[INFO] fetching crate ethereum_ssz 0.5.3...
[INFO] checking ethereum_ssz-0.5.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ethereum_ssz 0.5.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate ethereum_ssz 0.5.3 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 ethereum_ssz 0.5.3
[INFO] finished tweaking crates.io crate ethereum_ssz 0.5.3
[INFO] tweaked toml for crates.io crate ethereum_ssz 0.5.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate ethereum_ssz 0.5.3 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ethereum_ssz_derive v0.5.3
[INFO] [stderr]   Downloaded primitive-types v0.12.1
[INFO] [stderr]   Downloaded arbitrary v1.3.0
[INFO] [stderr]   Downloaded toml_datetime v0.6.2
[INFO] [stderr]   Downloaded parity-scale-codec-derive v3.1.4
[INFO] [stderr]   Downloaded arrayvec v0.7.3
[INFO] [stderr]   Downloaded winnow v0.4.6
[INFO] [stderr]   Downloaded toml_edit v0.19.10
[INFO] [stderr]   Downloaded parity-scale-codec v3.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 041e6943d558f9b20113898d4b259daff0b91248377508dbf42506fc349ff4d8
[INFO] running `Command { std: "docker" "start" "-a" "041e6943d558f9b20113898d4b259daff0b91248377508dbf42506fc349ff4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "041e6943d558f9b20113898d4b259daff0b91248377508dbf42506fc349ff4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "041e6943d558f9b20113898d4b259daff0b91248377508dbf42506fc349ff4d8", kill_on_drop: false }`
[INFO] [stdout] 041e6943d558f9b20113898d4b259daff0b91248377508dbf42506fc349ff4d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2e701803a08e34cec1ca27e92f54792bb131a28f3de906725f8b63fe9f7704cb
[INFO] running `Command { std: "docker" "start" "-a" "2e701803a08e34cec1ca27e92f54792bb131a28f3de906725f8b63fe9f7704cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rlp v0.5.2
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]     Checking fixed-hash v0.8.0
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling ethereum_ssz_derive v0.5.3
[INFO] [stderr]     Checking impl-serde v0.4.0
[INFO] [stderr]     Checking primitive-types v0.12.1
[INFO] [stderr]     Checking ethbloom v0.13.0
[INFO] [stderr]     Checking ethereum-types v0.14.1
[INFO] [stderr]     Checking ethereum_ssz v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFromIter` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:2:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TryFromIter` is already imported here
[INFO] [stdout] 2 | use crate::decode::try_from_iter::{TryCollect, TryFromIter};
[INFO] [stdout]   |                                                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFromIter` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:2:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TryFromIter` is already imported here
[INFO] [stdout] 2 | use crate::decode::try_from_iter::{TryCollect, TryFromIter};
[INFO] [stdout]   |                                                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SmallVec` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use smallvec::SmallVec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SmallVec` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use smallvec::SmallVec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::{self, FromIterator};
[INFO] [stdout]   |                       ^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::{self, FromIterator};
[INFO] [stdout]   |                       ^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> tests/tests.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     use std::iter::FromIterator;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.13s
[INFO] running `Command { std: "docker" "inspect" "2e701803a08e34cec1ca27e92f54792bb131a28f3de906725f8b63fe9f7704cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e701803a08e34cec1ca27e92f54792bb131a28f3de906725f8b63fe9f7704cb", kill_on_drop: false }`
[INFO] [stdout] 2e701803a08e34cec1ca27e92f54792bb131a28f3de906725f8b63fe9f7704cb