[INFO] updating cached repository https://github.com/plorefice/b2048
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c0b69071e81abb9bdb12a77ab73f33af61b8576
[INFO] testing plorefice/b2048 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fplorefice%2Fb2048" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/plorefice/b2048 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/plorefice/b2048
[INFO] finished tweaking git repo https://github.com/plorefice/b2048
[INFO] tweaked toml for git repo https://github.com/plorefice/b2048 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/plorefice/b2048 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 110def9fb4715e5b6122373688d749409fcd6a5be10f2fbb2934cea3be93fe8a
[INFO] running `"docker" "start" "-a" "110def9fb4715e5b6122373688d749409fcd6a5be10f2fbb2934cea3be93fe8a"`
[INFO] [stderr]    Compiling num-traits v0.1.42
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling stable_deref_trait v1.0.0
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling unicode-segmentation v1.2.0
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling rand v0.3.20
[INFO] [stderr]    Compiling num-integer v0.1.35
[INFO] [stderr]    Compiling ncurses v5.91.0
[INFO] [stderr]    Compiling num-iter v0.1.34
[INFO] [stderr]    Compiling num-bigint v0.1.41
[INFO] [stderr]    Compiling num-complex v0.1.41
[INFO] [stderr]    Compiling num-rational v0.1.41
[INFO] [stderr]    Compiling num v0.1.41
[INFO] [stderr]    Compiling toml v0.4.5
[INFO] [stderr]    Compiling cursive v0.7.5
[INFO] [stderr]    Compiling b2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` 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/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.b2048.9klonk03-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5" "/opt/rustwide/target/debug/deps/b2048-b9df39aafa43e7f5.1qkiohhjcbm2ihje.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib/x86_64-linux-gnu" "-L" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libcursive-0e3a4d3201eb34b2.rlib" "/opt/rustwide/target/debug/deps/libncurses-c45db7260c82f6f3.rlib" "/opt/rustwide/target/debug/deps/libunicode_width-058570a6286818eb.rlib" "/opt/rustwide/target/debug/deps/libunicode_segmentation-97e55880d3683df3.rlib" "/opt/rustwide/target/debug/deps/libtoml-c6f377a0e33187f4.rlib" "/opt/rustwide/target/debug/deps/libserde-78ec9758a4f65c6a.rlib" "/opt/rustwide/target/debug/deps/libowning_ref-13a6dbae81f70608.rlib" "/opt/rustwide/target/debug/deps/libstable_deref_trait-62f3a808b340841f.rlib" "/opt/rustwide/target/debug/deps/libnum-b333c54c136086f2.rlib" "/opt/rustwide/target/debug/deps/libnum_rational-2936778c35f2ba39.rlib" "/opt/rustwide/target/debug/deps/libnum_bigint-dc3d5ac41eb4468e.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-76ec6b2bf3cc37da.rlib" "/opt/rustwide/target/debug/deps/librustc_serialize-bfce5498649dc14e.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-f54179bfb5d51618.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-00248fd462c1965b.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-6d962154a64dda91.rlib" "/opt/rustwide/target/debug/deps/liblog-9275152affa81e69.rlib" "/opt/rustwide/target/debug/deps/liblog-9d2a463f4d766796.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-86922dddbd81b29b.rlib" "/opt/rustwide/target/debug/deps/libmaplit-3ab1354c9433c873.rlib" "/opt/rustwide/target/debug/deps/librand-842864a269ec590e.rlib" "/opt/rustwide/target/debug/deps/liblibc-ddabd3ed831c7936.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1dac1a412c98f50d.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-b7841fd014bf83a1.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-338c0763450dca22.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-5f2e5d11836e0967.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-81a9070bd3553adf.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-e297830377b95af4.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-b38b87f2dd197fa0.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-601015f2e15e7e26.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-439f3a589bd88586.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-57ab7e6ac23ce11f.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-3aec7f88778e912a.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-b6806800b307d4b9.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-e49d7651b12f7563.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-e8266574e26adcc3.rlib" "-Wl,-Bdynamic" "-lncursesw" "-lncurses" "-ltinfo" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lncursesw
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `b2048`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "110def9fb4715e5b6122373688d749409fcd6a5be10f2fbb2934cea3be93fe8a"`
[INFO] running `"docker" "rm" "-f" "110def9fb4715e5b6122373688d749409fcd6a5be10f2fbb2934cea3be93fe8a"`
[INFO] [stdout] 110def9fb4715e5b6122373688d749409fcd6a5be10f2fbb2934cea3be93fe8a