[INFO] cloning repository https://github.com/tomc1998/specs_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomc1998/specs_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Fspecs_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Fspecs_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c82dd36d319a3f4e0bf57a787663baa067001c5
[INFO] testing tomc1998/specs_test against try#613d1972a772987ed4ee06faccbab0e2fc839871+rustflags=-Copt-level=3 for pr-107051
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Fspecs_test" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomc1998/specs_test on toolchain 613d1972a772987ed4ee06faccbab0e2fc839871
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+613d1972a772987ed4ee06faccbab0e2fc839871" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomc1998/specs_test
[INFO] finished tweaking git repo https://github.com/tomc1998/specs_test
[INFO] tweaked toml for git repo https://github.com/tomc1998/specs_test written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tomc1998/specs_test 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" "+613d1972a772987ed4ee06faccbab0e2fc839871" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+613d1972a772987ed4ee06faccbab0e2fc839871" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c243669d0eaadbc4d71e984ae43aeafdcc384ce0ed7e88a57bb9c5c41913f36f
[INFO] running `Command { std: "docker" "start" "-a" "c243669d0eaadbc4d71e984ae43aeafdcc384ce0ed7e88a57bb9c5c41913f36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c243669d0eaadbc4d71e984ae43aeafdcc384ce0ed7e88a57bb9c5c41913f36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c243669d0eaadbc4d71e984ae43aeafdcc384ce0ed7e88a57bb9c5c41913f36f", kill_on_drop: false }`
[INFO] [stdout] c243669d0eaadbc4d71e984ae43aeafdcc384ce0ed7e88a57bb9c5c41913f36f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+613d1972a772987ed4ee06faccbab0e2fc839871" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ac46837c5177ba0707d5f8a4b27f2f4f78067697b817ee95b3083552c8f894b
[INFO] running `Command { std: "docker" "start" "-a" "2ac46837c5177ba0707d5f8a4b27f2f4f78067697b817ee95b3083552c8f894b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.22
[INFO] [stderr]    Compiling siphasher v0.2.2
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling dtoa v0.4.1
[INFO] [stderr]    Compiling itoa v0.3.1
[INFO] [stderr]    Compiling serde v0.9.15
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling log v0.3.7
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling phf v0.7.21
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling khronos_api v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling wayland-scanner v0.7.8
[INFO] [stderr]    Compiling gl_generator v0.5.2
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling tempfile v2.1.5
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling memmap v0.4.0
[INFO] [stderr]    Compiling x11-dl v2.13.0
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling target_build_utils v0.3.1
[INFO] [stderr]    Compiling byteorder v1.0.0
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling time v0.1.37
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling atom v0.3.4
[INFO] [stderr]    Compiling pulse v0.5.3
[INFO] [stderr]    Compiling num_cpus v1.4.0
[INFO] [stderr]    Compiling ticketed_lock v0.1.0
[INFO] [stderr]    Compiling smallvec v0.1.8
[INFO] [stderr]    Compiling tuple_utils v0.2.0
[INFO] [stderr]    Compiling wayland-client v0.7.8
[INFO] [stderr]    Compiling glutin v0.7.4
[INFO] [stderr]    Compiling glium v0.16.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling threadpool v1.3.2
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling mopa v0.2.2
[INFO] [stderr]    Compiling specs v0.8.1
[INFO] [stderr]    Compiling cgmath v0.14.1
[INFO] [stderr]    Compiling libloading v0.3.4
[INFO] [stderr]    Compiling dlib v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.7.8
[INFO] [stderr]    Compiling wayland-window v0.4.4
[INFO] [stderr]    Compiling wayland-kbd v0.6.3
[INFO] [stderr]    Compiling winit v0.5.11
[INFO] [stderr]    Compiling specs_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | use rand::{Rng, StdRng};
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stdout]    |           ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:7
[INFO] [stdout]    |
[INFO] [stdout] 52 |   let mut rng = StdRng::new().unwrap();
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 34s
[INFO] running `Command { std: "docker" "inspect" "2ac46837c5177ba0707d5f8a4b27f2f4f78067697b817ee95b3083552c8f894b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ac46837c5177ba0707d5f8a4b27f2f4f78067697b817ee95b3083552c8f894b", kill_on_drop: false }`
[INFO] [stdout] 2ac46837c5177ba0707d5f8a4b27f2f4f78067697b817ee95b3083552c8f894b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+613d1972a772987ed4ee06faccbab0e2fc839871" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f88460471a7b2a4a1eb0458a5bfa4380d928c794da8244590f2c8b3214eda583
[INFO] running `Command { std: "docker" "start" "-a" "f88460471a7b2a4a1eb0458a5bfa4380d928c794da8244590f2c8b3214eda583", kill_on_drop: false }`
[INFO] [stderr]    Compiling specs_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | use rand::{Rng, StdRng};
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stdout]    |           ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:7
[INFO] [stdout]    |
[INFO] [stdout] 52 |   let mut rng = StdRng::new().unwrap();
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "f88460471a7b2a4a1eb0458a5bfa4380d928c794da8244590f2c8b3214eda583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f88460471a7b2a4a1eb0458a5bfa4380d928c794da8244590f2c8b3214eda583", kill_on_drop: false }`
[INFO] [stdout] f88460471a7b2a4a1eb0458a5bfa4380d928c794da8244590f2c8b3214eda583
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+613d1972a772987ed4ee06faccbab0e2fc839871" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 64aa699d00c2279d55829419da6d71eb47496a56258ac5917f19bf0f0de2d815
[INFO] running `Command { std: "docker" "start" "-a" "64aa699d00c2279d55829419da6d71eb47496a56258ac5917f19bf0f0de2d815", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]   --> src/main.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::{Rng, StdRng};
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]   --> src/main.rs:52:11
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stderr]    |           ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:52:7
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stderr]    |       ----^^^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `specs_test` (bin "specs_test" test) generated 3 warnings (run `cargo fix --bin "specs_test" --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/specs_test-295b55812bb29023)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "64aa699d00c2279d55829419da6d71eb47496a56258ac5917f19bf0f0de2d815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64aa699d00c2279d55829419da6d71eb47496a56258ac5917f19bf0f0de2d815", kill_on_drop: false }`
[INFO] [stdout] 64aa699d00c2279d55829419da6d71eb47496a56258ac5917f19bf0f0de2d815