[INFO] fetching crate bellperson-nonnative 0.4.0...
[INFO] checking bellperson-nonnative-0.4.0 against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] extracting crate bellperson-nonnative 0.4.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate bellperson-nonnative 0.4.0
[INFO] finished tweaking crates.io crate bellperson-nonnative 0.4.0
[INFO] tweaked toml for crates.io crate bellperson-nonnative 0.4.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate bellperson-nonnative 0.4.0 on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "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" "+82310651b93a594a3fd69015e1562186a080d94c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 94 packages to latest compatible versions
[INFO] [stderr]       Adding bellperson v0.24.1 (available: v0.26.0)
[INFO] [stderr]       Adding ff v0.12.1 (available: v0.13.1)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ec-gpu v0.2.0
[INFO] [stderr]   Downloaded ff_derive v0.12.1
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[INFO] [stderr]   Downloaded ec-gpu-gen v0.5.2
[INFO] [stderr]   Downloaded blst v0.3.15
[INFO] [stderr]   Downloaded bellperson v0.24.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4605b8502ce869df503906ac3dedce99c687fc11b657912d0d04ed4040ae82a4
[INFO] running `Command { std: "docker" "start" "-a" "4605b8502ce869df503906ac3dedce99c687fc11b657912d0d04ed4040ae82a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4605b8502ce869df503906ac3dedce99c687fc11b657912d0d04ed4040ae82a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4605b8502ce869df503906ac3dedce99c687fc11b657912d0d04ed4040ae82a4", kill_on_drop: false }`
[INFO] [stdout] 4605b8502ce869df503906ac3dedce99c687fc11b657912d0d04ed4040ae82a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b581a61f844f2220d5c4ab99d1222b13ef610149504b18068370860a5a9adc2
[INFO] running `Command { std: "docker" "start" "-a" "2b581a61f844f2220d5c4ab99d1222b13ef610149504b18068370860a5a9adc2", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bellperson v0.24.1
[INFO] [stderr]     Checking bellperson-nonnative v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `grab_mut` is never used
[INFO] [stdout]   --> src/lib.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | trait OptionExt<T> {
[INFO] [stdout]    |       --------- method in this trait
[INFO] [stdout] 15 |     fn grab(&self) -> Result<&T, SynthesisError>;
[INFO] [stdout] 16 |     fn grab_mut(&mut self) -> Result<&mut T, SynthesisError>;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/util/lazy.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn borrow(&self) -> Ref<T> {
[INFO] [stdout]    |                   ^^^^^     ------ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn borrow(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&BigInt` instead of cloning the inner type
[INFO] [stdout]     --> src/mp/bignat.rs:1293:32
[INFO] [stdout]      |
[INFO] [stdout] 1293 |             || Ok(value.grab()?.clone().clone()),
[INFO] [stdout]      |                                ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grab_mut` is never used
[INFO] [stdout]   --> src/lib.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | trait OptionExt<T> {
[INFO] [stdout]    |       --------- method in this trait
[INFO] [stdout] 15 |     fn grab(&self) -> Result<&T, SynthesisError>;
[INFO] [stdout] 16 |     fn grab_mut(&mut self) -> Result<&mut T, SynthesisError>;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/util/lazy.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn borrow(&self) -> Ref<T> {
[INFO] [stdout]    |                   ^^^^^     ------ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn borrow(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&num_bigint::BigInt` instead of cloning the inner type
[INFO] [stdout]     --> src/mp/bignat.rs:1293:32
[INFO] [stdout]      |
[INFO] [stdout] 1293 |             || Ok(value.grab()?.clone().clone()),
[INFO] [stdout]      |                                ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 29s
[INFO] running `Command { std: "docker" "inspect" "2b581a61f844f2220d5c4ab99d1222b13ef610149504b18068370860a5a9adc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b581a61f844f2220d5c4ab99d1222b13ef610149504b18068370860a5a9adc2", kill_on_drop: false }`
[INFO] [stdout] 2b581a61f844f2220d5c4ab99d1222b13ef610149504b18068370860a5a9adc2
