[INFO] updating cached repository pako8128/pong
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pako8128/pong
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pako8128/pong" "work/ex/beta-1.37-6/sources/1.36.0/gh/pako8128/pong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/pako8128/pong'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pako8128/pong" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pako8128/pong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pako8128/pong'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3245ba30d5c313a604e051d7096e0466a1b52f66
[INFO] sha for GitHub repo pako8128/pong: 3245ba30d5c313a604e051d7096e0466a1b52f66
[INFO] validating manifest of pako8128/pong on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pako8128/pong on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pako8128/pong
[INFO] finished frobbing pako8128/pong
[INFO] frobbed toml for pako8128/pong written to work/ex/beta-1.37-6/sources/1.36.0/gh/pako8128/pong/Cargo.toml
[INFO] started frobbing pako8128/pong
[INFO] finished frobbing pako8128/pong
[INFO] frobbed toml for pako8128/pong written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pako8128/pong/Cargo.toml
[INFO] crate pako8128/pong already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pako8128/pong against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pako8128/pong:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b7ce7fc08c80e94f02d325a93cd1e2978ae82d00e6d8c236c440c88434a08000
[INFO] running `"docker" "start" "-a" "b7ce7fc08c80e94f02d325a93cd1e2978ae82d00e6d8c236c440c88434a08000"`
[INFO] [stderr]    Compiling sdl2-sys v0.32.5
[INFO] [stderr]    Compiling rand_os v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling sdl2 v0.32.1
[INFO] [stderr]    Compiling pong v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `timer`
[INFO] [stderr]   --> src/main.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut timer = sdl_context.timer().unwrap();
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_timer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut timer = sdl_context.timer().unwrap();
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `speed_up`
[INFO] [stderr]   --> src/objects.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn speed_up(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.pong.f54o59xv-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b" "/opt/crater/target/debug/deps/pong-45dcb7c893b7b64b.5b8ufyb281wptezr.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libsdl2-41f269ecb27474ff.rlib" "/opt/crater/target/debug/deps/librand-0714cb1291ca71f0.rlib" "/opt/crater/target/debug/deps/librand_xorshift-5e391b21601b8393.rlib" "/opt/crater/target/debug/deps/librand_pcg-e2e1a0d1728dcbd2.rlib" "/opt/crater/target/debug/deps/librand_hc-8d037a8bb74cc960.rlib" "/opt/crater/target/debug/deps/librand_chacha-caac59cbe4bbf74d.rlib" "/opt/crater/target/debug/deps/librand_isaac-8a1220a5cdc55703.rlib" "/opt/crater/target/debug/deps/librand_core-5af554ddf81cd17c.rlib" "/opt/crater/target/debug/deps/librand_os-35bfa1e03782fac8.rlib" "/opt/crater/target/debug/deps/librand_jitter-94868213c3989353.rlib" "/opt/crater/target/debug/deps/librand_core-4c9a550ae16dbf0f.rlib" "/opt/crater/target/debug/deps/libsdl2_sys-78c3a1bc1a6bdb5c.rlib" "/opt/crater/target/debug/deps/libbitflags-e31ad08aaa94ea6a.rlib" "/opt/crater/target/debug/deps/liblazy_static-6758b07bea2a83cb.rlib" "/opt/crater/target/debug/deps/liblibc-11dae9e8948326fe.rlib" "/opt/crater/target/debug/deps/libnum-6d1c41becdc658de.rlib" "/opt/crater/target/debug/deps/libnum_iter-6a53ebaecf43d64b.rlib" "/opt/crater/target/debug/deps/libnum_integer-3e4b662ece72588f.rlib" "/opt/crater/target/debug/deps/libnum_traits-b0613bcbd790bfdc.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-a80a1e8e09cafef8.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e0e6351da805c468.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-e04f54bafc95e331.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-67901d3322495bd5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-bd390b1abaceaec1.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-312dd37fdc7bedfc.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8ed0e51d58d644a3.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-8a423c320a6c707f.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d6a95598e2238263.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d231614b153016eb.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-3821619027f463e4.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-1cfd794d18771a44.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-dcf33cf10c2452ef.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-c258fea34bf64bce.rlib" "-Wl,-Bdynamic" "-lSDL2" "-lSDL2_image" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lSDL2_image
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `pong`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b7ce7fc08c80e94f02d325a93cd1e2978ae82d00e6d8c236c440c88434a08000"`
[INFO] running `"docker" "rm" "-f" "b7ce7fc08c80e94f02d325a93cd1e2978ae82d00e6d8c236c440c88434a08000"`
[INFO] [stdout] b7ce7fc08c80e94f02d325a93cd1e2978ae82d00e6d8c236c440c88434a08000