Wrong receiver generic resolution on method call

[zuosixiaoxiongmao]

Describe the bug

field not found: NetworkServerSystemUdp

Reproduction Steps

pub type Entity = u64
type ComponentType = u16

pub struct Context {
pub mut:
        ecs &Ecs
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
pub struct EntityManager {
mut:
        living_entity_count u64
}

fn (mut self EntityManager) create_entity() Entity {
        entity := self.living_entity_count
        self.living_entity_count++
        return entity
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

pub interface ISystem {
        ecs &Ecs
mut:
        init()
}

pub struct System {
pub mut:
        ecs &Ecs
}

pub fn (mut self System) init() {
}

pub struct SystemManager {
mut:
        system_array map[string]ISystem = {}
}

fn (mut self SystemManager) add_system[T]() &T {
        mut t := T{}
        self.system_array[typeof[T]().name] = t
        return &t
}

////////////////////////////////////////////////////////////////////////////

@[heap]
pub struct Ecs {
mut:
        entity_manager EntityManager
        system_manager SystemManager
pub mut:
        root_entity Entity
}

pub fn Ecs.new() &Ecs {
        mut ecs := &Ecs{}
        ecs.root_entity = ecs.create_entity()
        return ecs
}

pub fn (mut self Ecs) create_entity() Entity {
        return self.entity_manager.create_entity()
}

pub fn (mut self Ecs) add_system[T]() {
        mut system := self.system_manager.add_system[T]()
        system.ecs = &self
        system.init()
}

////////////////////////////////////////////////////////////////////////////////////////////////////////

struct NetworkUdpServerComponent {
}

struct NetworkServerSystemUdp {
        System
}

pub struct ConfigSystem {
        System
}

struct NetworkServerSystemUdpExt {
        NetworkServerSystemUdp
}

fn main() {
        mut ecs := Ecs.new()
        mut root_entity := ecs.create_entity()

        ecs.add_system[ConfigSystem]()
        ecs.add_system[NetworkServerSystemUdpExt]()

        // or
        // ecs.add_system<NetworkServerSystemUdpExt>()
        // ecs.add_system<ConfigSystem>()
}

Expected Behavior

build success

Current Behavior

builder error

Possible Solution

No response

Additional Information/Context

copy the code to lab.v file, and v ./lab.v. It will build error.

V version

0.4.6 1571645

Environment details (OS name and version, etc.)

windows

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[JalonSolov]

Compiling with -g options shows this:

/tmp/v_1000/../../../../../../home/jalon/lab.v:72: error: field not found: NetworkServerSystemUdp