Build succeeds silently when exporting methods with duplicate names

[FlyCloudC]

Bug Report

Environment

OS

Operating System: Windows

MoonBit CLI Tools Version

moon 0.1.20250121 (a825806 2025-01-21) ~\.moon\bin\moon.exe
moonc v0.1.20250121+7fc3467ab ~\.moon\bin\moonc.exe
moonrun 0.1.20250121 (a825806 2025-01-21) ~\.moon\bin\moonrun.exe

Steps to Reproduce

top.mbt :

///|
pub type A Int

///|
pub type B Int

///|
pub fn A::from_int(x : Int) -> A {
  A(x)
}

///|
pub fn B::from_int(x : Int) -> B {
  B(x)
}

mod.pkg.json:

{
    "link": {
        "js": {
            "exports": [
                "from_int"
            ]
        }
    }
}

run moon build --target=js

Expected Behavior

Throw an error to remind that there is a duplicate name.

Actual Behavior

Build succeeds. target/js/release/project1.js:

function username$project1$$A$from_int(x) {
  return x;
}
function username$project1$$B$from_int(x) {
  return x;
}
export { username$project1$$A$from_int as from_int, username$project1$$B$from_int as from_int }

Checklist

• (Optional) My case is minimal enough to be reproducible.

[FlyCloudC]

In addition, I'd like to ask if a feature to "export only A::from_int" will be provided.

[Young-Flash]

cc @Guest0x0