Function rustdoc::passes::collect_intra_doc_links::ambiguity_error

fn ambiguity_error(
    cx: &DocContext<'_>, 
    item: &Item, 
    path_str: &str, 
    dox: &str, 
    link_range: Range<usize>, 
    candidates: Vec<Res>
)

Report an ambiguity error, where there were multiple possible resolutions.