[INFO] fetching crate eth2_ssz 0.4.0...
[INFO] checking eth2_ssz-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate eth2_ssz 0.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate eth2_ssz 0.4.0 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 eth2_ssz 0.4.0
[INFO] finished tweaking crates.io crate eth2_ssz 0.4.0
[INFO] tweaked toml for crates.io crate eth2_ssz 0.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate eth2_ssz 0.4.0 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 proc-macro-crate v1.1.0
[INFO] [stderr]   Downloaded arbitrary v1.0.3
[INFO] [stderr]   Downloaded rlp v0.5.1
[INFO] [stderr]   Downloaded ethereum-types v0.12.1
[INFO] [stderr]   Downloaded byte-slice-cast v1.2.0
[INFO] [stderr]   Downloaded primitive-types v0.10.1
[INFO] [stderr]   Downloaded darling_macro v0.13.0
[INFO] [stderr]   Downloaded impl-trait-for-tuples v0.2.1
[INFO] [stderr]   Downloaded eth2_ssz_derive v0.3.0
[INFO] [stderr]   Downloaded darling v0.13.0
[INFO] [stderr]   Downloaded arbitrary v0.4.7
[INFO] [stderr]   Downloaded darling_core v0.13.0
[INFO] [stderr]   Downloaded syn v1.0.81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1aef126d99673343efea45db7824bd1ea2efa6d1e67e63806ef142ae5601d0ee
[INFO] running `Command { std: "docker" "start" "-a" "1aef126d99673343efea45db7824bd1ea2efa6d1e67e63806ef142ae5601d0ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1aef126d99673343efea45db7824bd1ea2efa6d1e67e63806ef142ae5601d0ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1aef126d99673343efea45db7824bd1ea2efa6d1e67e63806ef142ae5601d0ee", kill_on_drop: false }`
[INFO] [stdout] 1aef126d99673343efea45db7824bd1ea2efa6d1e67e63806ef142ae5601d0ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 6a51d312b452373968cfcc804a778e783bce922431b3c9b7879506ab85e6a70d
[INFO] running `Command { std: "docker" "start" "-a" "6a51d312b452373968cfcc804a778e783bce922431b3c9b7879506ab85e6a70d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking byte-slice-cast v1.2.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking uint v0.9.1
[INFO] [stderr]     Checking rlp v0.5.1
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking bitvec v0.20.4
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking impl-serde v0.3.2
[INFO] [stderr]     Checking ethbloom v0.11.1
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.1
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling parity-scale-codec-derive v2.3.1
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling eth2_ssz_derive v0.3.0
[INFO] [stderr]     Checking parity-scale-codec v2.3.1
[INFO] [stderr]     Checking impl-codec v0.5.1
[INFO] [stderr]     Checking primitive-types v0.10.1
[INFO] [stderr]     Checking ethereum-types v0.12.1
[INFO] [stderr]     Checking eth2_ssz v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `SmallVec` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use smallvec::SmallVec;
[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:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use smallvec::SmallVec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.04s
[INFO] running `Command { std: "docker" "inspect" "6a51d312b452373968cfcc804a778e783bce922431b3c9b7879506ab85e6a70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a51d312b452373968cfcc804a778e783bce922431b3c9b7879506ab85e6a70d", kill_on_drop: false }`
[INFO] [stdout] 6a51d312b452373968cfcc804a778e783bce922431b3c9b7879506ab85e6a70d
[INFO] checking eth2_ssz-0.4.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate eth2_ssz 0.4.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate eth2_ssz 0.4.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate eth2_ssz 0.4.0
[INFO] finished tweaking crates.io crate eth2_ssz 0.4.0
[INFO] tweaked toml for crates.io crate eth2_ssz 0.4.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate eth2_ssz 0.4.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4a1cfc34b4ae860ffabf4171c0240dbf4aa592fb3f74d9360b1bdf06279c7e5
[INFO] running `Command { std: "docker" "start" "-a" "e4a1cfc34b4ae860ffabf4171c0240dbf4aa592fb3f74d9360b1bdf06279c7e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4a1cfc34b4ae860ffabf4171c0240dbf4aa592fb3f74d9360b1bdf06279c7e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a1cfc34b4ae860ffabf4171c0240dbf4aa592fb3f74d9360b1bdf06279c7e5", kill_on_drop: false }`
[INFO] [stdout] e4a1cfc34b4ae860ffabf4171c0240dbf4aa592fb3f74d9360b1bdf06279c7e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8aa9cd227ed0596de0af74fdb8de3a0ee8a0d664356d5f0f931502d578a58b98
[INFO] running `Command { std: "docker" "start" "-a" "8aa9cd227ed0596de0af74fdb8de3a0ee8a0d664356d5f0f931502d578a58b98", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking byte-slice-cast v1.2.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking uint v0.9.1
[INFO] [stderr]     Checking rlp v0.5.1
[INFO] [stderr]     Checking bitvec v0.20.4
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking impl-serde v0.3.2
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]     Checking ethbloom v0.11.1
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.1
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling parity-scale-codec-derive v2.3.1
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling eth2_ssz_derive v0.3.0
[INFO] [stderr]     Checking parity-scale-codec v2.3.1
[INFO] [stderr]     Checking impl-codec v0.5.1
[INFO] [stderr]     Checking primitive-types v0.10.1
[INFO] [stderr]     Checking ethereum-types v0.12.1
[INFO] [stderr]     Checking eth2_ssz v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `SmallVec` is imported redundantly
[INFO] [stdout]  --> src/decode/impls.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use smallvec::SmallVec;
[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:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `SmallVec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use smallvec::SmallVec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.01s
[INFO] running `Command { std: "docker" "inspect" "8aa9cd227ed0596de0af74fdb8de3a0ee8a0d664356d5f0f931502d578a58b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aa9cd227ed0596de0af74fdb8de3a0ee8a0d664356d5f0f931502d578a58b98", kill_on_drop: false }`
[INFO] [stdout] 8aa9cd227ed0596de0af74fdb8de3a0ee8a0d664356d5f0f931502d578a58b98