u8  => ${x}')
        } $else $if T is $int {
                println('arrarr int  => ${x}')
        } $else {
                println('arrarr unknown  => ${x}')
        }
}

fn main() {
        x := MyStruct{
                f_array_int:    [10244]
                f_array_u8:     [u8(13)]
                f_array_string: ['hello', 'world']
        }

       // use comptime will create wrong output
        $for f in MyStruct.fields {
                arrarr(x.$(f.name))
        }

       // correct output
        arrarr(x.f_array_string)
        arrarr(x.f_array_int)
        arrarr(x.f_array_u8)
}

v g.v

Expected Behavior

arrarr string => ['hello', 'world']
arrarr int  => [10244]
arrarr u8  => [13]
arrarr string => ['hello', 'world']
arrarr int  => [10244]
arrarr u8  => [13]

Current Behavior

arrarr u8  => [213, 219]
arrarr u8  => [4]
arrarr u8  => [13]
arrarr string => ['hello', 'world']
arrarr int  => [10244]
arrarr u8  => [13]

Possible Solution

No response

Additional Information/Context

Not sure it is a comptime bug or a generic bug.

V version

V 0.4.9 bd2ec67.bd2ec67

Environment details (OS name and version, etc.)

V full version	V 0.4.9 bd2ec67.bd2ec67
OS	linux, Ubuntu 24.04.2 LTS
Processor	8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz
Memory	5.68GB/15.51GB
V executable	/media/HD/github/kbkpbot/v/v
V last modified time	2025-03-18 02:26:51
V home dir	OK, value: /media/HD/github/kbkpbot/v
VMODULES	OK, value: /home/mars/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/mars/v/bug
Git version	git version 2.43.0
V git status	weekly.2025.11-53-gbd2ec679
.git/config present	true
cc version	cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
gcc version	gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
clang version	Ubuntu clang version 18.1.3 (1ubuntu1)
tcc version	tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 0134e9b9-dirty
emcc version	N/A
glibc version	ldd (Ubuntu GLIBC 2.39-0ubuntu8.4) 2.39

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