#[cfg(test)]
 mod tests {
     use crate::id::{with_task_id_mapping, IdMapping, TaskId};

     struct IdentIdMapping<'a>(&'a usize);
     impl<'a> IdMapping<TaskId> for IdentIdMapping<'a> {
         fn forward(&self, _id: TaskId) -> usize {
             self.0 + 1
         }
         fn backward(&self, id: usize) -> TaskId {
             id.into()
         }
     }

     #[test]
     fn with_task_id_mapping_panic() {
         let _ = std::panic::catch_unwind(|| {
             let tid = 5;
             let m = IdentIdMapping(&tid);
             with_task_id_mapping(m, || panic!("with_task_id_mapping_panic"))
         });
         let tid: TaskId = 4.into();
         println!("{:?}", serde_json::to_string(&tid));
     }
 }

test id::tests::with_task_id_mapping_panic ... error: Undefined Behavior: constructing invalid value: encountered a dangling reference (use-after-free)
   --> crates/turbo-tasks/src/id.rs:237:13
    |
237 |             self.0 + 1
    |             ^^^^^^ constructing invalid value: encountered a dangling reference (use-after-free)
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
    = note: inside `<id::tests::IdentIdMapping as id::IdMapping<id::TaskId>>::forward` at crates/turbo-tasks/src/id.rs:237:13
note: inside closure at crates/turbo-tasks/src/id.rs:187:17
   --> crates/turbo-tasks/src/id.rs:187:17
    |
187 |                 mapping.forward(*self)
    |                 ^^^^^^^^^^^^^^^^^^^^^^
    = note: inside `std::thread::LocalKey::<std::cell::RefCell<std::option::Option<std::boxed::Box<dyn id::IdMapping<id::TaskId>>>>>::try_with::<[closure@crates/turbo-tasks/src/id.rs:185:30: 185:36], std::result::Result<(), serde_json::Error>>` at /Users/bdbai/.rustup/toolchains/nightly-2022-09-23-x86_64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/local.rs:445:16
    = note: inside `std::thread::LocalKey::<std::cell::RefCell<std::option::Option<std::boxed::Box<dyn id::IdMapping<id::TaskId>>>>>::with::<[closure@crates/turbo-tasks/src/id.rs:185:30: 185:36], std::result::Result<(), serde_json::Error>>` at /Users/bdbai/.rustup/toolchains/nightly-2022-09-23-x86_64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/local.rs:421:9
note: inside `<id::TaskId as backend::_::_serde::Serialize>::serialize::<&mut serde_json::Serializer<&mut std::vec::Vec<u8>>>` at crates/turbo-tasks/src/id.rs:185:9
   --> crates/turbo-tasks/src/id.rs:185:9
    |
185 | /         TASK_ID_MAPPING.with(|cell| {
186 | |             let mapped_id = if let Some(mapping) = cell.borrow().as_ref() {
187 | |                 mapping.forward(*self)
188 | |             } else {
...   |
191 | |             serializer.serialize_u64(mapped_id as u64)
192 | |         })
    | |__________^
    = note: inside `serde_json::to_writer::<&mut std::vec::Vec<u8>, id::TaskId>` at /Users/bdbai/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.85/src/ser.rs:2155:10
    = note: inside `serde_json::to_vec::<id::TaskId>` at /Users/bdbai/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.85/src/ser.rs:2190:10
    = note: inside `serde_json::to_string::<id::TaskId>` at /Users/bdbai/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.85/src/ser.rs:2221:20
note: inside `id::tests::with_task_id_mapping_panic` at crates/turbo-tasks/src/id.rs:252:26
   --> crates/turbo-tasks/src/id.rs:252:26
    |
252 |         println!("{:?}", serde_json::to_string(&tid));
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: inside closure at crates/turbo-tasks/src/id.rs:245:5
   --> crates/turbo-tasks/src/id.rs:245:5
    |
244 |       #[test]
    |       ------- in this procedural macro expansion
245 | /     fn with_task_id_mapping_panic() {
246 | |         let _ = std::panic::catch_unwind(|| {
247 | |             let tid = 5;
248 | |             let m = IdentIdMapping(&tid);
...   |
252 | |         println!("{:?}", serde_json::to_string(&tid));
253 | |     }
    | |_____^
    = note: this error originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to previous error; 1 warning emitted

error: test failed, to rerun pass `-p turbo-tasks --lib`