[INFO] cloning repository https://github.com/exacs/rust_four
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/exacs/rust_four" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexacs%2Frust_four", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexacs%2Frust_four'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2799114ba72aa052aff634c068243a9b5c78b36
[INFO] checking exacs/rust_four against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexacs%2Frust_four" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/exacs/rust_four on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/exacs/rust_four
[INFO] finished tweaking git repo https://github.com/exacs/rust_four
[INFO] tweaked toml for git repo https://github.com/exacs/rust_four written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/exacs/rust_four already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e5307827483aaf90ea959f0f89179782c0899baf8455bdba13381d1dea46bd0
[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" "7e5307827483aaf90ea959f0f89179782c0899baf8455bdba13381d1dea46bd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e5307827483aaf90ea959f0f89179782c0899baf8455bdba13381d1dea46bd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e5307827483aaf90ea959f0f89179782c0899baf8455bdba13381d1dea46bd0", kill_on_drop: false }`
[INFO] [stdout] 7e5307827483aaf90ea959f0f89179782c0899baf8455bdba13381d1dea46bd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 298217c5a61dbd723b51e50a5c1c56741f9c7e7b3e1f120f1727aaaea3f5c0b8
[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" "298217c5a61dbd723b51e50a5c1c56741f9c7e7b3e1f120f1727aaaea3f5c0b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking rust_four v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/game.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 |     black_player: &'a Player,
[INFO] [stdout]   |                       ^^^^^^ help: use `dyn`: `dyn Player`
[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/game.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     white_player: &'a Player,
[INFO] [stdout]    |                       ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:28:27
[INFO] [stdout]    |
[INFO] [stdout] 28 |         black_player: &'a Player,
[INFO] [stdout]    |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         white_player: &'a Player,
[INFO] [stdout]    |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/players/smart_player.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 |     dumb_player: Box<Player>,
[INFO] [stdout]   |                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/players/smart_player.rs:93:33
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn new(dumb_player: Box<Player>) -> SmartPlayer {
[INFO] [stdout]    |                                 ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/game.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 |     black_player: &'a Player,
[INFO] [stdout]   |                       ^^^^^^ help: use `dyn`: `dyn Player`
[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/game.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     white_player: &'a Player,
[INFO] [stdout]    |                       ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:28:27
[INFO] [stdout]    |
[INFO] [stdout] 28 |         black_player: &'a Player,
[INFO] [stdout]    |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         white_player: &'a Player,
[INFO] [stdout]    |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/players/smart_player.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 |     dumb_player: Box<Player>,
[INFO] [stdout]   |                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/players/smart_player.rs:93:33
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn new(dumb_player: Box<Player>) -> SmartPlayer {
[INFO] [stdout]    |                                 ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/database.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => panic!(kind),
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => panic!("{}", kind),
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => std::panic::panic_any(kind),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/database.rs:43:32
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => panic!(kind),
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => panic!("{}", kind),
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 kind => std::panic::panic_any(kind),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.36s
[INFO] running `Command { std: "docker" "inspect" "298217c5a61dbd723b51e50a5c1c56741f9c7e7b3e1f120f1727aaaea3f5c0b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298217c5a61dbd723b51e50a5c1c56741f9c7e7b3e1f120f1727aaaea3f5c0b8", kill_on_drop: false }`
[INFO] [stdout] 298217c5a61dbd723b51e50a5c1c56741f9c7e7b3e1f120f1727aaaea3f5c0b8