[INFO] updating cached repository https://github.com/pixlark/rust-2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c4cad366c974d5471e6db2a1b727b8c9133b342
[INFO] testing pixlark/rust-2048 against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixlark%2Frust-2048" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  91% (41/45)   
Checking out files:  93% (42/45)   
Checking out files:  95% (43/45)   
Checking out files:  97% (44/45)   
Checking out files: 100% (45/45)   
Checking out files: 100% (45/45), done.
[INFO] validating manifest of git repo https://github.com/pixlark/rust-2048 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pixlark/rust-2048
[INFO] finished tweaking git repo https://github.com/pixlark/rust-2048
[INFO] tweaked toml for git repo https://github.com/pixlark/rust-2048 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/pixlark/rust-2048 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1598dcce5938ca73992bff83f4cfa19bb2129cdfdf9cfeca26def5842e0cb4a
[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" "f1598dcce5938ca73992bff83f4cfa19bb2129cdfdf9cfeca26def5842e0cb4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1598dcce5938ca73992bff83f4cfa19bb2129cdfdf9cfeca26def5842e0cb4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1598dcce5938ca73992bff83f4cfa19bb2129cdfdf9cfeca26def5842e0cb4a", kill_on_drop: false }`
[INFO] [stdout] f1598dcce5938ca73992bff83f4cfa19bb2129cdfdf9cfeca26def5842e0cb4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a2cad623a1f182f245644bc37eda18cb76ac1bd97d8a5a4bc827f901157df9a6
[INFO] running `Command { std: "docker" "start" "-a" "a2cad623a1f182f245644bc37eda18cb76ac1bd97d8a5a4bc827f901157df9a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling game-2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stdout] warning: unused import: `sdl2::video::WindowContext`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use sdl2::video::WindowContext;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `v2` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct v2 {
[INFO] [stdout]    |        ^^ help: convert the identifier to upper camel case (notice the capitalization): `V2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'rand::Rng::choose': use SliceRandom::choose instead
[INFO] [stdout]    --> src/main.rs:267:32
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let choice: u64 = *rng.choose(&[2, 4]).unwrap();
[INFO] [stdout]     |                                ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `state_stack`
[INFO] [stdout]    --> src/main.rs:321:9
[INFO] [stdout]     |
[INFO] [stdout] 321 |     let mut state_stack: Vec<Box<dyn GameState>> = Vec::new();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_state_stack`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:321:9
[INFO] [stdout]     |
[INFO] [stdout] 321 |     let mut state_stack: Vec<Box<dyn GameState>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_fitness`
[INFO] [stdout]    --> src/main.rs:270:8
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn get_fitness(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `PlayingState`
[INFO] [stdout]    --> src/main.rs:301:8
[INFO] [stdout]     |
[INFO] [stdout] 301 | struct PlayingState {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `color_map` should have an upper case name
[INFO] [stdout]   --> src/main.rs:27:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     static ref color_map: HashMap<u64, Color> = {
[INFO] [stdout]    |                ^^^^^^^^^ help: convert the identifier to upper case: `COLOR_MAP`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:159:21
[INFO] [stdout]     |
[INFO] [stdout] 159 | /                     canvas.copy(
[INFO] [stdout] 160 | |                         &texture,
[INFO] [stdout] 161 | |                         None,
[INFO] [stdout] 162 | |                         Some(Rect::new(
[INFO] [stdout] ...   |
[INFO] [stdout] 167 | |                         )),
[INFO] [stdout] 168 | |                     );
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.game_2048.3ancfubp-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc" "/opt/rustwide/target/debug/deps/game_2048-87d458f8304c82dc.51347hbbar09m6xj.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblazy_static-0c44697ac28cf26a.rlib" "/opt/rustwide/target/debug/deps/libsdl2-1e6fec43fa001d80.rlib" "/opt/rustwide/target/debug/deps/librand-9b0376e8da69ffc3.rlib" "/opt/rustwide/target/debug/deps/librand-3a4fee3d5d55f5d4.rlib" "/opt/rustwide/target/debug/deps/libsdl2_sys-8b2227f60bafda84.rlib" "/opt/rustwide/target/debug/deps/libbitflags-12fb577444bcad11.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-cbf4e74d25b393ff.rlib" "/opt/rustwide/target/debug/deps/libnum-7776c808f3981920.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-0072aa6ed468b655.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-ee535da76a16751b.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-0e331abae535600b.rlib" "/opt/rustwide/target/debug/deps/librand-ea5047b5d9427051.rlib" "/opt/rustwide/target/debug/deps/liblibc-5839fb669631501b.rlib" "/opt/rustwide/target/debug/deps/librand_xorshift-47416f109dac9f3e.rlib" "/opt/rustwide/target/debug/deps/librand_pcg-df22a298f3b50d43.rlib" "/opt/rustwide/target/debug/deps/librand_hc-244c88fbf4e63396.rlib" "/opt/rustwide/target/debug/deps/librand_chacha-8142db218b78c3fc.rlib" "/opt/rustwide/target/debug/deps/librand_isaac-dfa767815a8a3cbf.rlib" "/opt/rustwide/target/debug/deps/librand_core-b7089351777b095b.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-8bb11f807a7b6b4c.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-ca8087507780d964.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-259c92b387c1c166.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-16e0a2fbbb8e14b3.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-8a1651b8e23d2aaf.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-23bdd98b0574083e.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-855a92055ec33e2e.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-24c70dd44fbacdfb.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-b326273841bae587.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-ac3c1f0e16507051.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-a5729542b65954aa.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-09bd1119ab1cad7d.rlib" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9a787681bfbeaf61.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.45.2-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-5a0398ee67f74664.rlib" "-Wl,-Bdynamic" "-lSDL2_ttf" "-lSDL2" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lSDL2_ttf
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `game-2048`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a2cad623a1f182f245644bc37eda18cb76ac1bd97d8a5a4bc827f901157df9a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2cad623a1f182f245644bc37eda18cb76ac1bd97d8a5a4bc827f901157df9a6", kill_on_drop: false }`
[INFO] [stdout] a2cad623a1f182f245644bc37eda18cb76ac1bd97d8a5a4bc827f901157df9a6