[INFO] fetching crate strict_result 1.2.0...
[INFO] testing strict_result-1.2.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate strict_result 1.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate strict_result 1.2.0
[INFO] finished tweaking crates.io crate strict_result 1.2.0
[INFO] tweaked toml for crates.io crate strict_result 1.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate strict_result 1.2.0 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 strict_result 1.2.0 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b246fe9245a705da8c43876b234f7081165608fed1d2b1367ac525099ae03e9b
[INFO] running `Command { std: "docker" "start" "-a" "b246fe9245a705da8c43876b234f7081165608fed1d2b1367ac525099ae03e9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b246fe9245a705da8c43876b234f7081165608fed1d2b1367ac525099ae03e9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b246fe9245a705da8c43876b234f7081165608fed1d2b1367ac525099ae03e9b", kill_on_drop: false }`
[INFO] [stdout] b246fe9245a705da8c43876b234f7081165608fed1d2b1367ac525099ae03e9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 601ef6806425150e4dffe5d51d37f1fe85a140a7549f900f0e5c588b555d68c6
[INFO] running `Command { std: "docker" "start" "-a" "601ef6806425150e4dffe5d51d37f1fe85a140a7549f900f0e5c588b555d68c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling strict_result v1.2.0 (/opt/rustwide/workdir)
[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(try_trait_v2)]
[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 `strict_result` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "601ef6806425150e4dffe5d51d37f1fe85a140a7549f900f0e5c588b555d68c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "601ef6806425150e4dffe5d51d37f1fe85a140a7549f900f0e5c588b555d68c6", kill_on_drop: false }`
[INFO] [stdout] 601ef6806425150e4dffe5d51d37f1fe85a140a7549f900f0e5c588b555d68c6