[INFO] fetching crate arkworks-circuits 0.4.20...
[INFO] checking arkworks-circuits-0.4.20 against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] extracting crate arkworks-circuits 0.4.20 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate arkworks-circuits 0.4.20
[INFO] finished tweaking crates.io crate arkworks-circuits 0.4.20
[INFO] tweaked toml for crates.io crate arkworks-circuits 0.4.20 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate arkworks-circuits 0.4.20 on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 92 packages to latest compatible versions
[INFO] [stderr]       Adding ark-bls12-381 v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-bn254 v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-crypto-primitives v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-ec v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-ed-on-bls12-381 v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-ed-on-bn254 v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-ff v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-groth16 v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-poly v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-poly-commit v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-r1cs-std v0.3.1 (available: v0.5.0)
[INFO] [stderr]       Adding ark-relations v0.3.0 (available: v0.5.1)
[INFO] [stderr]       Adding ark-serialize v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding ark-snark v0.3.0 (available: v0.5.1)
[INFO] [stderr]       Adding ark-std v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding arkworks-utils v0.4.20 (available: v1.0.1)
[INFO] [stderr]       Adding blake2 v0.9.2 (available: v0.10.6)
[INFO] [stderr]       Adding digest v0.9.0 (available: v0.11.2)
[INFO] [stderr]       Adding ethabi v15.0.0 (available: v18.0.0)
[INFO] [stderr]       Adding hex-literal v0.3.4 (available: v1.1.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fb1da7b1cc6718001f74ed09c96b98500430bbb7f1756d4cd176b10a799d219
[INFO] running `Command { std: "docker" "start" "-a" "5fb1da7b1cc6718001f74ed09c96b98500430bbb7f1756d4cd176b10a799d219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb1da7b1cc6718001f74ed09c96b98500430bbb7f1756d4cd176b10a799d219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb1da7b1cc6718001f74ed09c96b98500430bbb7f1756d4cd176b10a799d219", kill_on_drop: false }`
[INFO] [stdout] 5fb1da7b1cc6718001f74ed09c96b98500430bbb7f1756d4cd176b10a799d219
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cf8d72dd395f4fa5aecd3246ddb289eccdfa9c2d740509f01e7a350417cadfd
[INFO] running `Command { std: "docker" "start" "-a" "6cf8d72dd395f4fa5aecd3246ddb289eccdfa9c2d740509f01e7a350417cadfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling pest v2.8.6
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking keccak v0.1.6
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking primitive-types v0.10.1
[INFO] [stderr]     Checking ethbloom v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking ark-std v0.3.0
[INFO] [stderr]     Checking ethereum-types v0.12.1
[INFO] [stderr]    Compiling semver-parser v0.10.3
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]     Checking ethabi v15.0.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling ark-ff v0.3.0
[INFO] [stderr]    Compiling zeroize_derive v1.4.3
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling ark-serialize-derive v0.3.0
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]     Checking ark-serialize v0.3.0
[INFO] [stderr]     Checking zeroize v1.8.2
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-relations v0.3.0
[INFO] [stderr]     Checking ark-poly v0.3.0
[INFO] [stderr]     Checking ark-snark v0.3.0
[INFO] [stderr]     Checking ark-r1cs-std v0.3.1
[INFO] [stderr]     Checking ark-poly-commit v0.3.0
[INFO] [stderr]     Checking ark-bn254 v0.3.0
[INFO] [stderr]     Checking ark-bls12-381 v0.3.0
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ark-poly-commit-0.3.0/src/marlin/marlin_pst13_pc/data_structures.rs:566:24
[INFO] [stdout]     |
[INFO] [stdout] 566 |             .collect::<Result<_, _>>()?;
[INFO] [stdout]     |              -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]     |              |
[INFO] [stdout]     |              required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<A, E>>` is implemented for `Result<V, E>`
[INFO] [stdout]    --> /rustc/88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c/library/core/src/result.rs:2109:0
[INFO] [stdout]     = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]     = help: you might have intended to use the type `()` here instead
[INFO] [stdout]     = note: required for `Result<!, ark_std::io::Error>` to implement `FromIterator<Result<(), ark_std::io::Error>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]    --> /rustc/88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c/library/core/src/iter/traits/iterator.rs:2079:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ark-poly-commit` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6cf8d72dd395f4fa5aecd3246ddb289eccdfa9c2d740509f01e7a350417cadfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cf8d72dd395f4fa5aecd3246ddb289eccdfa9c2d740509f01e7a350417cadfd", kill_on_drop: false }`
[INFO] [stdout] 6cf8d72dd395f4fa5aecd3246ddb289eccdfa9c2d740509f01e7a350417cadfd