[INFO] fetching crate sing 0.1.1...
[INFO] testing sing-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sing 0.1.1 into /workspace/builds/worker-109/source
[INFO] validating manifest of crates.io crate sing 0.1.1 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 crates.io crate sing 0.1.1
[INFO] finished tweaking crates.io crate sing 0.1.1
[INFO] tweaked toml for crates.io crate sing 0.1.1 written to /workspace/builds/worker-109/source/Cargo.toml
[INFO] crate crates.io crate sing 0.1.1 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 ansi_term v0.7.5
[INFO] [stderr]   Downloaded coreaudio-sys v0.2.3
[INFO] [stderr]   Downloaded ogg v0.7.0
[INFO] [stderr]   Downloaded cpal v0.10.0
[INFO] [stderr]   Downloaded claxon v0.4.2
[INFO] [stderr]   Downloaded minimp3-sys v0.3.1
[INFO] [stderr]   Downloaded slice-deque v0.2.4
[INFO] [stderr]   Downloaded minimp3 v0.3.3
[INFO] [stderr]   Downloaded rodio v0.10.0
[INFO] [stderr]   Downloaded spinner v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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] fc5d5d310a24c099cf310aec8abf7e3f865f72ad35db965c9934b44d91a25734
[INFO] running `Command { std: "docker" "start" "-a" "fc5d5d310a24c099cf310aec8abf7e3f865f72ad35db965c9934b44d91a25734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc5d5d310a24c099cf310aec8abf7e3f865f72ad35db965c9934b44d91a25734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc5d5d310a24c099cf310aec8abf7e3f865f72ad35db965c9934b44d91a25734", kill_on_drop: false }`
[INFO] [stdout] fc5d5d310a24c099cf310aec8abf7e3f865f72ad35db965c9934b44d91a25734
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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] 047c918508535e4cfa5a06f2b1becc94249ef4f93f1a8f4fd68776d245eccbae
[INFO] running `Command { std: "docker" "start" "-a" "047c918508535e4cfa5a06f2b1becc94249ef4f93f1a8f4fd68776d245eccbae", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cpal v0.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling ansi_term v0.7.5
[INFO] [stderr]    Compiling claxon v0.4.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling ogg v0.7.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling minimp3-sys v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling slice-deque v0.2.4
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling lewton v0.9.4
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling spinner v0.5.0
[INFO] [stderr]    Compiling minimp3 v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling rodio v0.10.0
[INFO] [stderr]    Compiling sing v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.98s
[INFO] running `Command { std: "docker" "inspect" "047c918508535e4cfa5a06f2b1becc94249ef4f93f1a8f4fd68776d245eccbae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "047c918508535e4cfa5a06f2b1becc94249ef4f93f1a8f4fd68776d245eccbae", kill_on_drop: false }`
[INFO] [stdout] 047c918508535e4cfa5a06f2b1becc94249ef4f93f1a8f4fd68776d245eccbae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 106cc2da0d8e7fdc842f25c3ef0f4f0f9b661cc48cd90518c47e3e8804179dff
[INFO] running `Command { std: "docker" "start" "-a" "106cc2da0d8e7fdc842f25c3ef0f4f0f9b661cc48cd90518c47e3e8804179dff", kill_on_drop: false }`
[INFO] [stderr]    Compiling sing v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "106cc2da0d8e7fdc842f25c3ef0f4f0f9b661cc48cd90518c47e3e8804179dff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "106cc2da0d8e7fdc842f25c3ef0f4f0f9b661cc48cd90518c47e3e8804179dff", kill_on_drop: false }`
[INFO] [stdout] 106cc2da0d8e7fdc842f25c3ef0f4f0f9b661cc48cd90518c47e3e8804179dff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b9cf78ee840cf0142e30c8ae22eb9017ce1895fe4c03f60b93f7e24c8d67397a
[INFO] running `Command { std: "docker" "start" "-a" "b9cf78ee840cf0142e30c8ae22eb9017ce1895fe4c03f60b93f7e24c8d67397a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sing-1824faebbe51e6aa)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test note::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sing-35459272e1420761)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sing
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b9cf78ee840cf0142e30c8ae22eb9017ce1895fe4c03f60b93f7e24c8d67397a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9cf78ee840cf0142e30c8ae22eb9017ce1895fe4c03f60b93f7e24c8d67397a", kill_on_drop: false }`
[INFO] [stdout] b9cf78ee840cf0142e30c8ae22eb9017ce1895fe4c03f60b93f7e24c8d67397a