[INFO] fetching crate libm 0.2.1...
[INFO] testing libm-0.2.1 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate libm 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate libm 0.2.1 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12617caed89636d329b8076be3e83fa58ddf1cf143d3e73fa5d16b99a6cc008a
[INFO] running `Command { std: "docker" "start" "-a" "12617caed89636d329b8076be3e83fa58ddf1cf143d3e73fa5d16b99a6cc008a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12617caed89636d329b8076be3e83fa58ddf1cf143d3e73fa5d16b99a6cc008a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12617caed89636d329b8076be3e83fa58ddf1cf143d3e73fa5d16b99a6cc008a", kill_on_drop: false }`
[INFO] [stdout] 12617caed89636d329b8076be3e83fa58ddf1cf143d3e73fa5d16b99a6cc008a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5e32abfe91d8e5115203f5719fb46b952195860118459c0d9df6590ab15eff4
[INFO] running `Command { std: "docker" "start" "-a" "f5e32abfe91d8e5115203f5719fb46b952195860118459c0d9df6590ab15eff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "f5e32abfe91d8e5115203f5719fb46b952195860118459c0d9df6590ab15eff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e32abfe91d8e5115203f5719fb46b952195860118459c0d9df6590ab15eff4", kill_on_drop: false }`
[INFO] [stdout] f5e32abfe91d8e5115203f5719fb46b952195860118459c0d9df6590ab15eff4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebe842fe44352fb6482c80f86da5b21edd80f4a0a538614ffe5035a59cd40fd6
[INFO] running `Command { std: "docker" "start" "-a" "ebe842fe44352fb6482c80f86da5b21edd80f4a0a538614ffe5035a59cd40fd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[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]     | |______________^
[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] 
[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]     | |__________^
[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" "ebe842fe44352fb6482c80f86da5b21edd80f4a0a538614ffe5035a59cd40fd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebe842fe44352fb6482c80f86da5b21edd80f4a0a538614ffe5035a59cd40fd6", kill_on_drop: false }`
[INFO] [stdout] ebe842fe44352fb6482c80f86da5b21edd80f4a0a538614ffe5035a59cd40fd6