[INFO] fetching crate build-utils 0.1.0...
[INFO] checking build-utils-0.1.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate build-utils 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate build-utils 0.1.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate build-utils 0.1.0
[INFO] finished tweaking crates.io crate build-utils 0.1.0
[INFO] tweaked toml for crates.io crate build-utils 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17eca93a74b516f763e5b5ec1b97d04f239ac926d02952a80c1d6d0b5f11eacd
[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" "17eca93a74b516f763e5b5ec1b97d04f239ac926d02952a80c1d6d0b5f11eacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17eca93a74b516f763e5b5ec1b97d04f239ac926d02952a80c1d6d0b5f11eacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17eca93a74b516f763e5b5ec1b97d04f239ac926d02952a80c1d6d0b5f11eacd", kill_on_drop: false }`
[INFO] [stdout] 17eca93a74b516f763e5b5ec1b97d04f239ac926d02952a80c1d6d0b5f11eacd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] a09e9c8bb49579e38e7c4e1660a2211329e1eae13e49af6145e91bc7d28e51cb
[INFO] running `Command { std: "docker" "start" "-a" "a09e9c8bb49579e38e7c4e1660a2211329e1eae13e49af6145e91bc7d28e51cb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking build-utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::util::create_temporary_path`
[INFO] [stdout]    --> src/build/meson.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |     use crate::util::create_temporary_path;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `checkout_submodule`
[INFO] [stdout]   --> src/source/download.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     checkout_submodule: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_persistent`
[INFO] [stdout]   --> src/util.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn from_persistent(path: PathBuf) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `checkout_submodule`
[INFO] [stdout]   --> src/source/download.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     checkout_submodule: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_persistent`
[INFO] [stdout]   --> src/util.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn from_persistent(path: PathBuf) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "a09e9c8bb49579e38e7c4e1660a2211329e1eae13e49af6145e91bc7d28e51cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a09e9c8bb49579e38e7c4e1660a2211329e1eae13e49af6145e91bc7d28e51cb", kill_on_drop: false }`
[INFO] [stdout] a09e9c8bb49579e38e7c4e1660a2211329e1eae13e49af6145e91bc7d28e51cb