[INFO] fetching crate livetex 0.3.0...
[INFO] testing livetex-0.3.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate livetex 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate livetex 0.3.0
[INFO] finished tweaking crates.io crate livetex 0.3.0
[INFO] tweaked toml for crates.io crate livetex 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate livetex 0.3.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate livetex 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86f6cc5361e8d52059d58ca0590f54368909af020ff7a42de9a06b0f2d41c499
[INFO] running `Command { std: "docker" "start" "-a" "86f6cc5361e8d52059d58ca0590f54368909af020ff7a42de9a06b0f2d41c499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86f6cc5361e8d52059d58ca0590f54368909af020ff7a42de9a06b0f2d41c499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86f6cc5361e8d52059d58ca0590f54368909af020ff7a42de9a06b0f2d41c499", kill_on_drop: false }`
[INFO] [stdout] 86f6cc5361e8d52059d58ca0590f54368909af020ff7a42de9a06b0f2d41c499
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 998c4a63c5bd7443bc9c8935479ca11f5e77a0327dffb6a845c59fb0c535740d
[INFO] running `Command { std: "docker" "start" "-a" "998c4a63c5bd7443bc9c8935479ca11f5e77a0327dffb6a845c59fb0c535740d", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling bytes v1.9.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling httparse v1.9.5
[INFO] [stderr]    Compiling indexmap v2.7.0
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling serde_json v1.0.135
[INFO] [stderr]    Compiling clap_builder v4.5.26
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling temp-dir v0.1.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling env_logger v0.11.6
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling http v1.2.0
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling http-body-util v0.1.2
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling lazy-regex-proc_macros v3.4.1
[INFO] [stderr]    Compiling clap_derive v4.5.24
[INFO] [stderr]    Compiling tokio v1.43.0
[INFO] [stderr]    Compiling lazy-regex v3.4.1
[INFO] [stderr]    Compiling clap v4.5.26
[INFO] [stderr]    Compiling tokio-util v0.7.13
[INFO] [stderr]    Compiling h2 v0.4.7
[INFO] [stderr]    Compiling hyper v1.5.2
[INFO] [stderr]    Compiling hyper-util v0.1.10
[INFO] [stderr]    Compiling livetex v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/tex_monitor.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |         if let Some(out_path) = out_path && pdf_path.exists() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::temp_dir`
[INFO] [stdout]  --> src/tex_monitor.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::env::temp_dir;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::OsStr`
[INFO] [stdout]  --> src/tex_monitor.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ffi::OsStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/tex_monitor.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/tex_monitor.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SystemTime`
[INFO] [stdout]   --> src/tex_monitor.rs:12:27
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::time::{Duration, SystemTime};
[INFO] [stdout]    |                           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ARGS_SHARED`
[INFO] [stdout]  --> src/server.rs:2:25
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{mutex_lock, ARGS_SHARED, COMPILED_PATH};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `header`
[INFO] [stdout]  --> src/server.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 | use hyper::{header, Method, Request, Response, StatusCode};
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `livetex` (lib) due to 4 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "998c4a63c5bd7443bc9c8935479ca11f5e77a0327dffb6a845c59fb0c535740d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "998c4a63c5bd7443bc9c8935479ca11f5e77a0327dffb6a845c59fb0c535740d", kill_on_drop: false }`
[INFO] [stdout] 998c4a63c5bd7443bc9c8935479ca11f5e77a0327dffb6a845c59fb0c535740d