[INFO] fetching crate zstd-safe 3.0.0+zstd.1.4.8...
[INFO] checking zstd-safe-3.0.0+zstd.1.4.8 against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] extracting crate zstd-safe 3.0.0+zstd.1.4.8 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate zstd-safe 3.0.0+zstd.1.4.8 on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zstd-safe 3.0.0+zstd.1.4.8
[INFO] finished tweaking crates.io crate zstd-safe 3.0.0+zstd.1.4.8
[INFO] tweaked toml for crates.io crate zstd-safe 3.0.0+zstd.1.4.8 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--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 zstd-sys v1.4.19+zstd.1.4.8
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d61142d7153fe1b578c58a9b926ab79eb2356d21644fd0c4f248e35ba787cf2
[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" "7d61142d7153fe1b578c58a9b926ab79eb2356d21644fd0c4f248e35ba787cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d61142d7153fe1b578c58a9b926ab79eb2356d21644fd0c4f248e35ba787cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d61142d7153fe1b578c58a9b926ab79eb2356d21644fd0c4f248e35ba787cf2", kill_on_drop: false }`
[INFO] [stdout] 7d61142d7153fe1b578c58a9b926ab79eb2356d21644fd0c4f248e35ba787cf2
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65027ed9ff1e50a2d3a7b31790f45be036d5cb2b5bdf49d6c5b7ab5e0780ad23
[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" "65027ed9ff1e50a2d3a7b31790f45be036d5cb2b5bdf49d6c5b7ab5e0780ad23", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling zstd-safe v3.0.0+zstd.1.4.8 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling zstd-sys v1.4.19+zstd.1.4.8
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]     --> src/lib.rs:1061:5
[INFO] [stdout]      |
[INFO] [stdout] 1061 |     parent: &'a mut OutBuffer<'b>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]     --> src/lib.rs:1115:5
[INFO] [stdout]      |
[INFO] [stdout] 1115 |     parent: &'a mut InBuffer<'b>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]     --> src/lib.rs:1061:5
[INFO] [stdout]      |
[INFO] [stdout] 1061 |     parent: &'a mut OutBuffer<'b>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]     --> src/lib.rs:1115:5
[INFO] [stdout]      |
[INFO] [stdout] 1115 |     parent: &'a mut InBuffer<'b>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 13s
[INFO] running `Command { std: "docker" "inspect" "65027ed9ff1e50a2d3a7b31790f45be036d5cb2b5bdf49d6c5b7ab5e0780ad23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65027ed9ff1e50a2d3a7b31790f45be036d5cb2b5bdf49d6c5b7ab5e0780ad23", kill_on_drop: false }`
[INFO] [stdout] 65027ed9ff1e50a2d3a7b31790f45be036d5cb2b5bdf49d6c5b7ab5e0780ad23