Simple V file with arguments() function not compiling

[tricarte]

Describe the bug

Just wanted to test the arguments()' method in the builtin` module. But the compiler gives error.

Reproduction Steps

Create a new V project called 'arguments':

v init arguments

Use below as the content of main.v:

module main

fn main() {
	args := arguments()
	println(args)
}

Try to compile the program:

v -prod . # or 'v .'

Expected Behavior

Program should compile without error.

Current Behavior

This is the output of v -show-c-output -prod .

======== Output of the C Compiler (cc) ========
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c: In function ‘strings__new_builder’:
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1314:34: warning: implicit declaration of function ‘__new_array_with_default_noscan’ [-Wimplicit-function-declaration]
 1314 |         strings__Builder res = ((__new_array_with_default_noscan(0, initial_size, sizeof(u8), 0)));
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1314:32: error: invalid initializer
 1314 |         strings__Builder res = ((__new_array_with_default_noscan(0, initial_size, sizeof(u8), 0)));
      |                                ^
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c: In function ‘strings__Builder_write_u8’:
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1319:9: warning: implicit declaration of function ‘array_push_noscan’; did you mean ‘array_push_many’? [-Wimplicit-function-declaration]
 1319 |         array_push_noscan((array*)b, _MOV((u8[]){ data }));
      |         ^~~~~~~~~~~~~~~~~
      |         array_push_many
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c: In function ‘arguments’:
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1966:28: warning: implicit declaration of function ‘__new_array_with_default’ [-Wimplicit-function-declaration]
 1966 |         Array_string res = __new_array_with_default(0, g_main_argc, sizeof(string), 0);
      |                            ^~~~~~~~~~~~~~~~~~~~~~~~
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1966:28: error: invalid initializer
/tmp/v_1000/arguments.01JHAVW7NT6P8BN64Y1QQ58RHG.tmp.c:1973:25: warning: implicit declaration of function ‘array_push’ [-Wimplicit-function-declaration]
 1973 |                         array_push((array*)&res, _MOV((string[]){ tos_clone(argv[i]) }));
      |                         ^~~~~~~~~~
===============================================

Possible Solution

No response

Additional Information/Context

No response

V version

0.4.9 bed28d1

Environment details (OS name and version, etc.)

|V full version      |V 0.4.9 e61475e.bed28d1
|:-------------------|:-------------------
|OS                  |linux, Ubuntu 24.04.1 LTS
|Processor           |4 cpus, 64bit, little endian, Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
|Memory              |0.23GB/3.7GB
|                    |
|V executable        |/home/user/repos/v/v
|V last modified time|2025-01-11 13:54:08
|                    |
|V home dir          |OK, value: /home/user/repos/v
|VMODULES            |OK, value: /home/user/.vmodules
|VTMP                |OK, value: /tmp/v_1000
|Current working dir |OK, value: /home/user/repos/v
|                    |
|Git version         |git version 2.43.0
|V git status        |weekly.2025.1-29-gbed28d1e
|.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
|emcc version        |N/A
|glibc version       |ldd (Ubuntu GLIBC 2.39-0ubuntu8.3) 2.39

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[JalonSolov]

Same program, in a differently named directory, with the code in a file named x.v (to make sure that wasn't part of the problem), and run with v -g run x.v gives:

/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/strings/builder.c.v:14: warning: implicit declaration of function '__new_array_with_default_noscan'
/tmp/v_1000/../../../../../../home/jalon/git/v/vlib/strings/builder.c.v:14: error: '{' expected (got ";")
builder error: 
==================
...

[felipensp]

As a temporary workaround use -no-skip-unused param to v.

[JalonSolov]

Confirmed - that makes it work as expected:

$ v -g -no-skip-unused run x.v
['/home/jalon/x']
$