[INFO] cloning repository https://github.com/jinjagit/par_iter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jinjagit/par_iter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjinjagit%2Fpar_iter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjinjagit%2Fpar_iter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12d959bdec2f0111c8b5d699635d95048fd47f21
[INFO] checking jinjagit/par_iter against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjinjagit%2Fpar_iter" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jinjagit/par_iter 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/jinjagit/par_iter
[INFO] finished tweaking git repo https://github.com/jinjagit/par_iter
[INFO] tweaked toml for git repo https://github.com/jinjagit/par_iter written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jinjagit/par_iter 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8920c833f1411b53dffcd1bc1ce0e506b184f58b3e443b098875d3eabc6cca88
[INFO] running `Command { std: "docker" "start" "-a" "8920c833f1411b53dffcd1bc1ce0e506b184f58b3e443b098875d3eabc6cca88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8920c833f1411b53dffcd1bc1ce0e506b184f58b3e443b098875d3eabc6cca88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8920c833f1411b53dffcd1bc1ce0e506b184f58b3e443b098875d3eabc6cca88", kill_on_drop: false }`
[INFO] [stdout] 8920c833f1411b53dffcd1bc1ce0e506b184f58b3e443b098875d3eabc6cca88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e8d0c0d83768d7186cd176d5dbaeca557bcfe3c6437e766a86d4bac9eba1b96f
[INFO] running `Command { std: "docker" "start" "-a" "e8d0c0d83768d7186cd176d5dbaeca557bcfe3c6437e766a86d4bac9eba1b96f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking par_iter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let a: Vec<f64> = vec.iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let a: Vec<f64> = vec.iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let a: Vec<f64> = vec.par_iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let a: Vec<f64> = vec.par_iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.69s
[INFO] running `Command { std: "docker" "inspect" "e8d0c0d83768d7186cd176d5dbaeca557bcfe3c6437e766a86d4bac9eba1b96f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8d0c0d83768d7186cd176d5dbaeca557bcfe3c6437e766a86d4bac9eba1b96f", kill_on_drop: false }`
[INFO] [stdout] e8d0c0d83768d7186cd176d5dbaeca557bcfe3c6437e766a86d4bac9eba1b96f
[INFO] checking jinjagit/par_iter against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjinjagit%2Fpar_iter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jinjagit/par_iter on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jinjagit/par_iter
[INFO] finished tweaking git repo https://github.com/jinjagit/par_iter
[INFO] tweaked toml for git repo https://github.com/jinjagit/par_iter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jinjagit/par_iter 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fc6ecb12b24bed129fc5cf0cd25dcb1e4819024d7e0d5b04637f8b1667c308c
[INFO] running `Command { std: "docker" "start" "-a" "5fc6ecb12b24bed129fc5cf0cd25dcb1e4819024d7e0d5b04637f8b1667c308c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fc6ecb12b24bed129fc5cf0cd25dcb1e4819024d7e0d5b04637f8b1667c308c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fc6ecb12b24bed129fc5cf0cd25dcb1e4819024d7e0d5b04637f8b1667c308c", kill_on_drop: false }`
[INFO] [stdout] 5fc6ecb12b24bed129fc5cf0cd25dcb1e4819024d7e0d5b04637f8b1667c308c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbc0c6d7bbba4a2c2cdd83ba190e4b7f219714af0a5848759dd8a9a1de6e618f
[INFO] running `Command { std: "docker" "start" "-a" "fbc0c6d7bbba4a2c2cdd83ba190e4b7f219714af0a5848759dd8a9a1de6e618f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking par_iter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let a: Vec<f64> = vec.iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let a: Vec<f64> = vec.iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let a: Vec<f64> = vec.par_iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let a: Vec<f64> = vec.par_iter().map(|x| x.sin().sqrt().atan()).collect();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.03s
[INFO] running `Command { std: "docker" "inspect" "fbc0c6d7bbba4a2c2cdd83ba190e4b7f219714af0a5848759dd8a9a1de6e618f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbc0c6d7bbba4a2c2cdd83ba190e4b7f219714af0a5848759dd8a9a1de6e618f", kill_on_drop: false }`
[INFO] [stdout] fbc0c6d7bbba4a2c2cdd83ba190e4b7f219714af0a5848759dd8a9a1de6e618f