[INFO] fetching crate gosh-linesearch 0.1.0...
[INFO] checking gosh-linesearch-0.1.0 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] extracting crate gosh-linesearch 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate gosh-linesearch 0.1.0 on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gosh-linesearch 0.1.0
[INFO] finished tweaking crates.io crate gosh-linesearch 0.1.0
[INFO] tweaked toml for crates.io crate gosh-linesearch 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3774ddd38a1dc8fa04d1d413e54bdc0f68f502d636cf98fe26c23d2a17453b0
[INFO] running `Command { std: "docker" "start" "-a" "f3774ddd38a1dc8fa04d1d413e54bdc0f68f502d636cf98fe26c23d2a17453b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3774ddd38a1dc8fa04d1d413e54bdc0f68f502d636cf98fe26c23d2a17453b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3774ddd38a1dc8fa04d1d413e54bdc0f68f502d636cf98fe26c23d2a17453b0", kill_on_drop: false }`
[INFO] [stdout] f3774ddd38a1dc8fa04d1d413e54bdc0f68f502d636cf98fe26c23d2a17453b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c155fced1461d01da2a401a85b52603fef18ba43e14b4eef8278406177090591
[INFO] running `Command { std: "docker" "start" "-a" "c155fced1461d01da2a401a85b52603fef18ba43e14b4eef8278406177090591", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking os_str_bytes v6.5.1
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking shared_child v1.0.0
[INFO] [stderr]     Checking os_pipe v1.1.4
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking shell-escape v0.1.5
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking duct v0.13.6
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking env_logger v0.9.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.2.25
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking gchemol-gut v0.3.1
[INFO] [stderr]     Checking gosh-linesearch v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:414:21
[INFO] [stdout]     |
[INFO] [stdout] 414 |                 let mut ls = LineSearchIter {
[INFO] [stdout]     |                     ----^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:414:21
[INFO] [stdout]     |
[INFO] [stdout] 414 |                 let mut ls = LineSearchIter {
[INFO] [stdout]     |                     ----^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `step`
[INFO] [stdout]    --> src/lib.rs:453:13
[INFO] [stdout]     |
[INFO] [stdout] 453 |     let mut step = 1.0;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_step`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/lib.rs:457:21
[INFO] [stdout]     |
[INFO] [stdout] 457 |         .find_iter(|a: f64, out: &mut Output| {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:453:9
[INFO] [stdout]     |
[INFO] [stdout] 453 |     let mut step = 1.0;
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0716]: temporary value dropped while borrowed
[INFO] [stdout]    --> src/lib.rs:454:14
[INFO] [stdout]     |
[INFO] [stdout] 454 |       let ls = linesearch()
[INFO] [stdout]     |  ______________^
[INFO] [stdout] 455 | |         .with_initial_step(1.5) // the default is 1.0
[INFO] [stdout] 456 | |         .with_algorithm("BackTracking") // the default is MoreThuente
[INFO] [stdout]     | |_______________________________________^ creates a temporary value which is freed while still in use
[INFO] [stdout] ...
[INFO] [stdout] 471 |           });
[INFO] [stdout]     |             - temporary value is freed at the end of this statement
[INFO] [stdout] 472 |
[INFO] [stdout] 473 |       for x in ls.take(5) {
[INFO] [stdout]     |                -- borrow later used here
[INFO] [stdout]     |
[INFO] [stdout] help: consider using a `let` binding to create a longer lived value
[INFO] [stdout]     |
[INFO] [stdout] 454 ~     let binding = linesearch()
[INFO] [stdout] 455 +         .with_initial_step(1.5) // the default is 1.0
[INFO] [stdout] 456 +         .with_algorithm("BackTracking");
[INFO] [stdout] 457 ~     let ls = binding // the default is MoreThuente
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0716`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gosh-linesearch` (lib test) due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c155fced1461d01da2a401a85b52603fef18ba43e14b4eef8278406177090591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c155fced1461d01da2a401a85b52603fef18ba43e14b4eef8278406177090591", kill_on_drop: false }`
[INFO] [stdout] c155fced1461d01da2a401a85b52603fef18ba43e14b4eef8278406177090591