[INFO] cloning repository https://github.com/coeuvre/rust-2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/coeuvre/rust-2048" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoeuvre%2Frust-2048", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoeuvre%2Frust-2048'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9318fefff673888ce11098a37f7c95dd7dbbbfda
[INFO] checking coeuvre/rust-2048 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoeuvre%2Frust-2048" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/coeuvre/rust-2048 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/coeuvre/rust-2048
[INFO] finished tweaking git repo https://github.com/coeuvre/rust-2048
[INFO] tweaked toml for git repo https://github.com/coeuvre/rust-2048 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/coeuvre/rust-2048 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] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded piston-shaders_graphics2d v0.1.0
[INFO] [stderr]   Downloaded piston2d-graphics v0.19.0
[INFO] [stderr]   Downloaded piston-gfx_texture v0.20.0
[INFO] [stderr]   Downloaded gfx v0.13.0
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.35.0
[INFO] [stderr]   Downloaded png v0.6.2
[INFO] [stderr]   Downloaded pistoncore-event_loop v0.27.0
[INFO] [stderr]   Downloaded gfx_device_gl v0.12.0
[INFO] [stderr]   Downloaded image v0.12.4
[INFO] [stderr]   Downloaded piston v0.27.0
[INFO] [stderr]   Downloaded piston2d-opengl_graphics v0.37.0
[INFO] [stderr]   Downloaded piston_window v0.61.0
[INFO] [stderr]   Downloaded gfx_core v0.5.1
[INFO] [stderr]   Downloaded sdl2 v0.27.3
[INFO] [stderr]   Downloaded pistoncore-glutin_window v0.33.0
[INFO] [stderr]   Downloaded pistoncore-input v0.15.0
[INFO] [stderr]   Downloaded pistoncore-window v0.24.0
[INFO] [stderr]   Downloaded sdl2-sys v0.27.3
[INFO] [stderr]   Downloaded pistoncore-sdl2_window v0.38.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] c2e1259a74acf9f710767ea09f428394cc5fc591868937f9e83e1b0af5fffef3
[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" "c2e1259a74acf9f710767ea09f428394cc5fc591868937f9e83e1b0af5fffef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2e1259a74acf9f710767ea09f428394cc5fc591868937f9e83e1b0af5fffef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2e1259a74acf9f710767ea09f428394cc5fc591868937f9e83e1b0af5fffef3", kill_on_drop: false }`
[INFO] [stdout] c2e1259a74acf9f710767ea09f428394cc5fc591868937f9e83e1b0af5fffef3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] b7df8a9f6bc8c1c1ddd6ef2d5cd423b4c19a202961a20e43e68cba2855e7c00e
[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" "b7df8a9f6bc8c1c1ddd6ef2d5cd423b4c19a202961a20e43e68cba2855e7c00e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling khronos_api v1.0.1
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]     Checking shader_version v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking piston-texture v0.5.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking interpolation v0.1.0
[INFO] [stderr]     Checking read_color v0.1.0
[INFO] [stderr]    Compiling sdl2-sys v0.27.3
[INFO] [stderr]     Checking piston-shaders_graphics2d v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling rayon v1.4.1
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking pistoncore-input v0.15.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]    Compiling xml-rs v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking piston2d-graphics v0.19.0
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking fs2 v0.2.5
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking memmap v0.4.0
[INFO] [stderr]     Checking gfx_core v0.5.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking stb_truetype v0.2.8
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling wayland-scanner v0.7.8
[INFO] [stderr]     Checking pistoncore-window v0.24.0
[INFO] [stderr]    Compiling gl_generator v0.5.5
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking rayon-core v1.8.1
[INFO] [stderr]     Checking pistoncore-event_loop v0.27.0
[INFO] [stderr]     Checking rusttype v0.2.4
[INFO] [stderr]    Compiling gl_generator v0.6.1
[INFO] [stderr]     Checking piston v0.27.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling wayland-client v0.7.8
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]    Compiling glutin v0.7.4
[INFO] [stderr]    Compiling gfx_gl v0.3.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking sdl2 v0.27.3
[INFO] [stderr]    Compiling gl v0.6.5
[INFO] [stderr]    Compiling target_build_utils v0.3.1
[INFO] [stderr]     Checking gfx v0.13.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking image v0.12.4
[INFO] [stderr]     Checking gfx_device_gl v0.12.0
[INFO] [stderr]     Checking pistoncore-sdl2_window v0.38.0
[INFO] [stderr]     Checking piston-gfx_texture v0.20.0
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.37.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.35.0
[INFO] [stderr]    Compiling libloading v0.3.4
[INFO] [stderr]     Checking dlib v0.3.1
[INFO] [stderr]     Checking wayland-sys v0.7.8
[INFO] [stderr]     Checking wayland-window v0.4.4
[INFO] [stderr]     Checking wayland-kbd v0.6.3
[INFO] [stderr]     Checking winit v0.5.11
[INFO] [stderr]     Checking pistoncore-glutin_window v0.33.0
[INFO] [stderr]     Checking piston_window v0.61.0
[INFO] [stderr]     Checking rust-2048 v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Key` is imported redundantly
[INFO] [stdout]    --> src/app.rs:108:7
[INFO] [stdout]     |
[INFO] [stdout] 3   | use piston_window::*;
[INFO] [stdout]     |     ---------------- the item `Key` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 108 |         use piston_window::Key;        
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Encodable`
[INFO] [stdout]  --> src/settings.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rustc_serialize::{ json, Encodable, Decodable };
[INFO] [stdout]   |                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Key` is imported redundantly
[INFO] [stdout]    --> src/app.rs:108:7
[INFO] [stdout]     |
[INFO] [stdout] 3   | use piston_window::*;
[INFO] [stdout]     |     ---------------- the item `Key` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 108 |         use piston_window::Key;        
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Encodable`
[INFO] [stdout]  --> src/settings.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rustc_serialize::{ json, Encodable, Decodable };
[INFO] [stdout]   |                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 45s
[INFO] running `Command { std: "docker" "inspect" "b7df8a9f6bc8c1c1ddd6ef2d5cd423b4c19a202961a20e43e68cba2855e7c00e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7df8a9f6bc8c1c1ddd6ef2d5cd423b4c19a202961a20e43e68cba2855e7c00e", kill_on_drop: false }`
[INFO] [stdout] b7df8a9f6bc8c1c1ddd6ef2d5cd423b4c19a202961a20e43e68cba2855e7c00e