rust/tests/ui/proc-macro/issue-59191-replace-root-with-fn.rs

// Test that using a macro to replace the entire crate tree with a non-'mod' item errors out nicely.
// `issue_59191::no_main` replaces whatever's passed in with `fn main() {}`.

// edition:2018
// aux-crate:issue_59191=issue-59191.rs
// error-pattern: requires `sized` lang_item

#![feature(custom_inner_attributes)]
#![issue_59191::no_main]
#![issue_59191::no_main]