[INFO] updating cached repository https://github.com/UniversityRadioYork/silentjack-rs
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 24ce895e6ba830da2db021858cf2d92c7b2de097
[INFO] testing UniversityRadioYork/silentjack-rs against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUniversityRadioYork%2Fsilentjack-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/UniversityRadioYork/silentjack-rs on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/UniversityRadioYork/silentjack-rs
[INFO] finished tweaking git repo https://github.com/UniversityRadioYork/silentjack-rs
[INFO] tweaked toml for git repo https://github.com/UniversityRadioYork/silentjack-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/UniversityRadioYork/silentjack-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d63c81295ac893d6be9c405a9d1aaedc2181d000dab8db058aaa72bde4f40395
[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" "d63c81295ac893d6be9c405a9d1aaedc2181d000dab8db058aaa72bde4f40395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d63c81295ac893d6be9c405a9d1aaedc2181d000dab8db058aaa72bde4f40395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d63c81295ac893d6be9c405a9d1aaedc2181d000dab8db058aaa72bde4f40395", kill_on_drop: false }`
[INFO] [stdout] d63c81295ac893d6be9c405a9d1aaedc2181d000dab8db058aaa72bde4f40395
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3c2cb79581aa90a56ac95458de4c42750f0f797ec1ff42c1b9cbca19f46389e
[INFO] running `Command { std: "docker" "start" "-a" "f3c2cb79581aa90a56ac95458de4c42750f0f797ec1ff42c1b9cbca19f46389e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling jack-sys v0.2.0
[INFO] [stderr]    Compiling jack v0.6.2
[INFO] [stderr]    Compiling silentjack-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `db2lin`
[INFO] [stdout]   --> src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn db2lin(db: f32) -> f32 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.silentjack_rs.51lx85n3-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba" "/opt/rustwide/target/debug/deps/silentjack_rs-003b716b8783b1ba.2bgnfxrzannwr97.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libjack-028e04f8bdfae2ac.rlib" "/opt/rustwide/target/debug/deps/libjack_sys-e8c97514bdb9c5f7.rlib" "/opt/rustwide/target/debug/deps/liblibloading-1ddb0d6447a755c9.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-7c0477ae3415ac1f.rlib" "/opt/rustwide/target/debug/deps/libclap-9107db7ec1fdcb33.rlib" "/opt/rustwide/target/debug/deps/libvec_map-5dc04564fb1f035e.rlib" "/opt/rustwide/target/debug/deps/libtextwrap-aa5cd5e90742cdf0.rlib" "/opt/rustwide/target/debug/deps/libunicode_width-1f71f8e1b468a0fb.rlib" "/opt/rustwide/target/debug/deps/libstrsim-e44af4ab13090443.rlib" "/opt/rustwide/target/debug/deps/libbitflags-56eca94422237621.rlib" "/opt/rustwide/target/debug/deps/libatty-7aa8f5a22faa98ba.rlib" "/opt/rustwide/target/debug/deps/liblibc-2791035cf8f71fb1.rlib" "/opt/rustwide/target/debug/deps/libansi_term-22553bc1a6ab7a23.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-5989bcf78182f65e.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-4d6da34bc177af8d.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-10e0d6c948699482.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-c2318e2415657781.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-3815b93ed84badbb.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-d7999143d95238cb.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-c58298a0d40df8b8.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-b7de97e2ba6fb4e2.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-6f71c9f654d72cce.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-95ea48ddc44a311b.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-7402cd4761aebc14.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-68f423c59dc48a40.rlib" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-54580c7798bf2225.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-95a4d456339b7385.rlib" "-Wl,-Bdynamic" "-ljack" "-ldl" "-lutil" "-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] [stderr] error: could not compile `silentjack-rs`.
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f3c2cb79581aa90a56ac95458de4c42750f0f797ec1ff42c1b9cbca19f46389e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3c2cb79581aa90a56ac95458de4c42750f0f797ec1ff42c1b9cbca19f46389e", kill_on_drop: false }`
[INFO] [stdout] f3c2cb79581aa90a56ac95458de4c42750f0f797ec1ff42c1b9cbca19f46389e