Assertion error at startup

[banool]

Repro

Get repo, checkout appropriate branch:

git clone [email protected]:aptos-labs/aptos-core.git
git switch banool/dhat_test

Run this command:

cargo run --release -p aptos -- node run-local-testnet --force-restart --config-path /tmp/yes_api.yaml --assume-yes

Output: https://gist.github.com/banool/a3aa22bfcf9154c15bc2073306d4fe9c.

This error does not occur with the default allocator / jemalloc.

Details:

• Rust 1.64
• MacOS 12.6
• CPU arch: ARM (M1 mac)

[banool]

Sometimes this error also manifests as a segfault (Bus Error: 10 or Segmentation fault: 11).

[banool]

Other times it just hangs on startup, without the process ever coming fully alive (in this case, the API never starts listening).

[nnethercote]

Hi, thanks for the report. Can you try the new 0.3.2 release and see if that fixes it? It has a bugfix for a problem that sounds similar to yours.

[banool]

Hey, new errors now:

fatal runtime error: assertion failed: thread_info.is_none()
Abort trap: 6

The program I'm using this with uses tokio btw.

[afajl]

Get the same error on Rust 1.65 on x86 Mac

[garypen]

This is an odd one: I've seen it my M1 Mac as well and the source of the message is almost certainly this.

That implies that something is trying to update information associated with a thread, but the thread already has associated information, so it asserts and fails.

I can't reproduce it reliably. I've only seen it happen a handful of times in the last couple of months. AFAICT, that code only runs during thread creation, so I'm not sure why it's being triggered.

I don't think this helps much, but maybe it points a way to investigate what is happening.

[antifuchs]

Can repro on 0.3.2 on an M1, macOS 13.1, rust 1.66.0. It triggers for me when I run cargo test, and then about 4 out of 10 times.

That it's reproducible on x86 probably rules out my pet theory, which would be that it's related to time resolution on apple silicon.

[Boshen]

Running tokio after dhat should fix this problem:

fn main() {
    //#[cfg(feature = "dhat-heap")]
    let _profiler = dhat::Profiler::new_heap();

    main2();
}

#[tokio::main]
async fn main2() {
    println!("Hello, world!");
}

Unfortunately I can't figure out where the rabbit hole is 😞