[INFO] fetching crate failchain 0.1018.2...
[INFO] testing failchain-0.1018.2 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate failchain 0.1018.2 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate failchain 0.1018.2 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-15/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" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0e868caa7d80b5c2ff72e62d427eca1a2b4b8de45b93393205b42db39b95e76
[INFO] running `Command { std: "docker" "start" "-a" "d0e868caa7d80b5c2ff72e62d427eca1a2b4b8de45b93393205b42db39b95e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e868caa7d80b5c2ff72e62d427eca1a2b4b8de45b93393205b42db39b95e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e868caa7d80b5c2ff72e62d427eca1a2b4b8de45b93393205b42db39b95e76", kill_on_drop: false }`
[INFO] [stdout] d0e868caa7d80b5c2ff72e62d427eca1a2b4b8de45b93393205b42db39b95e76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbbde1e6398aeb2cb14ef8ad69cd6cea4a97371284bcc08f8c0276438f655e22
[INFO] running `Command { std: "docker" "start" "-a" "bbbde1e6398aeb2cb14ef8ad69cd6cea4a97371284bcc08f8c0276438f655e22", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.56
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling failchain v0.1018.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.78s
[INFO] running `Command { std: "docker" "inspect" "bbbde1e6398aeb2cb14ef8ad69cd6cea4a97371284bcc08f8c0276438f655e22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbbde1e6398aeb2cb14ef8ad69cd6cea4a97371284bcc08f8c0276438f655e22", kill_on_drop: false }`
[INFO] [stdout] bbbde1e6398aeb2cb14ef8ad69cd6cea4a97371284bcc08f8c0276438f655e22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a931ac77392e722d5207b5cd4813cbdfd6a5b02f5e97c27bc91cf686f689f78f
[INFO] running `Command { std: "docker" "start" "-a" "a931ac77392e722d5207b5cd4813cbdfd6a5b02f5e97c27bc91cf686f689f78f", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> examples/main.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stdout]    |              ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> examples/main.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stdout]    |              ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> examples/main.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stdout]    |              ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> examples/main.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stdout]    |              ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "a931ac77392e722d5207b5cd4813cbdfd6a5b02f5e97c27bc91cf686f689f78f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a931ac77392e722d5207b5cd4813cbdfd6a5b02f5e97c27bc91cf686f689f78f", kill_on_drop: false }`
[INFO] [stdout] a931ac77392e722d5207b5cd4813cbdfd6a5b02f5e97c27bc91cf686f689f78f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cd18480f279aedd062cc531184f18fc33175c0253778cf0222c608f71f53e5ff
[INFO] running `Command { std: "docker" "start" "-a" "cd18480f279aedd062cc531184f18fc33175c0253778cf0222c608f71f53e5ff", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `wad_file`
[INFO] [stderr]   --> examples/main.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let wad_file = File::open(wad).chain_err(|| ErrorKind::WadIo(wad.to_owned()))?;
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wad_file`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `metadata_file`
[INFO] [stderr]   --> examples/main.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let metadata_file = File::open(metadata)
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata_file`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Result`
[INFO] [stderr]   --> examples/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub type Result<T> = StdResult<T, Error>;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `MetadataIo`
[INFO] [stderr]   --> examples/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         MetadataIo(PathBuf),
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> examples/main.rs:12:14
[INFO] [stderr]    |
[INFO] [stderr] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |              ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CorruptMetadata`
[INFO] [stderr]   --> examples/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         CorruptMetadata(String),
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> examples/main.rs:12:14
[INFO] [stderr]    |
[INFO] [stderr] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |              ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `WadIo`
[INFO] [stderr]   --> examples/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         WadIo(PathBuf),
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> examples/main.rs:12:14
[INFO] [stderr]    |
[INFO] [stderr] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |              ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CorruptWad`
[INFO] [stderr]   --> examples/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         CorruptWad(String),
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> examples/main.rs:12:14
[INFO] [stderr]    |
[INFO] [stderr] 12 |     #[derive(Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |              ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `validate_metadata`
[INFO] [stdout] 
[INFO] [stderr]   --> examples/main.rs:44:8
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 44 |     fn validate_metadata(path: &Path, metadata: &str) -> Result<()> {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `load`
[INFO] [stderr]   --> examples/main.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 |     fn load(wad: &Path, metadata: &Path) -> Result<()> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `failchain` (example "main") generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/failchain-0fe44975d3ca0fc3)
[INFO] [stderr]    Doc-tests failchain
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cd18480f279aedd062cc531184f18fc33175c0253778cf0222c608f71f53e5ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd18480f279aedd062cc531184f18fc33175c0253778cf0222c608f71f53e5ff", kill_on_drop: false }`
[INFO] [stdout] cd18480f279aedd062cc531184f18fc33175c0253778cf0222c608f71f53e5ff