[INFO] cloning repository https://github.com/dermoumi/rmux
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dermoumi/rmux" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermoumi%2Frmux", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermoumi%2Frmux'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec6283e01e9c2d5aac47e8fb43b57f085865e5c4
[INFO] checking dermoumi/rmux against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermoumi%2Frmux" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dermoumi/rmux on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dermoumi/rmux
[INFO] finished tweaking git repo https://github.com/dermoumi/rmux
[INFO] tweaked toml for git repo https://github.com/dermoumi/rmux written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/dermoumi/rmux already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "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 main_error v0.1.1
[INFO] [stderr]   Downloaded mkdirp v1.0.0
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "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] 9bc3d9864794207156c575a05f2da6d4dc5248e593ec4eb3b44294fc9af6923e
[INFO] running `Command { std: "docker" "start" "-a" "9bc3d9864794207156c575a05f2da6d4dc5248e593ec4eb3b44294fc9af6923e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bc3d9864794207156c575a05f2da6d4dc5248e593ec4eb3b44294fc9af6923e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bc3d9864794207156c575a05f2da6d4dc5248e593ec4eb3b44294fc9af6923e", kill_on_drop: false }`
[INFO] [stdout] 9bc3d9864794207156c575a05f2da6d4dc5248e593ec4eb3b44294fc9af6923e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65e8dc5cc087e63c61596d257819a76e532a6a9a32a307e5c8956636e56895aa
[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" "65e8dc5cc087e63c61596d257819a76e532a6a9a32a307e5c8956636e56895aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking mkdirp v1.0.0
[INFO] [stderr]     Checking shell-words v1.0.0
[INFO] [stderr]     Checking main_error v0.1.1
[INFO] [stderr]     Checking dirs-sys-next v0.1.1
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking app_dirs v1.2.1
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking shellexpand v2.1.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking console v0.13.0
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking airmux v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.53s
[INFO] running `Command { std: "docker" "inspect" "65e8dc5cc087e63c61596d257819a76e532a6a9a32a307e5c8956636e56895aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65e8dc5cc087e63c61596d257819a76e532a6a9a32a307e5c8956636e56895aa", kill_on_drop: false }`
[INFO] [stdout] 65e8dc5cc087e63c61596d257819a76e532a6a9a32a307e5c8956636e56895aa