[INFO] fetching crate halo2-axiom 0.4.1...
[INFO] checking halo2-axiom-0.4.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate halo2-axiom 0.4.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate halo2-axiom 0.4.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate halo2-axiom 0.4.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate halo2-axiom 0.4.1
[INFO] tweaked toml for crates.io crate halo2-axiom 0.4.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate halo2-axiom 0.4.1 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gumdrop v0.8.1
[INFO] [stderr]   Downloaded gumdrop_derive v0.8.1
[INFO] [stderr]   Downloaded ark-std v0.3.0
[INFO] [stderr]   Downloaded tabbycat v0.1.2
[INFO] [stderr]   Downloaded serde_arrays v0.1.0
[INFO] [stderr]   Downloaded halo2_legacy_pdqsort v0.1.0
[INFO] [stderr]   Downloaded rusty-fork v0.3.0
[INFO] [stderr]   Downloaded proptest v1.2.0
[INFO] [stderr]   Downloaded maybe-rayon v0.1.1
[INFO] [stderr]   Downloaded halo2curves-axiom v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36246f32fd113f408033011842e81b37d7a51564ce7833a6a08f179c6531d9eb
[INFO] running `Command { std: "docker" "start" "-a" "36246f32fd113f408033011842e81b37d7a51564ce7833a6a08f179c6531d9eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36246f32fd113f408033011842e81b37d7a51564ce7833a6a08f179c6531d9eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36246f32fd113f408033011842e81b37d7a51564ce7833a6a08f179c6531d9eb", kill_on_drop: false }`
[INFO] [stdout] 36246f32fd113f408033011842e81b37d7a51564ce7833a6a08f179c6531d9eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33f80ea0e86347acbe13ecfb88a09748cc88d7db1876f868af80ea5338e0455f
[INFO] running `Command { std: "docker" "start" "-a" "33f80ea0e86347acbe13ecfb88a09748cc88d7db1876f868af80ea5338e0455f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
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[INFO] [stderr]    Compiling serde v1.0.183
[INFO] [stderr]    Compiling num-traits v0.2.16
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[INFO] [stderr]    Compiling gumdrop_derive v0.8.1
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[INFO] [stderr]    Compiling tracing-attributes v0.1.26
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking halo2-axiom v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Scope`
[INFO] [stdout]   --> src/multicore.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     join, scope, Scope,
[INFO] [stdout]    |                  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/plonk/circuit.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ExactSizeIterator` is imported redundantly
[INFO] [stdout]  --> src/plonk/permutation/prover.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{self, ExactSizeIterator};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ExactSizeIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/transcript.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Scope`
[INFO] [stdout]   --> src/multicore.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     join, scope, Scope,
[INFO] [stdout]    |                  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/plonk/circuit.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ExactSizeIterator` is imported redundantly
[INFO] [stdout]  --> src/plonk/permutation/prover.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{self, ExactSizeIterator};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ExactSizeIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]    --> src/poly/kzg/multiopen/shplonk.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use std::convert::TryFrom;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/transcript.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PointIndex` is never constructed
[INFO] [stdout]     --> src/plonk/circuit.rs:1422:19
[INFO] [stdout]      |
[INFO] [stdout] 1422 | pub(crate) struct PointIndex(pub usize);
[INFO] [stdout]      |                   ^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Variable` is never constructed
[INFO] [stdout]   --> benches/plonk.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub struct Variable(Column<Advice>, usize);
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Variable` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PointIndex` is never constructed
[INFO] [stdout]     --> src/plonk/circuit.rs:1422:19
[INFO] [stdout]      |
[INFO] [stdout] 1422 | pub(crate) struct PointIndex(pub usize);
[INFO] [stdout]      |                   ^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.01s
[INFO] running `Command { std: "docker" "inspect" "33f80ea0e86347acbe13ecfb88a09748cc88d7db1876f868af80ea5338e0455f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33f80ea0e86347acbe13ecfb88a09748cc88d7db1876f868af80ea5338e0455f", kill_on_drop: false }`
[INFO] [stdout] 33f80ea0e86347acbe13ecfb88a09748cc88d7db1876f868af80ea5338e0455f