[INFO] cloning repository https://github.com/jkcclemens/passphrase
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jkcclemens/passphrase" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjkcclemens%2Fpassphrase", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjkcclemens%2Fpassphrase'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 303c0f9856b9508fdf6d2edd1d9df1542da246f3
[INFO] documenting jkcclemens/passphrase against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjkcclemens%2Fpassphrase" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jkcclemens/passphrase on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jkcclemens/passphrase
[INFO] finished tweaking git repo https://github.com/jkcclemens/passphrase
[INFO] tweaked toml for git repo https://github.com/jkcclemens/passphrase written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jkcclemens/passphrase already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xz2 v0.1.6
[INFO] [stderr]   Downloaded lzma-sys v0.1.14
[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-2020-08-29" "metadata" "--no-deps" "--format-version=1", 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] acaee713e30dbf4e63a8a010bfec9615b6c97b9180014fa998168dd8716e2d4b
[INFO] running `Command { std: "docker" "start" "-a" "acaee713e30dbf4e63a8a010bfec9615b6c97b9180014fa998168dd8716e2d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acaee713e30dbf4e63a8a010bfec9615b6c97b9180014fa998168dd8716e2d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acaee713e30dbf4e63a8a010bfec9615b6c97b9180014fa998168dd8716e2d4b", kill_on_drop: false }`
[INFO] [stdout] acaee713e30dbf4e63a8a010bfec9615b6c97b9180014fa998168dd8716e2d4b
[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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5db4c3bbde7f68455040238a9dde294cc291f1b13dac2c10ed7023ab8daa461e
[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" "5db4c3bbde7f68455040238a9dde294cc291f1b13dac2c10ed7023ab8daa461e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.53
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]     Checking rmp v0.8.7
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling lzma-sys v0.1.14
[INFO] [stderr]    Compiling xz2 v0.1.6
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling passphrase v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting passphrase v1.1.0 (/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(process_exitcode_placeholder)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `passphrase`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name passphrase src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern atty=/opt/rustwide/target/debug/deps/libatty-b24b7079da296c21.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-3d61e4f308e8bc35.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-f7dbd11a2149f3ea.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-109691f7fd3dbeaf.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-7bac6093cb90b503.rmeta --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-492ba7ce633be29d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-37eb56bce4a0bb62.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-02b1f16312c6369a.so --extern xz2=/opt/rustwide/target/debug/deps/libxz2-90cc55c4d6691917.rmeta --cap-lints=warn --crate-version 1.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5db4c3bbde7f68455040238a9dde294cc291f1b13dac2c10ed7023ab8daa461e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5db4c3bbde7f68455040238a9dde294cc291f1b13dac2c10ed7023ab8daa461e", kill_on_drop: false }`
[INFO] [stdout] 5db4c3bbde7f68455040238a9dde294cc291f1b13dac2c10ed7023ab8daa461e