[INFO] cloning repository https://github.com/SoliditySavvy/Halo2Workflow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SoliditySavvy/Halo2Workflow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSoliditySavvy%2FHalo2Workflow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSoliditySavvy%2FHalo2Workflow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4f7ab6129875038f71842acf8b2146fc082e884
[INFO] checking SoliditySavvy/Halo2Workflow against master#b0696a5160711c068cb1f01b7437db7990d15750 for pr-121848
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSoliditySavvy%2FHalo2Workflow" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SoliditySavvy/Halo2Workflow on toolchain b0696a5160711c068cb1f01b7437db7990d15750
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] finished tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] tweaked toml for git repo https://github.com/SoliditySavvy/Halo2Workflow written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/SoliditySavvy/Halo2Workflow 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" "+b0696a5160711c068cb1f01b7437db7990d15750" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking SoliditySavvy/Halo2Workflow against try#bfe97fcae016881ad333f0ff8cea2cadb9cf136c for pr-121848
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSoliditySavvy%2FHalo2Workflow" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SoliditySavvy/Halo2Workflow on toolchain bfe97fcae016881ad333f0ff8cea2cadb9cf136c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] finished tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] tweaked toml for git repo https://github.com/SoliditySavvy/Halo2Workflow written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/SoliditySavvy/Halo2Workflow 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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/zcash/halo2.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking SoliditySavvy/Halo2Workflow against try#bfe97fcae016881ad333f0ff8cea2cadb9cf136c for pr-121848
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSoliditySavvy%2FHalo2Workflow" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SoliditySavvy/Halo2Workflow on toolchain bfe97fcae016881ad333f0ff8cea2cadb9cf136c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] finished tweaking git repo https://github.com/SoliditySavvy/Halo2Workflow
[INFO] tweaked toml for git repo https://github.com/SoliditySavvy/Halo2Workflow written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/SoliditySavvy/Halo2Workflow 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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pasta_curves v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6df44952486be5ba442e9b96e2a2349875274cc3718da46219fbd887dbf9438f
[INFO] running `Command { std: "docker" "start" "-a" "6df44952486be5ba442e9b96e2a2349875274cc3718da46219fbd887dbf9438f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6df44952486be5ba442e9b96e2a2349875274cc3718da46219fbd887dbf9438f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df44952486be5ba442e9b96e2a2349875274cc3718da46219fbd887dbf9438f", kill_on_drop: false }`
[INFO] [stdout] 6df44952486be5ba442e9b96e2a2349875274cc3718da46219fbd887dbf9438f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7a8a1ce7ab461262b5b42d668bc1f2dbe214a4d12dedffce4c2fccd8c5d8669
[INFO] running `Command { std: "docker" "start" "-a" "e7a8a1ce7ab461262b5b42d668bc1f2dbe214a4d12dedffce4c2fccd8c5d8669", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking wyz v0.5.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking bitvec v1.0.0
[INFO] [stderr]     Checking blake2b_simd v1.0.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking ff v0.12.0
[INFO] [stderr]     Checking group v0.12.0
[INFO] [stderr]     Checking pasta_curves v0.4.0
[INFO] [stderr]     Checking halo2_proofs v0.1.0 (https://github.com/zcash/halo2.git?rev=a898d65ae3ad3d41987666f6a03cfc15edae01c4#a898d65a)
[INFO] [stderr]     Checking fibonacci v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Constraints`, `Expression`, `TableColumn`
[INFO] [stdout]  --> src/range_check/example3_broken.rs:5:53
[INFO] [stdout]   |
[INFO] [stdout] 5 |         Advice, Assigned, Column, ConstraintSystem, Constraints, Error, Expression, Selector,
[INFO] [stdout]   |                                                     ^^^^^^^^^^^         ^^^^^^^^^^
[INFO] [stdout] 6 |         TableColumn,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Constraints`, `Expression`, `TableColumn`
[INFO] [stdout]  --> src/range_check/example3_broken.rs:5:53
[INFO] [stdout]   |
[INFO] [stdout] 5 |         Advice, Assigned, Column, ConstraintSystem, Constraints, Error, Expression, Selector,
[INFO] [stdout]   |                                                     ^^^^^^^^^^^         ^^^^^^^^^^
[INFO] [stdout] 6 |         TableColumn,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Any`, `FailureLocation`, `VerifyFailure`
[INFO] [stdout]    --> src/range_check/example3_broken.rs:115:15
[INFO] [stdout]     |
[INFO] [stdout] 115 |         dev::{FailureLocation, MockProver, VerifyFailure},
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^              ^^^^^^^^^^^^^
[INFO] [stdout] 116 |         pasta::Fp,
[INFO] [stdout] 117 |         plonk::{Any, Circuit},
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]  --> src/fibonacci/example2.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | 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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RangeConstrained` is never constructed
[INFO] [stdout]   --> src/range_check/example1.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct RangeConstrained<F: FieldExt, const RANGE: usize>(AssignedCell<Assigned<F>, F>);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeConstrained` 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: struct `RangeCheckConfig` is never constructed
[INFO] [stdout]   --> src/range_check/example1.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct RangeCheckConfig<F: FieldExt, const RANGE: usize> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeCheckConfig` 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: associated items `configure` and `assign` are never used
[INFO] [stdout]   --> src/range_check/example1.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<F: FieldExt, const RANGE: usize> RangeCheckConfig<F, RANGE> {
[INFO] [stdout]    | ---------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 29 |     pub fn configure(meta: &mut ConstraintSystem<F>, value: Column<Advice>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn assign(
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RangeConstrained` is never constructed
[INFO] [stdout]   --> src/range_check/example2.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct RangeConstrained<F: FieldExt, const RANGE: usize>(AssignedCell<Assigned<F>, F>);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeConstrained` 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: struct `RangeCheckConfig` is never constructed
[INFO] [stdout]   --> src/range_check/example2.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct RangeCheckConfig<F: FieldExt, const RANGE: usize, const LOOKUP_RANGE: usize> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeCheckConfig` 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: associated items `configure`, `assign_simple`, and `assign_lookup` are never used
[INFO] [stdout]   --> src/range_check/example2.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | / impl<F: FieldExt, const RANGE: usize, const LOOKUP_RANGE: usize>
[INFO] [stdout] 34 | |     RangeCheckConfig<F, RANGE, LOOKUP_RANGE>
[INFO] [stdout]    | |____________________________________________- associated items in this implementation
[INFO] [stdout] 35 |   {
[INFO] [stdout] 36 |       pub fn configure(meta: &mut ConstraintSystem<F>, value: Column<Advice>) -> Self {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |       pub fn assign_simple(
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |       pub fn assign_lookup(
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RangeTableConfig` is never constructed
[INFO] [stdout]   --> src/range_check/example2/table.rs:11:19
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(super) struct RangeTableConfig<F: FieldExt, const RANGE: usize> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeTableConfig` 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: associated items `configure` and `load` are never used
[INFO] [stdout]   --> src/range_check/example2/table.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<F: FieldExt, const RANGE: usize> RangeTableConfig<F, RANGE> {
[INFO] [stdout]    | ---------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 17 |     pub(super) fn configure(meta: &mut ConstraintSystem<F>) -> Self {
[INFO] [stdout]    |                   ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub(super) fn load(&self, layouter: &mut impl Layouter<F>) -> Result<(), Error> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RangeConstrained` is never constructed
[INFO] [stdout]   --> src/range_check/example3_broken.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct RangeConstrained<F: FieldExt> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeConstrained` 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: struct `RangeCheckConfig` is never constructed
[INFO] [stdout]   --> src/range_check/example3_broken.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct RangeCheckConfig<F: FieldExt, const NUM_BITS: usize, const RANGE: usize> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeCheckConfig` 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: associated items `configure` and `assign` are never used
[INFO] [stdout]   --> src/range_check/example3_broken.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<F: FieldExt, const NUM_BITS: usize, const RANGE: usize> RangeCheckConfig<F, NUM_BITS, RANGE> {
[INFO] [stdout]    | ------------------------------------------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 46 |     pub fn configure(
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn assign(
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RangeTableConfig` is never constructed
[INFO] [stdout]   --> src/range_check/example3_broken/table.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(super) struct RangeTableConfig<F: FieldExt, const NUM_BITS: usize, const RANGE: usize> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeTableConfig` 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: associated items `configure` and `load` are never used
[INFO] [stdout]   --> src/range_check/example3_broken/table.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<F: FieldExt, const NUM_BITS: usize, const RANGE: usize> RangeTableConfig<F, NUM_BITS, RANGE> {
[INFO] [stdout]    | ------------------------------------------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 20 |     pub(super) fn configure(meta: &mut ConstraintSystem<F>) -> Self {
[INFO] [stdout]    |                   ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub(super) fn load(&self, layouter: &mut impl Layouter<F>) -> Result<(), Error> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ACell` is never constructed
[INFO] [stdout]  --> src/fibonacci/example2.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | 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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `num_bits` and `assigned_cell` are never read
[INFO] [stdout]   --> src/range_check/example3_broken.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct RangeConstrained<F: FieldExt> {
[INFO] [stdout]    |        ---------------- fields in this struct
[INFO] [stdout] 33 |     num_bits: AssignedCell<Assigned<F>, F>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 34 |     assigned_cell: AssignedCell<Assigned<F>, F>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RangeConstrained` 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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.73s
[INFO] running `Command { std: "docker" "inspect" "e7a8a1ce7ab461262b5b42d668bc1f2dbe214a4d12dedffce4c2fccd8c5d8669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7a8a1ce7ab461262b5b42d668bc1f2dbe214a4d12dedffce4c2fccd8c5d8669", kill_on_drop: false }`
[INFO] [stdout] e7a8a1ce7ab461262b5b42d668bc1f2dbe214a4d12dedffce4c2fccd8c5d8669
