[INFO] fetching crate tp_ 0.3.1...
[INFO] testing tp_-0.3.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate tp_ 0.3.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tp_ 0.3.1
[INFO] finished tweaking crates.io crate tp_ 0.3.1
[INFO] tweaked toml for crates.io crate tp_ 0.3.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tp_ 0.3.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tp_ 0.3.1 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dfb57ef7d139e14525ecf1a1a3b6acf3cc1c9a771a0520193eae203aa59b9cc
[INFO] running `Command { std: "docker" "start" "-a" "3dfb57ef7d139e14525ecf1a1a3b6acf3cc1c9a771a0520193eae203aa59b9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dfb57ef7d139e14525ecf1a1a3b6acf3cc1c9a771a0520193eae203aa59b9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dfb57ef7d139e14525ecf1a1a3b6acf3cc1c9a771a0520193eae203aa59b9cc", kill_on_drop: false }`
[INFO] [stdout] 3dfb57ef7d139e14525ecf1a1a3b6acf3cc1c9a771a0520193eae203aa59b9cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40efff49613b61b701a7175d19b1ac9fc67e94b10c4d64f851496fea991a8083
[INFO] running `Command { std: "docker" "start" "-a" "40efff49613b61b701a7175d19b1ac9fc67e94b10c4d64f851496fea991a8083", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.54
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling os_str_bytes v6.5.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling mylibrary_ v1.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]    Compiling clap v3.2.23
[INFO] [stderr]    Compiling tp_ v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(if_let_guard)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tp_` (bin "tp_") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "40efff49613b61b701a7175d19b1ac9fc67e94b10c4d64f851496fea991a8083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40efff49613b61b701a7175d19b1ac9fc67e94b10c4d64f851496fea991a8083", kill_on_drop: false }`
[INFO] [stdout] 40efff49613b61b701a7175d19b1ac9fc67e94b10c4d64f851496fea991a8083