rustsym can give wrong results because it doesn't run macros

[mcclure]

The problem

So I've got this small project (can provide you a git repo if it helps) that uses the "mlua" crate. I have a file with this code:

use mlua::Lua;
use mlua::prelude::{LuaResult, LuaTable};

fn func1(_: &Lua, _: ()) -> LuaResult<()> {
    Ok(())
}

fn func2(_: &Lua, _: ()) -> LuaResult<()> {
    Ok(())
}

#[mlua::lua_module]
pub fn module(lua: &Lua) -> LuaResult<LuaTable> {
    lua.create_table_from(vec![
        ("func1", lua.create_function(func1)?),
        ("func2", lua.create_function(func2)?),
    ])
}

Now, I have a problem: I want to use this "module" function in another file. But see that #[mlua::lua_module]? That's a macro the mlua crate publishes, and it actually changes the name (and visibility) of the function it is attached to. It turns out it changes it to luaopen_module. But I didn't know that, so I installed rustsym.

So I run rustsym and:

Cool, so there's an exported function named "module".

Except no:

Eventually I figure out I can also use cargo doc --open for this purpose. Here's what it says exists:

Expected behavior

I think rustsym gave the incorrect name for luaopen_module because it doesn't run macros, whereas cargo doc --open gave the correct name because it did. Ideally rustsym should run macros.