[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 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6adbe33c586f9202664b24d47ad2cfdf729e096d3d1a48070ae63d52e133ddc9
[INFO] running `"docker" "start" "-a" "6adbe33c586f9202664b24d47ad2cfdf729e096d3d1a48070ae63d52e133ddc9"`
[INFO] [stderr]    Compiling sdl2-sys v0.32.5
[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/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.pong.aimmv6ef-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0" "/opt/crater/target/debug/deps/pong-a30e8c6f1edfb4f0.1k016xdkx5rkitow.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libsdl2-020d7d0fecdbf63c.rlib" "/opt/crater/target/debug/deps/librand-1959034b3506f590.rlib" "/opt/crater/target/debug/deps/librand_xorshift-6a66fc50e6498d00.rlib" "/opt/crater/target/debug/deps/librand_pcg-60ef83adabd8d47a.rlib" "/opt/crater/target/debug/deps/librand_hc-83283ab0a0ee3df8.rlib" "/opt/crater/target/debug/deps/librand_chacha-b9f5abd1824a7f75.rlib" "/opt/crater/target/debug/deps/librand_isaac-94fc18115e9afd61.rlib" "/opt/crater/target/debug/deps/librand_core-482fdfb44fe03c92.rlib" "/opt/crater/target/debug/deps/librand_os-0f15c87582ed0aff.rlib" "/opt/crater/target/debug/deps/librand_jitter-4e4a4328edc945b8.rlib" "/opt/crater/target/debug/deps/librand_core-a9179eebc82cf0f0.rlib" "/opt/crater/target/debug/deps/libsdl2_sys-6c7f326ca5134a05.rlib" "/opt/crater/target/debug/deps/libbitflags-6f632fff558bf385.rlib" "/opt/crater/target/debug/deps/liblazy_static-ab49020bde3ad45f.rlib" "/opt/crater/target/debug/deps/liblibc-e769383495013c75.rlib" "/opt/crater/target/debug/deps/libnum-558d8b228c2ea06c.rlib" "/opt/crater/target/debug/deps/libnum_iter-a7210c4b115aa645.rlib" "/opt/crater/target/debug/deps/libnum_integer-b313e99b23f6e865.rlib" "/opt/crater/target/debug/deps/libnum_traits-cd98387e0f6e90f9.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9895e8982b0a79e7.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-57306b8ed3378a0e.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-54463ae5adae3649.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-d99667b199a9875a.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-51f4300e102199f5.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-b3ccf1f7737a6a91.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-157c37a3ceb78853.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-505bcee45aafb736.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-c29abd529ba4452b.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-895383a3232f6572.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-5594cb4f559bc761.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-38e90baf978bc428.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" "6adbe33c586f9202664b24d47ad2cfdf729e096d3d1a48070ae63d52e133ddc9"`
[INFO] running `"docker" "rm" "-f" "6adbe33c586f9202664b24d47ad2cfdf729e096d3d1a48070ae63d52e133ddc9"`
[INFO] [stdout] 6adbe33c586f9202664b24d47ad2cfdf729e096d3d1a48070ae63d52e133ddc9