[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 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frockwotj%2Fjump" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rockwotj/jump on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-11/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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_codegen v0.8.20
[INFO] [stderr]   Downloaded serde_codegen_internals v0.11.2
[INFO] [stderr]   Downloaded serde_derive v0.8.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] d1a6ec2de3e54f0fb1beb8d8e4c438c3e88a8cade779c52f1b718ea59a5a03a9
[INFO] running `Command { std: "docker" "start" "-a" "d1a6ec2de3e54f0fb1beb8d8e4c438c3e88a8cade779c52f1b718ea59a5a03a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1a6ec2de3e54f0fb1beb8d8e4c438c3e88a8cade779c52f1b718ea59a5a03a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1a6ec2de3e54f0fb1beb8d8e4c438c3e88a8cade779c52f1b718ea59a5a03a9", kill_on_drop: false }`
[INFO] [stdout] d1a6ec2de3e54f0fb1beb8d8e4c438c3e88a8cade779c52f1b718ea59a5a03a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0927b12e5f7a47d57c64b7cd02e753bc2cbc9fea858d0034548e21cef06723dd
[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" "0927b12e5f7a47d57c64b7cd02e753bc2cbc9fea858d0034548e21cef06723dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling unicode-segmentation v0.1.3
[INFO] [stderr]    Compiling term_size v0.2.1
[INFO] [stderr]    Compiling serde_json v0.8.4
[INFO] [stderr]    Compiling clap v2.19.2
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.2
[INFO] [stderr]    Compiling serde_codegen v0.8.20
[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" "0927b12e5f7a47d57c64b7cd02e753bc2cbc9fea858d0034548e21cef06723dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0927b12e5f7a47d57c64b7cd02e753bc2cbc9fea858d0034548e21cef06723dd", kill_on_drop: false }`
[INFO] [stdout] 0927b12e5f7a47d57c64b7cd02e753bc2cbc9fea858d0034548e21cef06723dd