[INFO] fetching crate libm 0.2.1...
[INFO] testing libm-0.2.1 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate libm 0.2.1 into /workspace/builds/worker-65/source
[INFO] validating manifest of crates.io crate libm 0.2.1 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libm 0.2.1
[INFO] finished tweaking crates.io crate libm 0.2.1
[INFO] tweaked toml for crates.io crate libm 0.2.1 written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c67168d3d1289782d516afe7c3894e630f61f84696f6d30b140e5fc08b5f1817
[INFO] running `Command { std: "docker" "start" "-a" "c67168d3d1289782d516afe7c3894e630f61f84696f6d30b140e5fc08b5f1817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c67168d3d1289782d516afe7c3894e630f61f84696f6d30b140e5fc08b5f1817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c67168d3d1289782d516afe7c3894e630f61f84696f6d30b140e5fc08b5f1817", kill_on_drop: false }`
[INFO] [stdout] c67168d3d1289782d516afe7c3894e630f61f84696f6d30b140e5fc08b5f1817
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34d6c4f537a0a7548c0ccea1a3554f58c1fe1dd491d49947c69ada62fa3bae16
[INFO] running `Command { std: "docker" "start" "-a" "34d6c4f537a0a7548c0ccea1a3554f58c1fe1dd491d49947c69ada62fa3bae16", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "34d6c4f537a0a7548c0ccea1a3554f58c1fe1dd491d49947c69ada62fa3bae16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34d6c4f537a0a7548c0ccea1a3554f58c1fe1dd491d49947c69ada62fa3bae16", kill_on_drop: false }`
[INFO] [stdout] 34d6c4f537a0a7548c0ccea1a3554f58c1fe1dd491d49947c69ada62fa3bae16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35c7202b9990ad4458aa7eebc718c1ab2e7c7ce7a982084203c555faa6ae45dd
[INFO] running `Command { std: "docker" "start" "-a" "35c7202b9990ad4458aa7eebc718c1ab2e7c7ce7a982084203c555faa6ae45dd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling no-panic v0.1.15
[INFO] [stderr]    Compiling libm v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused borrow that must be used
[INFO] [stdout]    --> src/math/pow.rs:607:9
[INFO] [stdout]     |
[INFO] [stdout] 607 | /         &[POS_ZERO, NEG_ZERO, POS_ONE, NEG_ONE, POS_EVENS, NEG_EVENS]
[INFO] [stdout] 608 | |             .iter()
[INFO] [stdout] 609 | |             .for_each(|int_set| {
[INFO] [stdout] 610 | |                 int_set.iter().for_each(|int| {
[INFO] [stdout] ...   |
[INFO] [stdout] 614 | |                 })
[INFO] [stdout] 615 | |             });
[INFO] [stdout]     | |______________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:2:9
[INFO] [stdout]     |
[INFO] [stdout] 2   | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 607 |         let _ = &[POS_ZERO, NEG_ZERO, POS_ONE, NEG_ONE, POS_EVENS, NEG_EVENS]
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused borrow that must be used
[INFO] [stdout]    --> src/math/pow.rs:619:9
[INFO] [stdout]     |
[INFO] [stdout] 619 | /         &NEG[1..(NEG.len() - 1)].iter().for_each(|set| {
[INFO] [stdout] 620 | |             set.iter().for_each(|val| {
[INFO] [stdout] 621 | |                 test_sets(&ALL[3..7], &|v: f64| pow(*val, v), &|_| NAN);
[INFO] [stdout] 622 | |             })
[INFO] [stdout] 623 | |         });
[INFO] [stdout]     | |__________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 619 |         let _ = &NEG[1..(NEG.len() - 1)].iter().for_each(|set| {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libm` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "35c7202b9990ad4458aa7eebc718c1ab2e7c7ce7a982084203c555faa6ae45dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35c7202b9990ad4458aa7eebc718c1ab2e7c7ce7a982084203c555faa6ae45dd", kill_on_drop: false }`
[INFO] [stdout] 35c7202b9990ad4458aa7eebc718c1ab2e7c7ce7a982084203c555faa6ae45dd