[INFO] cloning repository https://github.com/zkfriendly/lFibo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zkfriendly/lFibo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzkfriendly%2FlFibo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzkfriendly%2FlFibo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f7eacd4e28025702f7f9ae04bf1d6d8a20844588
[INFO] checking zkfriendly/lFibo against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzkfriendly%2FlFibo" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zkfriendly/lFibo 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 git repo https://github.com/zkfriendly/lFibo
[INFO] finished tweaking git repo https://github.com/zkfriendly/lFibo
[INFO] tweaked toml for git repo https://github.com/zkfriendly/lFibo written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zkfriendly/lFibo 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded halo2_proofs v0.1.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efad11356c530cf89ea63b2c112141008fe6d28ad042970087a66b1bcd4d6ad1
[INFO] running `Command { std: "docker" "start" "-a" "efad11356c530cf89ea63b2c112141008fe6d28ad042970087a66b1bcd4d6ad1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efad11356c530cf89ea63b2c112141008fe6d28ad042970087a66b1bcd4d6ad1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efad11356c530cf89ea63b2c112141008fe6d28ad042970087a66b1bcd4d6ad1", kill_on_drop: false }`
[INFO] [stdout] efad11356c530cf89ea63b2c112141008fe6d28ad042970087a66b1bcd4d6ad1
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3015ae5399415ec7239ed935e6d15228347d3da74d42cf09f44f75e9149320fd
[INFO] running `Command { std: "docker" "start" "-a" "3015ae5399415ec7239ed935e6d15228347d3da74d42cf09f44f75e9149320fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking arrayref v0.3.7
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking constant_time_eq v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking blake2b_simd v1.0.2
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.4
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking ff v0.12.1
[INFO] [stderr]     Checking group v0.12.1
[INFO] [stderr]     Checking pasta_curves v0.4.1
[INFO] [stderr]     Checking halo2_proofs v0.1.0
[INFO] [stderr]     Checking fib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/fibo_circuit2/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct FiboCircuit<F: FieldExt> {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 10 |     pub a: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout] 11 |     pub b: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]   --> src/fibo_circuit2/fibo_chip.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ACell<F: FieldExt>(AssignedCell<F, F>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ACell` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/fibo_circuit2/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct FiboCircuit<F: FieldExt> {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 10 |     pub a: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout] 11 |     pub b: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]   --> src/fibo_circuit2/fibo_chip.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ACell<F: FieldExt>(AssignedCell<F, F>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ACell` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.48s
[INFO] running `Command { std: "docker" "inspect" "3015ae5399415ec7239ed935e6d15228347d3da74d42cf09f44f75e9149320fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3015ae5399415ec7239ed935e6d15228347d3da74d42cf09f44f75e9149320fd", kill_on_drop: false }`
[INFO] [stdout] 3015ae5399415ec7239ed935e6d15228347d3da74d42cf09f44f75e9149320fd
[INFO] checking zkfriendly/lFibo against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzkfriendly%2FlFibo" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zkfriendly/lFibo on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zkfriendly/lFibo
[INFO] finished tweaking git repo https://github.com/zkfriendly/lFibo
[INFO] tweaked toml for git repo https://github.com/zkfriendly/lFibo written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zkfriendly/lFibo 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3b21220109ae83a5df8734545b3544e01a5cd3da00cde74feeb4a34ff3243be
[INFO] running `Command { std: "docker" "start" "-a" "e3b21220109ae83a5df8734545b3544e01a5cd3da00cde74feeb4a34ff3243be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3b21220109ae83a5df8734545b3544e01a5cd3da00cde74feeb4a34ff3243be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3b21220109ae83a5df8734545b3544e01a5cd3da00cde74feeb4a34ff3243be", kill_on_drop: false }`
[INFO] [stdout] e3b21220109ae83a5df8734545b3544e01a5cd3da00cde74feeb4a34ff3243be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c64b8d36b041a3ac088d524a81d120fee56a9eccff257f5be34122586cc8e674
[INFO] running `Command { std: "docker" "start" "-a" "c64b8d36b041a3ac088d524a81d120fee56a9eccff257f5be34122586cc8e674", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking constant_time_eq v0.3.0
[INFO] [stderr]     Checking arrayref v0.3.7
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking blake2b_simd v1.0.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.4
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking ff v0.12.1
[INFO] [stderr]     Checking group v0.12.1
[INFO] [stderr]     Checking pasta_curves v0.4.1
[INFO] [stderr]     Checking halo2_proofs v0.1.0
[INFO] [stderr]     Checking fib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/fibo_circuit2/fibo_chip.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Advice` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Advice` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Column` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                   ^^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Column` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]  --> src/fibo_circuit/fibo_chip.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use halo2_proofs::plonk::{Advice, Column, Error};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use halo2_proofs::poly::Rotation;
[INFO] [stdout] 4 | use halo2_proofs::{arithmetic::FieldExt, plonk::*};
[INFO] [stdout]   |                                          -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/fibo_circuit2/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct FiboCircuit<F: FieldExt> {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 10 |     pub a: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout] 11 |     pub b: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]   --> src/fibo_circuit2/fibo_chip.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ACell<F: FieldExt>(AssignedCell<F, F>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ACell` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/fibo_circuit2/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct FiboCircuit<F: FieldExt> {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 10 |     pub a: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout] 11 |     pub b: Option<F>,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]   --> src/fibo_circuit2/fibo_chip.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ACell<F: FieldExt>(AssignedCell<F, F>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ACell` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.80s
[INFO] running `Command { std: "docker" "inspect" "c64b8d36b041a3ac088d524a81d120fee56a9eccff257f5be34122586cc8e674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c64b8d36b041a3ac088d524a81d120fee56a9eccff257f5be34122586cc8e674", kill_on_drop: false }`
[INFO] [stdout] c64b8d36b041a3ac088d524a81d120fee56a9eccff257f5be34122586cc8e674