1608774 - Crash in [@ neqo_http3::connection::Http3Connection<T>::check_connection_events<T>]

Status: RESOLVED FIXED

(Core :: Networking: HTTP, defect, P1)

Description

[Gabriele Svelto [:gsvelto]]

This bug is for crash report bp-527ddadf-3b96-48e3-b555-9d2340200110.

Top 10 frames of crashing thread:

0 xul.dll RustMozCrash mozglue/static/rust/wrappers.cpp:16
1 xul.dll mozglue_static::panic_hook mozglue/static/rust/lib.rs:89
2 xul.dll core::ops::function::Fn::call<fn src/libcore/ops/function.rs:227
3 xul.dll std::panicking::rust_panic_with_hook src/libstd/panicking.rs:477
4 xul.dll std::panicking::begin_panic<str*> src/libstd/panicking.rs:407
5 xul.dll neqo_http3::connection::Http3Connection<neqo_http3::client_events::Http3ClientEvents, neqo_http3::transaction_client::TransactionClient, neqo_http3::connection::Http3ClientHandler>::check_connection_events<neqo_http3::client_events::Http3ClientEvents, neqo_http3::transaction_client::TransactionClient, neqo_http3::connection::Http3ClientHandler> third_party/rust/neqo-http3/src/connection.rs
6 xul.dll neqo_http3::connection_client::Http3Client::process_http3 third_party/rust/neqo-http3/src/connection_client.rs
7 xul.dll mozilla::net::Http3Session::ProcessOutput netwerk/protocol/http/Http3Session.cpp:399
8 xul.dll mozilla::net::Http3Session::Process netwerk/protocol/http/Http3Session.cpp:363
9 xul.dll mozilla::net::nsHttpConnection::EnsureNPNCompleteHttp3 netwerk/protocol/http/nsHttpConnection.cpp:749

This is a very low-volume crash tripping on this assertion:

https://hg.mozilla.org/mozilla-central/annotate/374a48ce8690a53e44ef3f4134b8ecd8099bea14/third_party/rust/neqo-http3/src/connection.rs#l450

It's been going on for a while even though the volume is very low so it might be a valid issue, especially since the stacks are consistent across versions.

Comment 1

[Honza Bambas (:mayhemer)]

Andy, can you take a look?

Comment 2

[Dragana Damjanovic [:dragana]]

this is probably fixed by the neqo update. the update landed on 9th, last crashes are on 9th, but the nightly did not contain the update.
let's keep the bug open for a bit.

Comment 3

[Andy Grover [:grover]]

No more crashes in nightly after the 9th. (some in beta/release but they end Jan 19). I think this one is resolved.