[INFO] cloning repository https://github.com/mlang/jackdots
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mlang/jackdots" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlang%2Fjackdots", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlang%2Fjackdots'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 302a6e1a72263de1f09cbcf2fa2b1f53244bb742
[INFO] testing mlang/jackdots against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlang%2Fjackdots" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mlang/jackdots on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mlang/jackdots
[INFO] finished tweaking git repo https://github.com/mlang/jackdots
[INFO] tweaked toml for git repo https://github.com/mlang/jackdots written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/mlang/jackdots already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e385bf22a49a8ce0d67a7ee624dcca9181d6451ecdbbbd98f10bd8620e535f2e
[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" "e385bf22a49a8ce0d67a7ee624dcca9181d6451ecdbbbd98f10bd8620e535f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e385bf22a49a8ce0d67a7ee624dcca9181d6451ecdbbbd98f10bd8620e535f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e385bf22a49a8ce0d67a7ee624dcca9181d6451ecdbbbd98f10bd8620e535f2e", kill_on_drop: false }`
[INFO] [stdout] e385bf22a49a8ce0d67a7ee624dcca9181d6451ecdbbbd98f10bd8620e535f2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67858f8ab6b6bdce76dfed885e04e3bc18593c77f85e7a2dac2cd5d64ee7376b
[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" "67858f8ab6b6bdce76dfed885e04e3bc18593c77f85e7a2dac2cd5d64ee7376b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling ringbuf v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling jack-sys v0.2.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling jack v0.6.2
[INFO] [stderr]    Compiling rustfft v3.0.1
[INFO] [stderr]    Compiling jackdots v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/main.rs:90:16
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub fn new(cells: usize) -> Self {
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Spectrum`
[INFO] [stdout]  --> src/main.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     PeakMeter, Spectrum
[INFO] [stdout]   |                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |             client.connect_ports(&port, &in_1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |             io::stdout().flush();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.jackdots.auiqs3eh-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a" "/opt/rustwide/target/debug/deps/jackdots-15aebedc8cd2d79a.8nigncz3gerfftd.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libjack-ab62153e3963256c.rlib" "/opt/rustwide/target/debug/deps/libjack_sys-a1c4f3591365664a.rlib" "/opt/rustwide/target/debug/deps/liblibloading-bfc3fa06f492bd8f.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-bf21cfb31a9e28ca.rlib" "/opt/rustwide/target/debug/deps/libclap-6266e0893ec2c861.rlib" "/opt/rustwide/target/debug/deps/libvec_map-0f0153d8a4934ee0.rlib" "/opt/rustwide/target/debug/deps/libtextwrap-2ae0fc66a2be9cbd.rlib" "/opt/rustwide/target/debug/deps/libunicode_width-e48abc2933969712.rlib" "/opt/rustwide/target/debug/deps/libstrsim-b4c20f59be0036a3.rlib" "/opt/rustwide/target/debug/deps/libbitflags-e8b42ad6d332332e.rlib" "/opt/rustwide/target/debug/deps/libatty-285a156a073f8401.rlib" "/opt/rustwide/target/debug/deps/liblibc-be60e1470675d7ff.rlib" "/opt/rustwide/target/debug/deps/libansi_term-aefa377f3787504e.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-f14aca24435a5414.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-48d342a8b48d1d01.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-14bc0820888c8eb3.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-9cbd9e217bff06bc.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-31826136df98934e.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-075976a117c8fd5d.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-2d5cbedfbf17a011.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-0474372ff08c5319.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-d437c34460d2315a.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-fb61ed1b8cc4de79.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-bf76d1b643bfc9f0.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-a1b53aa7fddcf418.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-28585e57fac45c73.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-64801769bc15ab28.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-541997b56bb98660.rlib" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-cdea3c81adab3d12.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.47.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-cd9f15a39fb65cbc.rlib" "-Wl,-Bdynamic" "-ljack" "-ldl" "-lutil" "-ldl" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -ljack
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jackdots`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "67858f8ab6b6bdce76dfed885e04e3bc18593c77f85e7a2dac2cd5d64ee7376b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67858f8ab6b6bdce76dfed885e04e3bc18593c77f85e7a2dac2cd5d64ee7376b", kill_on_drop: false }`
[INFO] [stdout] 67858f8ab6b6bdce76dfed885e04e3bc18593c77f85e7a2dac2cd5d64ee7376b
