[INFO] fetching crate ark-relations-zkhub 0.4.7...
[INFO] checking ark-relations-zkhub-0.4.7 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate ark-relations-zkhub 0.4.7 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate ark-relations-zkhub 0.4.7 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ark-relations-zkhub 0.4.7
[INFO] finished tweaking crates.io crate ark-relations-zkhub 0.4.7
[INFO] tweaked toml for crates.io crate ark-relations-zkhub 0.4.7 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 85 packages to latest compatible versions
[INFO] [stderr]       Adding addr2line v0.22.0 (latest: v0.24.1)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.1.0)
[INFO] [stderr]       Adding gimli v0.29.0 (latest: v0.31.0)
[INFO] [stderr]       Adding hashbrown v0.13.2 (latest: v0.14.5)
[INFO] [stderr]       Adding hermit-abi v0.3.9 (latest: v0.4.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.13.0)
[INFO] [stderr]       Adding miniz_oxide v0.7.4 (latest: v0.8.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] [stderr]       Adding tracing-subscriber v0.2.25 (latest: v0.3.18)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-sys v0.52.0 (latest: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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 ark-test-curves v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 254e3f89ab15e89410cf005149ab8ea4008a9962953c9daae656d7b15b898388
[INFO] running `Command { std: "docker" "start" "-a" "254e3f89ab15e89410cf005149ab8ea4008a9962953c9daae656d7b15b898388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "254e3f89ab15e89410cf005149ab8ea4008a9962953c9daae656d7b15b898388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "254e3f89ab15e89410cf005149ab8ea4008a9962953c9daae656d7b15b898388", kill_on_drop: false }`
[INFO] [stdout] 254e3f89ab15e89410cf005149ab8ea4008a9962953c9daae656d7b15b898388
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df7e3a1b7e7d158aea74b1e2caace6b00eb83e129bf0d7cbeed12bb3885290de
[INFO] running `Command { std: "docker" "start" "-a" "df7e3a1b7e7d158aea74b1e2caace6b00eb83e129bf0d7cbeed12bb3885290de", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]    Compiling ark-serialize-derive v0.4.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-asm v0.4.2
[INFO] [stderr]    Compiling ark-ff-macros v0.4.2
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling async-recursion v1.1.1
[INFO] [stderr]     Checking zeroize v1.8.1
[INFO] [stderr]     Checking tokio v1.40.0
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ark-std v0.4.0
[INFO] [stderr]     Checking ark-serialize v0.4.2
[INFO] [stderr]     Checking ark-ff v0.4.2
[INFO] [stderr]     Checking ark-poly v0.4.2
[INFO] [stderr]     Checking ark-relations-zkhub v0.4.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `trace` is never read
[INFO] [stdout]    --> src/r1cs/constraint_system.rs:678:21
[INFO] [stdout]     |
[INFO] [stdout] 678 |                     trace = self.constraint_traces[i].as_ref().map_or_else(
[INFO] [stdout]     |                     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:7:5
[INFO] [stdout]     |
[INFO] [stdout] 7   |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` implied by `#[warn(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ark-ec v0.4.2
[INFO] [stderr]     Checking ark-test-curves v0.4.2
[INFO] [stdout] warning: value assigned to `trace` is never read
[INFO] [stdout]    --> src/r1cs/constraint_system.rs:678:21
[INFO] [stdout]     |
[INFO] [stdout] 678 |                     trace = self.constraint_traces[i].as_ref().map_or_else(
[INFO] [stdout]     |                     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:7:5
[INFO] [stdout]     |
[INFO] [stdout] 7   |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` implied by `#[warn(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 41.21s
[INFO] running `Command { std: "docker" "inspect" "df7e3a1b7e7d158aea74b1e2caace6b00eb83e129bf0d7cbeed12bb3885290de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df7e3a1b7e7d158aea74b1e2caace6b00eb83e129bf0d7cbeed12bb3885290de", kill_on_drop: false }`
[INFO] [stdout] df7e3a1b7e7d158aea74b1e2caace6b00eb83e129bf0d7cbeed12bb3885290de