[INFO] cloning repository https://github.com/McKizzle/meme-bin-rider
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/McKizzle/meme-bin-rider" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcKizzle%2Fmeme-bin-rider", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcKizzle%2Fmeme-bin-rider'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 656ee72a601a577bfce1f37ce3ce6663b4dbb0eb
[INFO] documenting McKizzle/meme-bin-rider 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%2FMcKizzle%2Fmeme-bin-rider" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/McKizzle/meme-bin-rider 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/McKizzle/meme-bin-rider
[INFO] finished tweaking git repo https://github.com/McKizzle/meme-bin-rider
[INFO] tweaked toml for git repo https://github.com/McKizzle/meme-bin-rider written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/McKizzle/meme-bin-rider 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 httparse v1.2.1
[INFO] [stderr]   Downloaded mime v0.2.2
[INFO] [stderr]   Downloaded version_check v0.1.0
[INFO] [stderr]   Downloaded rand v0.3.15
[INFO] [stderr]   Downloaded redox_syscall v0.1.16
[INFO] [stderr]   Downloaded time v0.1.36
[INFO] [stderr]   Downloaded rustc-serialize v0.3.22
[INFO] [stderr]   Downloaded log v0.3.6
[INFO] [stderr]   Downloaded unicase v1.4.0
[INFO] [stderr]   Downloaded term-painter v0.2.3
[INFO] [stderr]   Downloaded hyper v0.10.4
[INFO] [stderr]   Downloaded idna v0.1.0
[INFO] [stderr]   Downloaded traitobject v0.0.1
[INFO] [stderr]   Downloaded term v0.4.5
[INFO] [stderr]   Downloaded state v0.2.0
[INFO] [stderr]   Downloaded cookie v0.6.0
[INFO] [stderr]   Downloaded libc v0.2.20
[INFO] [stderr]   Downloaded unicode-normalization v0.1.4
[INFO] [stderr]   Downloaded url v1.4.0
[INFO] [stderr]   Downloaded num_cpus v1.2.1
[INFO] [stderr]   Downloaded matches v0.1.4
[INFO] [stderr]   Downloaded unicode-bidi v0.2.5
[INFO] [stderr]   Downloaded rocket v0.2.0
[INFO] [stderr]   Downloaded rocket_codegen v0.2.0
[INFO] [stderr]   Downloaded toml v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] d5183de0397f38c013b87425058fcb254c8e94f6611d0b757b7cb08dc8ec7868
[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" "d5183de0397f38c013b87425058fcb254c8e94f6611d0b757b7cb08dc8ec7868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5183de0397f38c013b87425058fcb254c8e94f6611d0b757b7cb08dc8ec7868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5183de0397f38c013b87425058fcb254c8e94f6611d0b757b7cb08dc8ec7868", kill_on_drop: false }`
[INFO] [stdout] d5183de0397f38c013b87425058fcb254c8e94f6611d0b757b7cb08dc8ec7868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f33951808ce1e817543d02f2b8aef698719021124f6ea11a8001225720b10f4e
[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" "f33951808ce1e817543d02f2b8aef698719021124f6ea11a8001225720b10f4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.0
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.4
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling term v0.4.5
[INFO] [stderr]    Compiling traitobject v0.0.1
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling state v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/state-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[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 `state`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/state-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "f33951808ce1e817543d02f2b8aef698719021124f6ea11a8001225720b10f4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f33951808ce1e817543d02f2b8aef698719021124f6ea11a8001225720b10f4e", kill_on_drop: false }`
[INFO] [stdout] f33951808ce1e817543d02f2b8aef698719021124f6ea11a8001225720b10f4e