[INFO] fetching crate dmux 0.6.2...
[INFO] checking dmux-0.6.2 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate dmux 0.6.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate dmux 0.6.2 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dmux 0.6.2
[INFO] finished tweaking crates.io crate dmux 0.6.2
[INFO] tweaked toml for crates.io crate dmux 0.6.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate dmux 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 0291c7aa969ae6bee2f82c991d5761ea774756b34c8005492fc0c8fcf401072d
[INFO] running `Command { std: "docker" "start" "-a" "0291c7aa969ae6bee2f82c991d5761ea774756b34c8005492fc0c8fcf401072d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0291c7aa969ae6bee2f82c991d5761ea774756b34c8005492fc0c8fcf401072d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0291c7aa969ae6bee2f82c991d5761ea774756b34c8005492fc0c8fcf401072d", kill_on_drop: false }`
[INFO] [stdout] 0291c7aa969ae6bee2f82c991d5761ea774756b34c8005492fc0c8fcf401072d
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28f700f84d40d9d5e3fc64a4fb47add66b1a06b2752b90a3f1c53363f32e2e44
[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" "28f700f84d40d9d5e3fc64a4fb47add66b1a06b2752b90a3f1c53363f32e2e44", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking tmux_interface v0.0.6
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking grep-cli v0.1.4
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]     Checking dmux v0.6.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.86s
[INFO] running `Command { std: "docker" "inspect" "28f700f84d40d9d5e3fc64a4fb47add66b1a06b2752b90a3f1c53363f32e2e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28f700f84d40d9d5e3fc64a4fb47add66b1a06b2752b90a3f1c53363f32e2e44", kill_on_drop: false }`
[INFO] [stdout] 28f700f84d40d9d5e3fc64a4fb47add66b1a06b2752b90a3f1c53363f32e2e44