[INFO] cloning repository https://github.com/rockwotj/jump
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rockwotj/jump" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frockwotj%2Fjump", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frockwotj%2Fjump'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ab2554d3cffecb9273c818e3a0396e559886815
[INFO] testing rockwotj/jump against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frockwotj%2Fjump" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rockwotj/jump on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rockwotj/jump
[INFO] finished tweaking git repo https://github.com/rockwotj/jump
[INFO] tweaked toml for git repo https://github.com/rockwotj/jump written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/rockwotj/jump already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b670d18a2de1aa56c68844dd47e7d36fa0d3a7bd4cfed1f86128c109170cd09f
[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" "b670d18a2de1aa56c68844dd47e7d36fa0d3a7bd4cfed1f86128c109170cd09f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b670d18a2de1aa56c68844dd47e7d36fa0d3a7bd4cfed1f86128c109170cd09f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b670d18a2de1aa56c68844dd47e7d36fa0d3a7bd4cfed1f86128c109170cd09f", kill_on_drop: false }`
[INFO] [stdout] b670d18a2de1aa56c68844dd47e7d36fa0d3a7bd4cfed1f86128c109170cd09f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.59.0" "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] 6df869acb4c5264259634854cea86e52650f9f84b6372afa9ad395c96268b1cf
[INFO] running `Command { std: "docker" "start" "-a" "6df869acb4c5264259634854cea86e52650f9f84b6372afa9ad395c96268b1cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling unicode-segmentation v0.1.3
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling serde v0.8.20
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]    Compiling term_size v0.2.1
[INFO] [stderr]    Compiling clap v2.19.2
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.2
[INFO] [stderr]    Compiling serde_codegen v0.8.20
[INFO] [stderr]    Compiling serde_json v0.8.4
[INFO] [stderr]    Compiling serde_derive v0.8.20
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-0.8.20/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro, proc_macro_lib)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[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 `serde_derive` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6df869acb4c5264259634854cea86e52650f9f84b6372afa9ad395c96268b1cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df869acb4c5264259634854cea86e52650f9f84b6372afa9ad395c96268b1cf", kill_on_drop: false }`
[INFO] [stdout] 6df869acb4c5264259634854cea86e52650f9f84b6372afa9ad395c96268b1cf