[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-1.38-1/sources/1.37.0/gh/pako8128/pong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pako8128/pong'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pako8128/pong" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pako8128/pong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pako8128/pong on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pako8128/pong against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 3629ef191f754fbe98945a9052d94d06495cd3094f1696deb26fcec451ebe20f
[INFO] running `"docker" "start" "-a" "3629ef191f754fbe98945a9052d94d06495cd3094f1696deb26fcec451ebe20f"`
[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/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.pong.4u6vz97t-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd" "/opt/crater/target/debug/deps/pong-c7cb7ef6e320a0fd.13pfh4pebtd6nmy5.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libsdl2-9f29316ca7927c90.rlib" "/opt/crater/target/debug/deps/librand-4cf826a9dddb7652.rlib" "/opt/crater/target/debug/deps/librand_xorshift-7b19cb00158fa6fb.rlib" "/opt/crater/target/debug/deps/librand_pcg-65721c37f161e149.rlib" "/opt/crater/target/debug/deps/librand_hc-0652ab44c5db9eb2.rlib" "/opt/crater/target/debug/deps/librand_chacha-11361bf4dfc3f2ea.rlib" "/opt/crater/target/debug/deps/librand_isaac-a4f79f4126c1f25d.rlib" "/opt/crater/target/debug/deps/librand_core-4dce960811a60b1d.rlib" "/opt/crater/target/debug/deps/librand_os-d51ed93391c7fead.rlib" "/opt/crater/target/debug/deps/librand_jitter-3f7e8a2892ed93ea.rlib" "/opt/crater/target/debug/deps/librand_core-948b7aad8fedc31f.rlib" "/opt/crater/target/debug/deps/libsdl2_sys-1026a1a4c54488f1.rlib" "/opt/crater/target/debug/deps/libbitflags-67998902f09e32c1.rlib" "/opt/crater/target/debug/deps/liblazy_static-df8b3d370f96c908.rlib" "/opt/crater/target/debug/deps/liblibc-c18a3aca785594a7.rlib" "/opt/crater/target/debug/deps/libnum-d77c5714bd491da7.rlib" "/opt/crater/target/debug/deps/libnum_iter-c2670023c017b43e.rlib" "/opt/crater/target/debug/deps/libnum_integer-2746dc7a3b917a7f.rlib" "/opt/crater/target/debug/deps/libnum_traits-b79693a5d7e93180.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1d6d86bd078a28e9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e9721e46a424e2a9.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-c07193698f282147.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-6da45690f3863086.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-690797036dd27680.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-d3896ccbfd8eda2b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-7cccc3739e3d7623.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-5e9ba178a513cd29.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-5ca9f83bf63d1f4b.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-bba1c7ef9e950882.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e23c9de62012deb5.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-9b59dffdcd513d5d.rlib" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-17392340ab2e4a97.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/beta-2019-08-13-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ac21508a81e3f7f3.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" "3629ef191f754fbe98945a9052d94d06495cd3094f1696deb26fcec451ebe20f"`
[INFO] running `"docker" "rm" "-f" "3629ef191f754fbe98945a9052d94d06495cd3094f1696deb26fcec451ebe20f"`
[INFO] [stdout] 3629ef191f754fbe98945a9052d94d06495cd3094f1696deb26fcec451ebe20f