rust/tests/ui/proc-macro/issue-76270-panic-in-libproc-macro.rs

// aux-build:proc-macro-panic.rs
// edition:2018
// needs-unwind proc macro panics to report errors

// Regression test for issue #76270
// Tests that we don't print an ICE message when a panic
// occurs in libproc-macro (when `-Z proc-macro-backtrace` is not specified)

extern crate proc_macro_panic;

proc_macro_panic::panic_in_libproc_macro!(); //~ ERROR proc macro panicked

fn main() {}