[INFO] cloning repository https://github.com/dstepanov/snake-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dstepanov/snake-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdstepanov%2Fsnake-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdstepanov%2Fsnake-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6260fec57e46fdf253478d3f203de3cd3cb809b
[INFO] testing dstepanov/snake-rs against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdstepanov%2Fsnake-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dstepanov/snake-rs on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dstepanov/snake-rs
[INFO] finished tweaking git repo https://github.com/dstepanov/snake-rs
[INFO] tweaked toml for git repo https://github.com/dstepanov/snake-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dstepanov/snake-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87a1b6d0a71f2a9f2e0d2fd2b94a112309b095dc9f583358a6d90cd1811b2ed7
[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" "87a1b6d0a71f2a9f2e0d2fd2b94a112309b095dc9f583358a6d90cd1811b2ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87a1b6d0a71f2a9f2e0d2fd2b94a112309b095dc9f583358a6d90cd1811b2ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87a1b6d0a71f2a9f2e0d2fd2b94a112309b095dc9f583358a6d90cd1811b2ed7", kill_on_drop: false }`
[INFO] [stdout] 87a1b6d0a71f2a9f2e0d2fd2b94a112309b095dc9f583358a6d90cd1811b2ed7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75ca1cf8cff7b292396dd53673334d931ea52b6d65064b94999db5ab6227dd85
[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" "75ca1cf8cff7b292396dd53673334d931ea52b6d65064b94999db5ab6227dd85", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling sdl2-sys v0.27.2
[INFO] [stderr]    Compiling num-integer v0.1.32
[INFO] [stderr]    Compiling num-iter v0.1.32
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling sdl2 v0.27.3
[INFO] [stderr]    Compiling snake-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let mut next = &mut match self.direction {
[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] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.snake_rs.7fgzl3dr-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732" "/opt/rustwide/target/debug/deps/snake_rs-631a8b83b9514732.8sb9zzedt61uk0x.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libsdl2-1901d9778e3a2149.rlib" "/opt/rustwide/target/debug/deps/librand-f9c9461fec8a743f.rlib" "/opt/rustwide/target/debug/deps/libsdl2_sys-cf9048c6454381f7.rlib" "/opt/rustwide/target/debug/deps/libbitflags-2660c594cf04f3b5.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-bb5cd3c8ae54f9d2.rlib" "/opt/rustwide/target/debug/deps/liblibc-9e6a882aa041f708.rlib" "/opt/rustwide/target/debug/deps/libnum-7a755afd8a87feab.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-64286157eefb1923.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-cb0479eda54dd52f.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-63f0f1ad7c20e381.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-e12de7683a34c500.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-446a53c2e468675f.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-86fef9fb252a2d33.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-3bed9bfd30304751.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-0e38eeb474a7b386.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-a846ed547b824740.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-c9540f0a4fb9265d.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-7d2ca66c92c356eb.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-147e2c808f949493.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-bd2a4369506670e9.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74bfdd0ce7d0ed48.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-6777f47f1c491841.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b104f1790174f2be.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-db37898996f45c13.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-25b7435131fc4938.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9d4b6f3c097e876e.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-3f953ad652ab829a.rlib" "-Wl,-Bdynamic" "-lSDL2_ttf" "-lSDL2" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
[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; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `snake-rs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "75ca1cf8cff7b292396dd53673334d931ea52b6d65064b94999db5ab6227dd85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75ca1cf8cff7b292396dd53673334d931ea52b6d65064b94999db5ab6227dd85", kill_on_drop: false }`
[INFO] [stdout] 75ca1cf8cff7b292396dd53673334d931ea52b6d65064b94999db5ab6227dd85