[INFO] cloning repository https://github.com/desource/alexandria.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/desource/alexandria.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f1386486eaed21df78b2678cb1fbabc1646abfc
[INFO] checking desource/alexandria.rs against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/desource/alexandria.rs on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/desource/alexandria.rs
[INFO] finished tweaking git repo https://github.com/desource/alexandria.rs
[INFO] tweaked toml for git repo https://github.com/desource/alexandria.rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/desource/alexandria.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afd1132a29b14e95aa34990f7708e5b3a4b6f91d495b28eaae38f2a7e978de9a
[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" "afd1132a29b14e95aa34990f7708e5b3a4b6f91d495b28eaae38f2a7e978de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afd1132a29b14e95aa34990f7708e5b3a4b6f91d495b28eaae38f2a7e978de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afd1132a29b14e95aa34990f7708e5b3a4b6f91d495b28eaae38f2a7e978de9a", kill_on_drop: false }`
[INFO] [stdout] afd1132a29b14e95aa34990f7708e5b3a4b6f91d495b28eaae38f2a7e978de9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eb10d7459a8f33c4d61ae560793e61abbb9ffe5e408b58ea5783895dac68a4a
[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" "8eb10d7459a8f33c4d61ae560793e61abbb9ffe5e408b58ea5783895dac68a4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring v0.2.3
[INFO] [stderr]     Checking untrusted v0.3.1
[INFO] [stderr]     Checking lazy_static v0.2.1
[INFO] [stderr]     Checking libc v0.2.15
[INFO] [stdout] error[E0277]: `&&Vec<String>` is not an iterator
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ring-0.2.3/build.rs:207:19
[INFO] [stdout]     |
[INFO] [stdout] 207 |             .args(&args)
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   `&&Vec<String>` is not an iterator
[INFO] [stdout]     |                   help: consider adding dereference here: `&*args`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Iterator` is not implemented for `&&Vec<String>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `IntoIterator` for `&&Vec<String>`
[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 E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ring`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8eb10d7459a8f33c4d61ae560793e61abbb9ffe5e408b58ea5783895dac68a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb10d7459a8f33c4d61ae560793e61abbb9ffe5e408b58ea5783895dac68a4a", kill_on_drop: false }`
[INFO] [stdout] 8eb10d7459a8f33c4d61ae560793e61abbb9ffe5e408b58ea5783895dac68a4a