[INFO] fetching crate n5 0.7.6...
[INFO] checking n5-0.7.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate n5 0.7.6 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate n5 0.7.6 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate n5 0.7.6
[INFO] finished tweaking crates.io crate n5 0.7.6
[INFO] tweaked toml for crates.io crate n5 0.7.6 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 86 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding futures v0.1.31 (latest: v0.3.30)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding itertools v0.8.2 (latest: v0.12.1)
[INFO] [stderr]       Adding lz-fear v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding matrixmultiply v0.2.4 (latest: v0.3.8)
[INFO] [stderr]       Adding ndarray v0.13.1 (latest: v0.15.6)
[INFO] [stderr]       Adding num-complex v0.2.4 (latest: v0.4.5)
[INFO] [stderr]       Adding num-derive v0.2.5 (latest: v0.4.2)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.79)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.35)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding remove_dir_all v0.5.3 (latest: v0.8.2)
[INFO] [stderr]       Adding semver v0.9.0 (latest: v1.0.22)
[INFO] [stderr]       Adding semver-parser v0.7.0 (latest: v0.10.2)
[INFO] [stderr]       Adding syn v0.15.44 (latest: v2.0.58)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding tiff v0.3.1 (latest: v0.9.1)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded tiff v0.3.1
[INFO] [stderr]   Downloaded fehler v1.0.0
[INFO] [stderr]   Downloaded num-derive v0.2.5
[INFO] [stderr]   Downloaded lz-fear v0.1.1
[INFO] [stderr]   Downloaded fs2 v0.4.3
[INFO] [stderr]   Downloaded fehler-macros v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5e670319798bb8de2224b61b024f0225585eb53c17d378e0c0a53b5fd6d8475
[INFO] running `Command { std: "docker" "start" "-a" "d5e670319798bb8de2224b61b024f0225585eb53c17d378e0c0a53b5fd6d8475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5e670319798bb8de2224b61b024f0225585eb53c17d378e0c0a53b5fd6d8475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5e670319798bb8de2224b61b024f0225585eb53c17d378e0c0a53b5fd6d8475", kill_on_drop: false }`
[INFO] [stdout] d5e670319798bb8de2224b61b024f0225585eb53c17d378e0c0a53b5fd6d8475
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8a588aab074826e19beb6c09e2e94bc3ceb535841de974235706c58a051ac0f
[INFO] running `Command { std: "docker" "start" "-a" "d8a588aab074826e19beb6c09e2e94bc3ceb535841de974235706c58a051ac0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]    Compiling lz4-sys v1.9.4
[INFO] [stderr]    Compiling lzma-sys v0.1.20
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking xz2 v0.1.7
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking bzip2 v0.4.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking lz4 v1.24.0
[INFO] [stderr]     Checking n5 v0.7.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/filesystem.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     self,
[INFO] [stdout]    |     ^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/filesystem.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     self,
[INFO] [stdout]    |     ^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]   --> benches/parallel_write.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     self,
[INFO] [stdout]    |     ^^^^ the item `futures` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tempdir` is imported redundantly
[INFO] [stdout]   --> benches/parallel_write.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | use tempdir;
[INFO] [stdout]    |     ^^^^^^^ the item `tempdir` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 47.00s
[INFO] running `Command { std: "docker" "inspect" "d8a588aab074826e19beb6c09e2e94bc3ceb535841de974235706c58a051ac0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8a588aab074826e19beb6c09e2e94bc3ceb535841de974235706c58a051ac0f", kill_on_drop: false }`
[INFO] [stdout] d8a588aab074826e19beb6c09e2e94bc3ceb535841de974235706c58a051ac0f