fn return fixed array may cause wrong result

[kbkpbot]

Describe the bug

fn return fixed array may cause wrong result.

It may related to issue #25928

Reproduction Steps

f.v

module main

fn ret() [2]int {
        return [3, 4]!
}

fn main() {
        coords := [ret()]
        dump(coords)
}

Expected Behavior

it should output:

[[3,4]]

Current Behavior

$ v run f.v
[f.v:9] coords: [[1934389584, 0]]

and the value is random every time.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.12 967a4a2

Environment details (OS name and version, etc.)

V full version	V 0.4.12 967a4a2
OS	linux, Ubuntu 24.04.3 LTS
Processor	8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz
Memory	11.76GB/15.51GB
V executable	/media/HD/github/kbkpbot/v/v
V last modified time	2025-12-13 04:45:49
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/map
Git version	git version 2.43.0
V git status	weekly.2025.46-178-g967a4a2d
.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 2025-02-13 HEAD@f8bd136d (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 696c1d84
emcc version	N/A
glibc version	ldd (Ubuntu GLIBC 2.39-0ubuntu8.6) 2.39

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[kbkpbot]

compile with clang, will cause compiler error:

$ v f.v -cc clang
================== C compilation error (from clang): ==============
cc: /tmp/v_1000/f.01KCB1AQC2SNA65FGWV6PW7DHG.tmp.c:5749:135: error: incompatible pointer to integer conversion initializing 'int' with an expression of type 'int[2]' [-Wint-conversion]
cc:  5749 |         Array_Array_fixed_int_2 coords = builtin__new_array_from_c_array_noscan(1, 1, sizeof(Array_fixed_int_2), _MOV((Array_fixed_int_2[1]){main__ret().ret_arr}));
cc:       |                                                                                                                                              ^~~~~~~~~~~~~~~~~~~
cc: 1 error generated.
===================================================================
Try passing `-g` when compiling, to see a .v file:line information, that correlates more with the C error.
(Alternatively, pass `-show-c-output`, to print the full C error message).
builder error:
==================
C error found. It should never happen, when compiling pure V code.
This is a V compiler bug, please report it using `v bug file.v`,
or goto https://github.com/vlang/v/issues/new/choose .
You can also use #help on Discord: https://discord.gg/vlang .