[INFO] fetching crate sp-im 0.3.0...
[INFO] checking sp-im-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate sp-im 0.3.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate sp-im 0.3.0 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 sp-im 0.3.0
[INFO] finished tweaking crates.io crate sp-im 0.3.0
[INFO] tweaked toml for crates.io crate sp-im 0.3.0 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 68 packages
[INFO] [stderr]       Adding ansi_term v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding bit-set v0.4.0 (latest: v0.5.3)
[INFO] [stderr]       Adding bit-vec v0.4.4 (latest: v0.6.3)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding ctor v0.1.26 (latest: v0.2.7)
[INFO] [stderr]       Adding env_logger v0.8.4 (latest: v0.11.3)
[INFO] [stderr]       Adding pretty_assertions v0.6.1 (latest: v1.4.0)
[INFO] [stderr]       Adding proptest v0.5.1 (latest: v1.4.0)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[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_xoshiro v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding regex-syntax v0.4.2 (latest: v0.8.3)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+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 bitmaps v3.2.1
[INFO] [stderr]   Downloaded bit-set v0.4.0
[INFO] [stderr]   Downloaded pretty_assertions v0.6.1
[INFO] [stderr]   Downloaded metrohash v1.0.6
[INFO] [stderr]   Downloaded rand_xoshiro v0.4.0
[INFO] [stderr]   Downloaded sp-sized-chunks v0.1.0
[INFO] [stderr]   Downloaded refpool v0.4.3
[INFO] [stderr]   Downloaded proptest v0.5.1
[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] 16850db7f837f957e8c139713cbc0ae22164d896a17762789df8fa1a64ef2d33
[INFO] running `Command { std: "docker" "start" "-a" "16850db7f837f957e8c139713cbc0ae22164d896a17762789df8fa1a64ef2d33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16850db7f837f957e8c139713cbc0ae22164d896a17762789df8fa1a64ef2d33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16850db7f837f957e8c139713cbc0ae22164d896a17762789df8fa1a64ef2d33", kill_on_drop: false }`
[INFO] [stdout] 16850db7f837f957e8c139713cbc0ae22164d896a17762789df8fa1a64ef2d33
[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] 41139306d9090c552b0db4dc24da565763eb9baf7cc84b4ecdf03a6dd93dfcc0
[INFO] running `Command { std: "docker" "start" "-a" "41139306d9090c552b0db4dc24da565763eb9baf7cc84b4ecdf03a6dd93dfcc0", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking bitmaps v3.2.1
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling derive_arbitrary v1.3.2
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking sp-sized-chunks v0.1.0
[INFO] [stderr]     Checking proptest v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking sp-im v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/ord/map.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Iterator,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/core/src/prelude/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]   --> src/ord/set.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     IntoIterator,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/core/src/prelude/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/conslist.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Iterator,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/core/src/prelude/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking arbitrary v1.3.2
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/nodes/btree.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   vec::Vec,
[INFO] [stdout]   |   ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]   --> src/ord/map.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ToOwned,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToOwned` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/ord/map.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Iterator,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]   --> src/ord/set.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ToOwned,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToOwned` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]   --> src/ord/set.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     IntoIterator,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]   --> src/vector.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     ToOwned,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToOwned` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/conslist.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Iterator,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]    --> src/conslist.rs:783:7
[INFO] [stdout]     |
[INFO] [stdout] 783 |   use alloc::string::String;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:156:28
[INFO] [stdout]     |
[INFO] [stdout] 156 |       s.serialize_element(i.deref())?;
[INFO] [stdout]     |                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:180:26
[INFO] [stdout]     |
[INFO] [stdout] 180 |       s.serialize_entry(k.deref(), v.deref())?;
[INFO] [stdout]     |                          ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `K` does not implement `Deref`, so calling `deref` on `&K` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:180:37
[INFO] [stdout]     |
[INFO] [stdout] 180 |       s.serialize_entry(k.deref(), v.deref())?;
[INFO] [stdout]     |                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `V` does not implement `Deref`, so calling `deref` on `&V` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:254:28
[INFO] [stdout]     |
[INFO] [stdout] 254 |       s.serialize_element(i.deref())?;
[INFO] [stdout]     |                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.05s
[INFO] running `Command { std: "docker" "inspect" "41139306d9090c552b0db4dc24da565763eb9baf7cc84b4ecdf03a6dd93dfcc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41139306d9090c552b0db4dc24da565763eb9baf7cc84b4ecdf03a6dd93dfcc0", kill_on_drop: false }`
[INFO] [stdout] 41139306d9090c552b0db4dc24da565763eb9baf7cc84b4ecdf03a6dd93dfcc0