[INFO] cloning repository https://github.com/jchapman127/uni-project-svm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jchapman127/uni-project-svm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9485de959ab4d232d7fc45e3ca104db257833636
[INFO] documenting jchapman127/uni-project-svm against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jchapman127/uni-project-svm on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jchapman127/uni-project-svm
[INFO] finished tweaking git repo https://github.com/jchapman127/uni-project-svm
[INFO] tweaked toml for git repo https://github.com/jchapman127/uni-project-svm written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jchapman127/uni-project-svm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/Lolirofle/enum_traits`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v2.23.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ee44ccddf8f95508a15e21daabc3c1b1b09489bd35dfa95ef6f9961015498a5
[INFO] running `Command { std: "docker" "start" "-a" "5ee44ccddf8f95508a15e21daabc3c1b1b09489bd35dfa95ef6f9961015498a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ee44ccddf8f95508a15e21daabc3c1b1b09489bd35dfa95ef6f9961015498a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ee44ccddf8f95508a15e21daabc3c1b1b09489bd35dfa95ef6f9961015498a5", kill_on_drop: false }`
[INFO] [stdout] 5ee44ccddf8f95508a15e21daabc3c1b1b09489bd35dfa95ef6f9961015498a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb6ec0fbbf88b334b8d5152abd32794a60102b8f3cbbcd247c09ca6f12a0661d
[INFO] running `Command { std: "docker" "start" "-a" "cb6ec0fbbf88b334b8d5152abd32794a60102b8f3cbbcd247c09ca6f12a0661d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking bitflags v0.8.2
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking vec_map v0.7.0
[INFO] [stderr]     Checking unicode-segmentation v1.1.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking enum_traits v1.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking term_size v0.2.3
[INFO] [stderr]    Compiling syn v0.11.9
[INFO] [stderr]     Checking clap v2.23.1
[INFO] [stderr]    Compiling enum_traits_macros v3.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]  Documenting simple-virtual-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[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 document `simple-virtual-machine`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name svm src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3de8fc2587f35c44 -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-a812b0e10685b5ac.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-e266d0ecafec6941.rmeta --extern enum_traits=/opt/rustwide/target/debug/deps/libenum_traits-fcbc823ada4a5947.rmeta --extern enum_traits_macros=/opt/rustwide/target/debug/deps/libenum_traits_macros-accbf45f88307721.so --extern nom=/opt/rustwide/target/debug/deps/libnom-2b824b5139a475b8.rmeta --extern vec_map=/opt/rustwide/target/debug/deps/libvec_map-bc0cba06751eddb8.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cb6ec0fbbf88b334b8d5152abd32794a60102b8f3cbbcd247c09ca6f12a0661d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6ec0fbbf88b334b8d5152abd32794a60102b8f3cbbcd247c09ca6f12a0661d", kill_on_drop: false }`
[INFO] [stdout] cb6ec0fbbf88b334b8d5152abd32794a60102b8f3cbbcd247c09ca6f12a0661d