[INFO] updating cached repository https://github.com/ShadowMitia/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] 0e38f7cea710dd21d117bf4f5d9286ec502b7692
[INFO] testing ShadowMitia/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%2FShadowMitia%2Frust-2048" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShadowMitia/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/ShadowMitia/rust-2048
[INFO] finished tweaking git repo https://github.com/ShadowMitia/rust-2048
[INFO] tweaked toml for git repo https://github.com/ShadowMitia/rust-2048 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ShadowMitia/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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9597d60bf75d862ca03b9de15441b0399c419b3903b4ed0fd1627a0c242f24ec
[INFO] running `Command { std: "docker" "start" "-a" "9597d60bf75d862ca03b9de15441b0399c419b3903b4ed0fd1627a0c242f24ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9597d60bf75d862ca03b9de15441b0399c419b3903b4ed0fd1627a0c242f24ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9597d60bf75d862ca03b9de15441b0399c419b3903b4ed0fd1627a0c242f24ec", kill_on_drop: false }`
[INFO] [stdout] 9597d60bf75d862ca03b9de15441b0399c419b3903b4ed0fd1627a0c242f24ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 81c4c715df16b82c256759bd05f42fcbd6e9fd43d4bca9cc9f0a223a2233520b
[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" "81c4c715df16b82c256759bd05f42fcbd6e9fd43d4bca9cc9f0a223a2233520b", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling sdl2 v0.34.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling sdl2-sys v0.34.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling game-2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `game_running`
[INFO] [stdout]    --> src/main.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |     let mut game_running = true;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_running`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/main.rs:311:25
[INFO] [stdout]     |
[INFO] [stdout] 311 |                     let res = add_to_empty_cell(&mut rng, &mut grid, val);
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/main.rs:321:25
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     let res = add_to_empty_cell(&mut rng, &mut grid, val);
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/main.rs:330:25
[INFO] [stdout]     |
[INFO] [stdout] 330 |                     let res = add_to_empty_cell(&mut rng, &mut grid, val);
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |     let mut game_running = true;
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:290:13
[INFO] [stdout]     |
[INFO] [stdout] 290 |         let mut moved = false;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[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_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.game_2048.27llkvr4-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590" "/opt/rustwide/target/debug/deps/game_2048-9dbd69223a77c590.2056edl0l1fe32g3.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/librand-90f20c4e6b10abb2.rlib" "/opt/rustwide/target/debug/deps/librand_chacha-de1fe011be741085.rlib" "/opt/rustwide/target/debug/deps/libppv_lite86-c44318ca2ca571e9.rlib" "/opt/rustwide/target/debug/deps/librand_core-abd2f358ea987bfa.rlib" "/opt/rustwide/target/debug/deps/libgetrandom-f5b9cbe1d1bd7ba8.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-ab1bd98be96b57b3.rlib" "/opt/rustwide/target/debug/deps/libsdl2-f84485a7e8531ee1.rlib" "/opt/rustwide/target/debug/deps/libsdl2_sys-9add9fb75c7941ed.rlib" "/opt/rustwide/target/debug/deps/libbitflags-02fffe573fe5be1a.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-660ab907323d6aba.rlib" "/opt/rustwide/target/debug/deps/liblibc-7395dad9984dcf6a.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" "-lSDL2_ttf" "-lutil" "-ldl" "-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; 6 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" "81c4c715df16b82c256759bd05f42fcbd6e9fd43d4bca9cc9f0a223a2233520b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c4c715df16b82c256759bd05f42fcbd6e9fd43d4bca9cc9f0a223a2233520b", kill_on_drop: false }`
[INFO] [stdout] 81c4c715df16b82c256759bd05f42fcbd6e9fd43d4bca9cc9f0a223a2233520b