[INFO] fetching crate screech 0.4.0...
[INFO] testing screech-0.4.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate screech 0.4.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate screech 0.4.0 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 screech 0.4.0
[INFO] finished tweaking crates.io crate screech 0.4.0
[INFO] tweaked toml for crates.io crate screech 0.4.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] cab81614537f13c4db2069ec8d0d16a8f4b1747e71185f43c9f7612033c28210
[INFO] running `Command { std: "docker" "start" "-a" "cab81614537f13c4db2069ec8d0d16a8f4b1747e71185f43c9f7612033c28210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cab81614537f13c4db2069ec8d0d16a8f4b1747e71185f43c9f7612033c28210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cab81614537f13c4db2069ec8d0d16a8f4b1747e71185f43c9f7612033c28210", kill_on_drop: false }`
[INFO] [stdout] cab81614537f13c4db2069ec8d0d16a8f4b1747e71185f43c9f7612033c28210
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 1ecee315efbd566e2ff5cd99ee06cbfa1a3bd45cde723ca5d8de2a88d96344c2
[INFO] running `Command { std: "docker" "start" "-a" "1ecee315efbd566e2ff5cd99ee06cbfa1a3bd45cde723ca5d8de2a88d96344c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling screech v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "1ecee315efbd566e2ff5cd99ee06cbfa1a3bd45cde723ca5d8de2a88d96344c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ecee315efbd566e2ff5cd99ee06cbfa1a3bd45cde723ca5d8de2a88d96344c2", kill_on_drop: false }`
[INFO] [stdout] 1ecee315efbd566e2ff5cd99ee06cbfa1a3bd45cde723ca5d8de2a88d96344c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 2f1f5ed9536778237c7b212cf085228166310c97ffa83d385bdb44437f90871c
[INFO] running `Command { std: "docker" "start" "-a" "2f1f5ed9536778237c7b212cf085228166310c97ffa83d385bdb44437f90871c", kill_on_drop: false }`
[INFO] [stderr]    Compiling screech v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "2f1f5ed9536778237c7b212cf085228166310c97ffa83d385bdb44437f90871c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f1f5ed9536778237c7b212cf085228166310c97ffa83d385bdb44437f90871c", kill_on_drop: false }`
[INFO] [stdout] 2f1f5ed9536778237c7b212cf085228166310c97ffa83d385bdb44437f90871c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] f368c642f4b17c19caddf9042b5a747bb6cd4e1882a14e4ac215b5ce661067f4
[INFO] running `Command { std: "docker" "start" "-a" "f368c642f4b17c19caddf9042b5a747bb6cd4e1882a14e4ac215b5ce661067f4", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/screech-d362f0cd3c15ba34)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test clip::tests::test_play_loop_buffer_larger_than_sample ... ok
[INFO] [stdout] test clip::tests::test_play_oneshot ... ok
[INFO] [stdout] test clip::tests::test_play_loop_buffer_smaller_than_sample ... ok
[INFO] [stdout] test stream::tests::test_amplify ... ok
[INFO] [stdout] test stream::tests::test_from_i16 ... ok
[INFO] [stdout] test stream::tests::test_from_i32 ... ok
[INFO] [stdout] test stream::tests::test_from_u8 ... ok
[INFO] [stdout] test stream::tests::test_i16_to_point ... ok
[INFO] [stdout] test stream::tests::test_i32_to_point ... ok
[INFO] [stdout] test stream::tests::test_looped_slice ... ok
[INFO] [stdout] test stream::tests::test_slice ... ok
[INFO] [stdout] test stream::tests::test_mix ... ok
[INFO] [stdout] test stream::tests::test_u8_to_point ... ok
[INFO] [stdout] test track::tests::test_cv_to_db ... ok
[INFO] [stdout] test track::tests::test_panning_to_db ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests screech
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test src/track.rs - track::Track::new (line 19) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::is_mono (line 217) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::is_stereo (line 236) ... ok
[INFO] [stdout] test src/track.rs - track::Track::gain (line 37) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::and_then (line 115) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::empty (line 27) ... ok
[INFO] [stdout] test src/primary.rs - primary::Primary::new (line 21) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::sum_to_mono (line 256) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::map_stereo (line 85) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::len (line 43) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::mix (line 145) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::mix (line 73) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::amplify (line 99) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::get_interleaved_points (line 333) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::get_point (line 54) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::slice (line 120) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::map (line 54) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::silence (line 28) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::to_mono (line 282) ... ok
[INFO] [stdout] test src/stream.rs - stream::Stream::looped_slice (line 143) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::len (line 40) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::to_stereo (line 308) ... ok
[INFO] [stdout] test src/track.rs - track::Track::panning (line 68) ... ok
[INFO] [stdout] test src/signal.rs - signal::Signal::match_channels (line 198) ... ok
[INFO] [stdout] test src/primary.rs - primary::Primary::sample (line 47) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.04s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f368c642f4b17c19caddf9042b5a747bb6cd4e1882a14e4ac215b5ce661067f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f368c642f4b17c19caddf9042b5a747bb6cd4e1882a14e4ac215b5ce661067f4", kill_on_drop: false }`
[INFO] [stdout] f368c642f4b17c19caddf9042b5a747bb6cd4e1882a14e4ac215b5ce661067f4