[INFO] cloning repository https://github.com/PixarV/rust_first_pain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PixarV/rust_first_pain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPixarV%2Frust_first_pain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPixarV%2Frust_first_pain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10b8e77a8d4fa668fee177100b7b1a0312792952
[INFO] testing PixarV/rust_first_pain against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPixarV%2Frust_first_pain" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PixarV/rust_first_pain on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PixarV/rust_first_pain
[INFO] disabled cargo feature 'default-run' from git repo https://github.com/PixarV/rust_first_pain
[INFO] finished tweaking git repo https://github.com/PixarV/rust_first_pain
[INFO] tweaked toml for git repo https://github.com/PixarV/rust_first_pain written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/PixarV/rust_first_pain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b51b4ead1000a38b79165b083ccb4bc395aaca7629b9c729e0e4caab3c41c1aa
[INFO] running `Command { std: "docker" "start" "-a" "b51b4ead1000a38b79165b083ccb4bc395aaca7629b9c729e0e4caab3c41c1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b51b4ead1000a38b79165b083ccb4bc395aaca7629b9c729e0e4caab3c41c1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b51b4ead1000a38b79165b083ccb4bc395aaca7629b9c729e0e4caab3c41c1aa", kill_on_drop: false }`
[INFO] [stdout] b51b4ead1000a38b79165b083ccb4bc395aaca7629b9c729e0e4caab3c41c1aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e30c301aa70cd16b7b758a373e9ad5e320b5491c7f58d0c0aeec63d3d38712e6
[INFO] running `Command { std: "docker" "start" "-a" "e30c301aa70cd16b7b758a373e9ad5e320b5491c7f58d0c0aeec63d3d38712e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling text_io v0.1.7
[INFO] [stderr]    Compiling first_project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lab3/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(no_panic_pow)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `first_project` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e30c301aa70cd16b7b758a373e9ad5e320b5491c7f58d0c0aeec63d3d38712e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e30c301aa70cd16b7b758a373e9ad5e320b5491c7f58d0c0aeec63d3d38712e6", kill_on_drop: false }`
[INFO] [stdout] e30c301aa70cd16b7b758a373e9ad5e320b5491c7f58d0c0aeec63d3d38712e6