[INFO] fetching crate transparent 0.3.1...
[INFO] testing transparent-0.3.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate transparent 0.3.1 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate transparent 0.3.1 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate transparent 0.3.1
[INFO] finished tweaking crates.io crate transparent 0.3.1
[INFO] tweaked toml for crates.io crate transparent 0.3.1 written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate crates.io crate transparent 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded path-dedot v3.0.14
[INFO] [stderr]   Downloaded cargo-emit v0.2.1
[INFO] [stderr]   Downloaded delegate v0.6.1
[INFO] [stderr]   Downloaded build-target v0.3.1
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.14
[INFO] [stderr]   Downloaded path-absolutize v3.0.11
[INFO] [stderr]   Downloaded gitignore v1.0.7
[INFO] [stderr]   Downloaded proc-macro2 v1.0.30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5964e43ee84342da6ab4baff7523b7e8092136debdc40aec05f4d358d121b8f3
[INFO] running `Command { std: "docker" "start" "-a" "5964e43ee84342da6ab4baff7523b7e8092136debdc40aec05f4d358d121b8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5964e43ee84342da6ab4baff7523b7e8092136debdc40aec05f4d358d121b8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5964e43ee84342da6ab4baff7523b7e8092136debdc40aec05f4d358d121b8f3", kill_on_drop: false }`
[INFO] [stdout] 5964e43ee84342da6ab4baff7523b7e8092136debdc40aec05f4d358d121b8f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8275fb27d6c82d97f8a64d626aa621d94c0eafb111ab789dab1e21d50f6114e
[INFO] running `Command { std: "docker" "start" "-a" "b8275fb27d6c82d97f8a64d626aa621d94c0eafb111ab789dab1e21d50f6114e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling transparent v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> build.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exit_status_error, path_try_exists)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> build.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exit_status_error, path_try_exists)]
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `transparent` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b8275fb27d6c82d97f8a64d626aa621d94c0eafb111ab789dab1e21d50f6114e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8275fb27d6c82d97f8a64d626aa621d94c0eafb111ab789dab1e21d50f6114e", kill_on_drop: false }`
[INFO] [stdout] b8275fb27d6c82d97f8a64d626aa621d94c0eafb111ab789dab1e21d50f6114e