Confusing error message when test file get an invalid name

[Lathanao]

V doctor:

OS: linux, Ubuntu 22.04 LTS
Processor: 12 cpus, 64bit, little endian, Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
CC version: cc (Ubuntu 11.2.0-19ubuntu1) 11.2.0
V full version: V 0.3.0 0133ff2

What did you do?
I create a test on a module, so I need 3 files:

main.v, main file

module main

import custom

fn main() {}

custom/custom.v , in module custom, the main module file

module custom

custom/test_custom.v, in module custom

module custom

fn test_result() {
	println('whatever')
}

Then test the file:

v run "./custom/test_custom.v"

What did you expect to see?
A message explaining there is an error in the file name.

In this situation, the error message is not right, The project contains already a main module. And the message about "v -shared" is confusing.

What did you see instead?

test/redis/bugbug.v/custom/test_custom.v:1:1: error: project must include a `main` module or be a shared library (compile with `v -shared`)
    1 | module custom
      | ^
    2 | 
    3 | fn test_result() {