[INFO] fetching crate ipld_hamt 2.0.0...
[INFO] checking ipld_hamt-2.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ipld_hamt 2.0.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate ipld_hamt 2.0.0 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 ipld_hamt 2.0.0
[INFO] finished tweaking crates.io crate ipld_hamt 2.0.0
[INFO] tweaked toml for crates.io crate ipld_hamt 2.0.0 written to /workspace/builds/worker-0-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 124 packages
[INFO] [stderr]       Adding arrayvec v0.5.2 (latest: v0.7.4)
[INFO] [stderr]       Adding async-recursion v0.3.2 (latest: v1.1.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding blake2b_simd v0.5.11 (latest: v1.0.2)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding cid v0.6.1 (latest: v0.11.1)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding constant_time_eq v0.1.5 (latest: v0.3.0)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding integer-encoding v2.1.3 (latest: v4.0.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding multibase v0.8.0 (latest: v0.9.1)
[INFO] [stderr]       Adding multihash v0.13.2 (latest: v0.19.1)
[INFO] [stderr]       Adding multihash-derive v0.7.2 (latest: v0.9.0)
[INFO] [stderr]       Adding parking_lot v0.11.2 (latest: v0.12.1)
[INFO] [stderr]       Adding parking_lot_core v0.8.6 (latest: v0.9.9)
[INFO] [stderr]       Adding proc-macro-crate v1.3.1 (latest: v3.1.0)
[INFO] [stderr]       Adding redox_syscall v0.2.16 (latest: v0.5.1)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] [stderr]       Adding toml_edit v0.19.15 (latest: v0.22.9)
[INFO] [stderr]       Adding unsigned-varint v0.5.1 (latest: v0.8.0)
[INFO] [stderr]       Adding unsigned-varint v0.6.0 (latest: v0.8.0)
[INFO] [stderr]       Adding winnow v0.5.40 (latest: v0.6.5)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unsigned-varint v0.6.0
[INFO] [stderr]   Downloaded async-recursion v0.3.2
[INFO] [stderr]   Downloaded forest_ipld v0.1.1
[INFO] [stderr]   Downloaded forest_db v0.1.0
[INFO] [stderr]   Downloaded ipld_blockstore v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] abd7b390e3be036f43873ac0b65deaa6aa21c58014891c27b9aefbdfd4404b65
[INFO] running `Command { std: "docker" "start" "-a" "abd7b390e3be036f43873ac0b65deaa6aa21c58014891c27b9aefbdfd4404b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abd7b390e3be036f43873ac0b65deaa6aa21c58014891c27b9aefbdfd4404b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abd7b390e3be036f43873ac0b65deaa6aa21c58014891c27b9aefbdfd4404b65", kill_on_drop: false }`
[INFO] [stdout] abd7b390e3be036f43873ac0b65deaa6aa21c58014891c27b9aefbdfd4404b65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 66429fc64ad05cf189878fb64b75e2b3c34285a356c615e67c8f2201f1c9522e
[INFO] running `Command { std: "docker" "start" "-a" "66429fc64ad05cf189878fb64b75e2b3c34285a356c615e67c8f2201f1c9522e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling data-encoding v2.5.0
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking base-x v0.2.11
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking arrayref v0.3.7
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking unsigned-varint v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]     Checking integer-encoding v2.1.3
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking blake2b_simd v0.5.11
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking unsigned-varint v0.6.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]    Compiling async-trait v0.1.79
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.12
[INFO] [stderr]    Compiling multihash-derive v0.7.2
[INFO] [stderr]    Compiling serde_tuple_macros v0.5.0
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking data-encoding-macro v0.1.14
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]     Checking multibase v0.9.1
[INFO] [stderr]     Checking multihash v0.13.2
[INFO] [stderr]     Checking cid v0.6.1
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking cs_serde_bytes v0.12.2
[INFO] [stderr]     Checking cs_serde_cbor v0.12.0
[INFO] [stderr]     Checking forest_json_utils v0.1.1
[INFO] [stderr]     Checking serde_tuple v0.5.0
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking forest_hash_utils v0.1.0
[INFO] [stderr]     Checking forest_cid v0.3.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking forest_encoding v0.2.2
[INFO] [stderr]     Checking forest_db v0.1.0
[INFO] [stderr]     Checking forest_ipld v0.1.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking ipld_blockstore v0.1.1
[INFO] [stderr]     Checking ipld_hamt v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_bytes` is imported redundantly
[INFO] [stdout]  --> src/bitfield.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     serde_bytes,
[INFO] [stdout]   |     ^^^^^^^^^^^ the item `serde_bytes` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::hash::*`
[INFO] [stdout]   --> src/lib.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub use self::hash::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_bytes` is imported redundantly
[INFO] [stdout]  --> src/bitfield.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     serde_bytes,
[INFO] [stdout]   |     ^^^^^^^^^^^ the item `serde_bytes` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::hash::*`
[INFO] [stdout]   --> src/lib.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub use self::hash::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.26s
[INFO] running `Command { std: "docker" "inspect" "66429fc64ad05cf189878fb64b75e2b3c34285a356c615e67c8f2201f1c9522e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66429fc64ad05cf189878fb64b75e2b3c34285a356c615e67c8f2201f1c9522e", kill_on_drop: false }`
[INFO] [stdout] 66429fc64ad05cf189878fb64b75e2b3c34285a356c615e67c8f2201f1c9522e