[INFO] cloning repository https://github.com/discordance/rust_sampler_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/discordance/rust_sampler_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdiscordance%2Frust_sampler_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdiscordance%2Frust_sampler_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d8446b10d6e3f5c1e95be2c9ee1dc88a25558f35
[INFO] testing discordance/rust_sampler_test against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdiscordance%2Frust_sampler_test" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/discordance/rust_sampler_test on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/discordance/rust_sampler_test
[INFO] finished tweaking git repo https://github.com/discordance/rust_sampler_test
[INFO] tweaked toml for git repo https://github.com/discordance/rust_sampler_test written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/discordance/rust_sampler_test already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded nix v0.9.0
[INFO] [stderr]   Downloaded toml v0.5.0
[INFO] [stderr]   Downloaded as-slice v0.1.3
[INFO] [stderr]   Downloaded alsa v0.2.1
[INFO] [stderr]   Downloaded winmm-sys v0.2.0
[INFO] [stderr]   Downloaded ucd-util v0.1.2
[INFO] [stderr]   Downloaded elapsed v0.1.2
[INFO] [stderr]   Downloaded coremidi v0.3.0
[INFO] [stderr]   Downloaded easer v0.2.1
[INFO] [stderr]   Downloaded midir v0.5.0
[INFO] [stderr]   Downloaded time_calc v0.13.0
[INFO] [stderr]   Downloaded wmidi v1.1.0
[INFO] [stderr]   Downloaded sample v0.10.0
[INFO] [stderr]   Downloaded heapless v0.5.3
[INFO] [stderr]   Downloaded memalloc v0.1.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.28
[INFO] [stderr]   Downloaded coremidi-sys v2.0.2
[INFO] [stderr]   Downloaded svg v0.5.12
[INFO] [stderr]   Downloaded backtrace v0.3.20
[INFO] [stderr]   Downloaded regex-syntax v0.6.16
[INFO] [stderr]   Downloaded plotlib v0.4.0
[INFO] [stderr]   Downloaded rosc v0.1.6
[INFO] [stderr]   Downloaded syn v0.15.32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64ce90043b4e05198e6a2b53477c4b3e84f3c7382978839a578af4d116fad212
[INFO] running `Command { std: "docker" "start" "-a" "64ce90043b4e05198e6a2b53477c4b3e84f3c7382978839a578af4d116fad212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64ce90043b4e05198e6a2b53477c4b3e84f3c7382978839a578af4d116fad212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64ce90043b4e05198e6a2b53477c4b3e84f3c7382978839a578af4d116fad212", kill_on_drop: false }`
[INFO] [stdout] 64ce90043b4e05198e6a2b53477c4b3e84f3c7382978839a578af4d116fad212
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5a55e0a459dc5b380e1065027e06a46384577dcada5935b60d29c08e2506817
[INFO] running `Command { std: "docker" "start" "-a" "f5a55e0a459dc5b380e1065027e06a46384577dcada5935b60d29c08e2506817", kill_on_drop: false }`
[INFO] [stderr] error: multiple packages link to native library `alsa`, but a native library can be linked only once
[INFO] [stderr] 
[INFO] [stderr] package `alsa-sys v0.1.1 (https://github.com/discordance/cpal.git#ef7a4b60)`
[INFO] [stderr]     ... which is depended on by `cpal v0.8.2 (https://github.com/discordance/cpal.git#ef7a4b60)`
[INFO] [stderr]     ... which is depended on by `smplr v0.0.2 (/opt/rustwide/workdir)`
[INFO] [stderr] links to native library `alsa`
[INFO] [stderr] 
[INFO] [stderr] package `alsa-sys v0.1.2`
[INFO] [stderr]     ... which is depended on by `alsa v0.2.1`
[INFO] [stderr]     ... which is depended on by `midir v0.5.0`
[INFO] [stderr]     ... which is depended on by `smplr v0.0.2 (/opt/rustwide/workdir)`
[INFO] [stderr] also links to native library `alsa`
[INFO] running `Command { std: "docker" "inspect" "f5a55e0a459dc5b380e1065027e06a46384577dcada5935b60d29c08e2506817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5a55e0a459dc5b380e1065027e06a46384577dcada5935b60d29c08e2506817", kill_on_drop: false }`
[INFO] [stdout] f5a55e0a459dc5b380e1065027e06a46384577dcada5935b60d29c08e2506817