Panic in mun build in certain situations with external functions

[Imberflur]

> mun build test.mun
mun: /usr/lib/libtinfo.so.5: no version information available (required by mun)
thread 'main' panicked at 'missing function value for hir function: 'foo'', <::std::macros::panic macros>:5:6

Looks like this panic

If either of the commented lines are used the panic does not occur.

extern fn foo();
extern fn bar();

pub fn two() {
    bar();
    //foo(); // works with this
    one(); // no effect with or without this
}

//pub fn fn_one() { // works with this
fn one() {
    bar();
    foo();
}

could be related to #221?

[baszalmstra]

I just added your example as a test case:

#[test]
fn issue_222() {
    test_snapshot(r#"
    extern fn foo();
    extern fn bar();

    pub fn two() {
        bar();
        //foo(); // works with this
        one(); // no effect with or without this
    }

    //pub fn fn_one() { // works with this
    fn one() {
        bar();
        foo();
    }
    "#)
}

in crates/mun_codegen/src/test.rs. I can verify that the fix in #221 fixes this issue. It fails on master.

[baszalmstra]

I can confirm that #221 fixed the issue. We'll backport this to v0.2 and publish a new version.

[baszalmstra]

#221 fixed this issue, it has also been backported to the release/v0.2 branch.