[INFO] fetching crate nstack 0.8.0...
[INFO] checking nstack-0.8.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate nstack 0.8.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate nstack 0.8.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1/source/rust-toolchain
[INFO] started tweaking crates.io crate nstack 0.8.0
[INFO] finished tweaking crates.io crate nstack 0.8.0
[INFO] tweaked toml for crates.io crate nstack 0.8.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arbitrary v0.3.3
[INFO] [stderr]   Downloaded canonical v0.6.0
[INFO] [stderr]   Downloaded microkelvin v0.7.1
[INFO] [stderr]   Downloaded blake2b_simd v0.3.1
[INFO] [stderr]   Downloaded canonical_derive v0.6.0
[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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 188b53c6a4b4730ed4249f212bca6ebd1978f5b04d306f148b02bb02e1720f83
[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" "188b53c6a4b4730ed4249f212bca6ebd1978f5b04d306f148b02bb02e1720f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "188b53c6a4b4730ed4249f212bca6ebd1978f5b04d306f148b02bb02e1720f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "188b53c6a4b4730ed4249f212bca6ebd1978f5b04d306f148b02bb02e1720f83", kill_on_drop: false }`
[INFO] [stdout] 188b53c6a4b4730ed4249f212bca6ebd1978f5b04d306f148b02bb02e1720f83
[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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ea2011f1a3b182d61e566b3a38bd4fed85cb92f4fd55a5da825ec2f0971922a
[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" "8ea2011f1a3b182d61e566b3a38bd4fed85cb92f4fd55a5da825ec2f0971922a", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling arbitrary v0.3.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking blake2b_simd v0.3.1
[INFO] [stderr]     Checking canonical v0.6.0
[INFO] [stderr]    Compiling canonical_derive v0.6.0
[INFO] [stderr]     Checking microkelvin v0.7.1
[INFO] [stderr]     Checking nstack v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.31s
[INFO] running `Command { std: "docker" "inspect" "8ea2011f1a3b182d61e566b3a38bd4fed85cb92f4fd55a5da825ec2f0971922a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea2011f1a3b182d61e566b3a38bd4fed85cb92f4fd55a5da825ec2f0971922a", kill_on_drop: false }`
[INFO] [stdout] 8ea2011f1a3b182d61e566b3a38bd4fed85cb92f4fd55a5da825ec2f0971922a