[INFO] cloning repository https://github.com/HiruNya/example_vn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HiruNya/example_vn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHiruNya%2Fexample_vn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHiruNya%2Fexample_vn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a7dbf85181f11f6d2500ea946b483d3b534bb64
[INFO] testing HiruNya/example_vn against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHiruNya%2Fexample_vn" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HiruNya/example_vn on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HiruNya/example_vn
[INFO] finished tweaking git repo https://github.com/HiruNya/example_vn
[INFO] tweaked toml for git repo https://github.com/HiruNya/example_vn written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/HiruNya/example_vn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/HiruNya/gobu`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v0.4.4
[INFO] [stderr]   Downloaded vecmath v0.3.1
[INFO] [stderr]   Downloaded pistoncore-glutin_window v0.47.0
[INFO] [stderr]   Downloaded piston-texture v0.6.0
[INFO] [stderr]   Downloaded inflate v0.4.2
[INFO] [stderr]   Downloaded num-derive v0.2.2
[INFO] [stderr]   Downloaded gif v0.10.0
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.51.0
[INFO] [stderr]   Downloaded derivative v1.0.0
[INFO] [stderr]   Downloaded thread_local v0.3.5
[INFO] [stderr]   Downloaded nom v4.0.0
[INFO] [stderr]   Downloaded itertools v0.5.10
[INFO] [stderr]   Downloaded pistoncore-window v0.32.0
[INFO] [stderr]   Downloaded interpolation v0.1.0
[INFO] [stderr]   Downloaded claxon v0.3.1
[INFO] [stderr]   Downloaded shader_version v0.3.0
[INFO] [stderr]   Downloaded backtrace-sys v0.1.23
[INFO] [stderr]   Downloaded rayon v1.0.1
[INFO] [stderr]   Downloaded pistoncore-input v0.21.0
[INFO] [stderr]   Downloaded rayon-core v1.4.0
[INFO] [stderr]   Downloaded x11-dl v2.17.5
[INFO] [stderr]   Downloaded syn v0.14.1
[INFO] [stderr]   Downloaded aho-corasick v0.6.4
[INFO] [stderr]   Downloaded lewton v0.5.2
[INFO] [stderr]   Downloaded pistoncore-event_loop v0.37.0
[INFO] [stderr]   Downloaded piston v0.37.0
[INFO] [stderr]   Downloaded ogg v0.4.1
[INFO] [stderr]   Downloaded toml v0.4.6
[INFO] [stderr]   Downloaded gfx_core v0.8.2
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.14
[INFO] [stderr]   Downloaded piston-gfx_texture v0.32.0
[INFO] [stderr]   Downloaded ordered-float v0.5.0
[INFO] [stderr]   Downloaded piston2d-graphics v0.26.0
[INFO] [stderr]   Downloaded serde v1.0.65
[INFO] [stderr]   Downloaded stb_truetype v0.2.2
[INFO] [stderr]   Downloaded rusttype v0.4.3
[INFO] [stderr]   Downloaded rusttype v0.6.1
[INFO] [stderr]   Downloaded winit v0.12.0
[INFO] [stderr]   Downloaded glutin v0.14.0
[INFO] [stderr]   Downloaded approx v0.2.0
[INFO] [stderr]   Downloaded coord v0.11.0
[INFO] [stderr]   Downloaded gfx_glyph v0.12.0
[INFO] [stderr]   Downloaded slice-deque v0.1.9
[INFO] [stderr]   Downloaded cpal v0.8.1
[INFO] [stderr]   Downloaded mach v0.2.0
[INFO] [stderr]   Downloaded serde_derive v1.0.65
[INFO] [stderr]   Downloaded rodio v0.8.0
[INFO] [stderr]   Downloaded piston_window v0.80.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f117b4d14d468b2f7dcdcfd8b6511987da32535259a66842159dba65e9dde2be
[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" "f117b4d14d468b2f7dcdcfd8b6511987da32535259a66842159dba65e9dde2be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f117b4d14d468b2f7dcdcfd8b6511987da32535259a66842159dba65e9dde2be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f117b4d14d468b2f7dcdcfd8b6511987da32535259a66842159dba65e9dde2be", kill_on_drop: false }`
[INFO] [stdout] f117b4d14d468b2f7dcdcfd8b6511987da32535259a66842159dba65e9dde2be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 082f5ba072e4b3726bc4516725add8e498cbfdb53514da502b85c95a67f24f65
[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" "082f5ba072e4b3726bc4516725add8e498cbfdb53514da502b85c95a67f24f65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling serde v1.0.65
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling token_store v0.1.2
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling adler32 v1.0.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling shader_version v0.3.0
[INFO] [stderr]    Compiling color_quant v1.0.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling piston-texture v0.6.0
[INFO] [stderr]    Compiling interpolation v0.1.0
[INFO] [stderr]    Compiling read_color v1.0.0
[INFO] [stderr]    Compiling piston-shaders_graphics2d v0.3.1
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling linked-hash-map v0.5.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling seahash v3.0.5
[INFO] [stderr]    Compiling claxon v0.3.1
[INFO] [stderr]    Compiling xi-unicode v0.1.0
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.4
[INFO] [stderr]    Compiling piston-viewport v0.3.0
[INFO] [stderr]    Compiling vecmath v0.3.1
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling inflate v0.4.2
[INFO] [stderr]    Compiling stb_truetype v0.2.2
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling ogg v0.4.1
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]    Compiling gif v0.10.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling slice-deque v0.1.9
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling x11-dl v2.17.5
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling lewton v0.5.2
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling nom v4.0.0
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.14.1
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling minimp3-sys v0.3.0
[INFO] [stderr]    Compiling tempfile v3.0.2
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling cpal v0.8.1
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling approx v0.2.0
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling cgmath v0.14.1
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling rusttype v0.6.1
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling minimp3 v0.3.0
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]    Compiling glutin v0.14.0
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling rodio v0.8.0
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.65
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling winit v0.12.0
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_device_gl v0.15.3
[INFO] [stderr]    Compiling piston-gfx_texture v0.32.0
[INFO] [stderr]    Compiling gfx_glyph v0.12.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.51.0
[INFO] [stderr]    Compiling pistoncore-input v0.21.0
[INFO] [stderr]    Compiling coord v0.11.0
[INFO] [stderr]    Compiling pistoncore-window v0.32.0
[INFO] [stderr]    Compiling pistoncore-event_loop v0.37.0
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.47.0
[INFO] [stderr]    Compiling piston v0.37.0
[INFO] [stderr]    Compiling piston_window v0.80.0
[INFO] [stderr]    Compiling gobu v0.2.0 (https://github.com/HiruNya/gobu#0ccf7902)
[INFO] [stderr]    Compiling example_vn v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 &game.draw(c, g);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let _ = &game.draw(c, g);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 54s
[INFO] running `Command { std: "docker" "inspect" "082f5ba072e4b3726bc4516725add8e498cbfdb53514da502b85c95a67f24f65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "082f5ba072e4b3726bc4516725add8e498cbfdb53514da502b85c95a67f24f65", kill_on_drop: false }`
[INFO] [stdout] 082f5ba072e4b3726bc4516725add8e498cbfdb53514da502b85c95a67f24f65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a3b1a9131f522a9e3476a0ccce965fb3b64889b3e2a1fe36c40ccce5cdd5588
[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" "3a3b1a9131f522a9e3476a0ccce965fb3b64889b3e2a1fe36c40ccce5cdd5588", kill_on_drop: false }`
[INFO] [stderr]    Compiling example_vn v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 &game.draw(c, g);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let _ = &game.draw(c, g);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "3a3b1a9131f522a9e3476a0ccce965fb3b64889b3e2a1fe36c40ccce5cdd5588", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3b1a9131f522a9e3476a0ccce965fb3b64889b3e2a1fe36c40ccce5cdd5588", kill_on_drop: false }`
[INFO] [stdout] 3a3b1a9131f522a9e3476a0ccce965fb3b64889b3e2a1fe36c40ccce5cdd5588
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 44fd5da3c776882819f2c5f9834899c4573476f716af8c210bfaa2102eb043e8
[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" "44fd5da3c776882819f2c5f9834899c4573476f716af8c210bfaa2102eb043e8", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/main.rs:53:17
[INFO] [stderr]    |
[INFO] [stderr] 53 |                 &game.draw(c, g);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 53 |                 let _ = &game.draw(c, g);
[INFO] [stderr]    |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `example_vn` (bin "example_vn" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/example_vn-dd950a77f3161240)
[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" "44fd5da3c776882819f2c5f9834899c4573476f716af8c210bfaa2102eb043e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44fd5da3c776882819f2c5f9834899c4573476f716af8c210bfaa2102eb043e8", kill_on_drop: false }`
[INFO] [stdout] 44fd5da3c776882819f2c5f9834899c4573476f716af8c210bfaa2102eb043e8