[INFO] fetching crate wxf-converter 0.3.0...
[INFO] testing wxf-converter-0.3.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate wxf-converter 0.3.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate wxf-converter 0.3.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wxf-converter 0.3.0
[INFO] finished tweaking crates.io crate wxf-converter 0.3.0
[INFO] tweaked toml for crates.io crate wxf-converter 0.3.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate wxf-converter 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wolfram_wxf v0.2.2
[INFO] [stderr]   Downloaded serde-pickle v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56a145f0995d8e7114aedf9753341c44b108d9178f8f65187e00107a97bcecde
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "56a145f0995d8e7114aedf9753341c44b108d9178f8f65187e00107a97bcecde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56a145f0995d8e7114aedf9753341c44b108d9178f8f65187e00107a97bcecde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56a145f0995d8e7114aedf9753341c44b108d9178f8f65187e00107a97bcecde", kill_on_drop: false }`
[INFO] [stdout] 56a145f0995d8e7114aedf9753341c44b108d9178f8f65187e00107a97bcecde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cd50abb538de72643ef1bd8b57b98e76675959522e086612895e0e2ab623e189
[INFO] running `Command { std: "docker" "start" "-a" "cd50abb538de72643ef1bd8b57b98e76675959522e086612895e0e2ab623e189", kill_on_drop: false }`
[INFO] [stderr]    Compiling iter-read v0.2.1
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling clap v2.27.1
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling serde-pickle v0.6.0
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling wolfram_wxf v0.2.2
[INFO] [stderr]    Compiling wxf-converter v0.3.0 (/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(try_trait)]
[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 `wxf-converter`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "cd50abb538de72643ef1bd8b57b98e76675959522e086612895e0e2ab623e189", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd50abb538de72643ef1bd8b57b98e76675959522e086612895e0e2ab623e189", kill_on_drop: false }`
[INFO] [stdout] cd50abb538de72643ef1bd8b57b98e76675959522e086612895e0e2ab623e189
