[INFO] fetching crate pepper 0.8.7...
[INFO] checking pepper-0.8.7 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate pepper 0.8.7 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate pepper 0.8.7 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] started tweaking crates.io crate pepper 0.8.7
[INFO] finished tweaking crates.io crate pepper 0.8.7
[INFO] tweaked toml for crates.io crate pepper 0.8.7 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate pepper 0.8.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "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] 6a2cfb331205d220d01c8203c0b1d5721dd0e35cf596a9a0a43f00fd29baa56c
[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" "6a2cfb331205d220d01c8203c0b1d5721dd0e35cf596a9a0a43f00fd29baa56c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a2cfb331205d220d01c8203c0b1d5721dd0e35cf596a9a0a43f00fd29baa56c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a2cfb331205d220d01c8203c0b1d5721dd0e35cf596a9a0a43f00fd29baa56c", kill_on_drop: false }`
[INFO] [stdout] 6a2cfb331205d220d01c8203c0b1d5721dd0e35cf596a9a0a43f00fd29baa56c
[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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] 153fa30a4790fd41f4c9f296bc805f90b1a605869ffc4a8ab9e635d43349b62c
[INFO] running `Command { std: "docker" "start" "-a" "153fa30a4790fd41f4c9f296bc805f90b1a605869ffc4a8ab9e635d43349b62c", kill_on_drop: false }`
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking pepper v0.8.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `declaration_provider`
[INFO] [stdout]    --> src/lsp/client.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 |     declaration_provider: GenericCapability,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `implementation_provider`
[INFO] [stdout]    --> src/lsp/client.rs:204:5
[INFO] [stdout]     |
[INFO] [stdout] 204 |     implementation_provider: GenericCapability,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `declaration_provider`
[INFO] [stdout]    --> src/lsp/client.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 |     declaration_provider: GenericCapability,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `implementation_provider`
[INFO] [stdout]    --> src/lsp/client.rs:204:5
[INFO] [stdout]     |
[INFO] [stdout] 204 |     implementation_provider: GenericCapability,
[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 8.04s
[INFO] running `Command { std: "docker" "inspect" "153fa30a4790fd41f4c9f296bc805f90b1a605869ffc4a8ab9e635d43349b62c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "153fa30a4790fd41f4c9f296bc805f90b1a605869ffc4a8ab9e635d43349b62c", kill_on_drop: false }`
[INFO] [stdout] 153fa30a4790fd41f4c9f296bc805f90b1a605869ffc4a8ab9e635d43349b62c