[INFO] fetching crate failchain 0.1018.2...
[INFO] checking failchain-0.1018.2 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate failchain 0.1018.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate failchain 0.1018.2 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate failchain 0.1018.2
[INFO] finished tweaking crates.io crate failchain 0.1018.2
[INFO] tweaked toml for crates.io crate failchain 0.1018.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate failchain 0.1018.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8de0a88a9fced12200b1a033b133e2862cdede8019d880c47d77ce40e40f27c
[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" "e8de0a88a9fced12200b1a033b133e2862cdede8019d880c47d77ce40e40f27c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8de0a88a9fced12200b1a033b133e2862cdede8019d880c47d77ce40e40f27c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8de0a88a9fced12200b1a033b133e2862cdede8019d880c47d77ce40e40f27c", kill_on_drop: false }`
[INFO] [stdout] e8de0a88a9fced12200b1a033b133e2862cdede8019d880c47d77ce40e40f27c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 214fe33ae73fd0f50f8bea50bd69e1328928f28b6fe703cb8e98e3717e2a5a6d
[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" "214fe33ae73fd0f50f8bea50bd69e1328928f28b6fe703cb8e98e3717e2a5a6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking failchain v0.1018.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `wad_file`
[INFO] [stdout]   --> examples/main.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let wad_file = File::open(wad).chain_err(|| ErrorKind::WadIo(wad.to_owned()))?;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wad_file`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metadata_file`
[INFO] [stdout]   --> examples/main.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let metadata_file = File::open(metadata)
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]   --> examples/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub type Result<T> = StdResult<T, Error>;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MetadataIo`
[INFO] [stdout]   --> examples/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         MetadataIo(PathBuf),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CorruptMetadata`
[INFO] [stdout]   --> examples/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         CorruptMetadata(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WadIo`
[INFO] [stdout]   --> examples/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         WadIo(PathBuf),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CorruptWad`
[INFO] [stdout]   --> examples/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         CorruptWad(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `validate_metadata`
[INFO] [stdout]   --> examples/main.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn validate_metadata(path: &Path, metadata: &str) -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `load`
[INFO] [stdout]   --> examples/main.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn load(wad: &Path, metadata: &Path) -> Result<()> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.19s
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "214fe33ae73fd0f50f8bea50bd69e1328928f28b6fe703cb8e98e3717e2a5a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "214fe33ae73fd0f50f8bea50bd69e1328928f28b6fe703cb8e98e3717e2a5a6d", kill_on_drop: false }`
[INFO] [stdout] 214fe33ae73fd0f50f8bea50bd69e1328928f28b6fe703cb8e98e3717e2a5a6d