[INFO] cloning repository https://github.com/robert-wallis/rust-guessing-game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robert-wallis/rust-guessing-game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-wallis%2Frust-guessing-game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-wallis%2Frust-guessing-game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b4c65f9decaae81d8101f3a6b27711c88907ded
[INFO] checking robert-wallis/rust-guessing-game against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-wallis%2Frust-guessing-game" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robert-wallis/rust-guessing-game on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/robert-wallis/rust-guessing-game
[INFO] finished tweaking git repo https://github.com/robert-wallis/rust-guessing-game
[INFO] tweaked toml for git repo https://github.com/robert-wallis/rust-guessing-game written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/robert-wallis/rust-guessing-game already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c32edc83bb3097f6029f614c8433ca16812da11342c7626dc4fe1e0960f280bf
[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" "c32edc83bb3097f6029f614c8433ca16812da11342c7626dc4fe1e0960f280bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c32edc83bb3097f6029f614c8433ca16812da11342c7626dc4fe1e0960f280bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c32edc83bb3097f6029f614c8433ca16812da11342c7626dc4fe1e0960f280bf", kill_on_drop: false }`
[INFO] [stdout] c32edc83bb3097f6029f614c8433ca16812da11342c7626dc4fe1e0960f280bf
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fe213e082914f9c213fb071fbfff8ad715f49d19a008ad1257dd9852ceb11f7
[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" "5fe213e082914f9c213fb071fbfff8ad715f49d19a008ad1257dd9852ceb11f7", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:59:43
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn test_guesser(name: &str, guesser: &mut Guesser) {
[INFO] [stdout]    |                                           ^^^^^^^ help: use `dyn`: `dyn Guesser`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:93:19
[INFO] [stdout]    |
[INFO] [stdout] 93 |     guesser: &mut Guesser,
[INFO] [stdout]    |                   ^^^^^^^ help: use `dyn`: `dyn Guesser`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:94:21
[INFO] [stdout]    |
[INFO] [stdout] 94 |     displayer: &mut Displayer,
[INFO] [stdout]    |                     ^^^^^^^^^ help: use `dyn`: `dyn Displayer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:95:18
[INFO] [stdout]    |
[INFO] [stdout] 95 |     random: &mut RandomGenerator,
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RandomGenerator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:59:43
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn test_guesser(name: &str, guesser: &mut Guesser) {
[INFO] [stdout]    |                                           ^^^^^^^ help: use `dyn`: `dyn Guesser`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:93:19
[INFO] [stdout]    |
[INFO] [stdout] 93 |     guesser: &mut Guesser,
[INFO] [stdout]    |                   ^^^^^^^ help: use `dyn`: `dyn Guesser`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:94:21
[INFO] [stdout]    |
[INFO] [stdout] 94 |     displayer: &mut Displayer,
[INFO] [stdout]    |                     ^^^^^^^^^ help: use `dyn`: `dyn Displayer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:95:18
[INFO] [stdout]    |
[INFO] [stdout] 95 |     random: &mut RandomGenerator,
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RandomGenerator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.56s
[INFO] running `Command { std: "docker" "inspect" "5fe213e082914f9c213fb071fbfff8ad715f49d19a008ad1257dd9852ceb11f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe213e082914f9c213fb071fbfff8ad715f49d19a008ad1257dd9852ceb11f7", kill_on_drop: false }`
[INFO] [stdout] 5fe213e082914f9c213fb071fbfff8ad715f49d19a008ad1257dd9852ceb11f7