[INFO] crate coin-tosser 0.1.2 is already in cache
[INFO] testing coin-tosser-0.1.2 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate coin-tosser 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate coin-tosser 0.1.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coin-tosser 0.1.2
[INFO] finished tweaking crates.io crate coin-tosser 0.1.2
[INFO] tweaked toml for crates.io crate coin-tosser 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate coin-tosser 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e92a959286823a7ebd5688064b8e71c7081827ed7d0abc07b731f7f592994453
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e92a959286823a7ebd5688064b8e71c7081827ed7d0abc07b731f7f592994453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e92a959286823a7ebd5688064b8e71c7081827ed7d0abc07b731f7f592994453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e92a959286823a7ebd5688064b8e71c7081827ed7d0abc07b731f7f592994453", kill_on_drop: false }`
[INFO] [stdout] e92a959286823a7ebd5688064b8e71c7081827ed7d0abc07b731f7f592994453
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff49d17022e6598172e2026d4853c255143514f6d5d5029079d26bedaf2a5d07
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff49d17022e6598172e2026d4853c255143514f6d5d5029079d26bedaf2a5d07", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.11
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling cargo-readme v3.1.2
[INFO] [stderr]    Compiling coin-tosser v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/main.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |   for x in 0..number_of_rounds {
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |       for x in 0..how_many_tosses {
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.07s
[INFO] running `Command { std: "docker" "inspect" "ff49d17022e6598172e2026d4853c255143514f6d5d5029079d26bedaf2a5d07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff49d17022e6598172e2026d4853c255143514f6d5d5029079d26bedaf2a5d07", kill_on_drop: false }`
[INFO] [stdout] ff49d17022e6598172e2026d4853c255143514f6d5d5029079d26bedaf2a5d07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e4af1d87d64eb4d2ca8553a031891b716ac3aa764ff016e283d0754051d992c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1e4af1d87d64eb4d2ca8553a031891b716ac3aa764ff016e283d0754051d992c", kill_on_drop: false }`
[INFO] [stderr]    Compiling coin-tosser v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/main.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |   for x in 0..number_of_rounds {
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |       for x in 0..how_many_tosses {
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1e4af1d87d64eb4d2ca8553a031891b716ac3aa764ff016e283d0754051d992c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e4af1d87d64eb4d2ca8553a031891b716ac3aa764ff016e283d0754051d992c", kill_on_drop: false }`
[INFO] [stdout] 1e4af1d87d64eb4d2ca8553a031891b716ac3aa764ff016e283d0754051d992c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 52ba0ef814b7febaf896f66b81e89bff88bfb35433f533378de859b79199814c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "52ba0ef814b7febaf896f66b81e89bff88bfb35433f533378de859b79199814c", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:9:7
[INFO] [stderr]   |
[INFO] [stderr] 9 |   for x in 0..number_of_rounds {
[INFO] [stderr]   |       ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:19:11
[INFO] [stderr]    |
[INFO] [stderr] 19 |       for x in 0..how_many_tosses {
[INFO] [stderr]    |           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/coin_tosser-5bd98e622e5ed2b3
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "52ba0ef814b7febaf896f66b81e89bff88bfb35433f533378de859b79199814c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52ba0ef814b7febaf896f66b81e89bff88bfb35433f533378de859b79199814c", kill_on_drop: false }`
[INFO] [stdout] 52ba0ef814b7febaf896f66b81e89bff88bfb35433f533378de859b79199814c