[INFO] fetching crate rb 0.4.1...
[INFO] testing rb-0.4.1 against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4
[INFO] extracting crate rb 0.4.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rb 0.4.1 on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rb 0.4.1
[INFO] finished tweaking crates.io crate rb 0.4.1
[INFO] tweaked toml for crates.io crate rb 0.4.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rb 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13a087b8eb22ad985d840e581a63a3084d054d02e1a4814db2a17ca1b0d0084e
[INFO] running `Command { std: "docker" "start" "-a" "13a087b8eb22ad985d840e581a63a3084d054d02e1a4814db2a17ca1b0d0084e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13a087b8eb22ad985d840e581a63a3084d054d02e1a4814db2a17ca1b0d0084e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13a087b8eb22ad985d840e581a63a3084d054d02e1a4814db2a17ca1b0d0084e", kill_on_drop: false }`
[INFO] [stdout] 13a087b8eb22ad985d840e581a63a3084d054d02e1a4814db2a17ca1b0d0084e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 38e6437a8e5e59fee7206bda93f8055ff89cfd92d1def4b5b15ca6a8913acb1e
[INFO] running `Command { std: "docker" "start" "-a" "38e6437a8e5e59fee7206bda93f8055ff89cfd92d1def4b5b15ca6a8913acb1e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rb v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "38e6437a8e5e59fee7206bda93f8055ff89cfd92d1def4b5b15ca6a8913acb1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e6437a8e5e59fee7206bda93f8055ff89cfd92d1def4b5b15ca6a8913acb1e", kill_on_drop: false }`
[INFO] [stdout] 38e6437a8e5e59fee7206bda93f8055ff89cfd92d1def4b5b15ca6a8913acb1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 4c725a22f66737b5c22bb94fcc1440e34bd70f673478175c379569b83bdcac84
[INFO] running `Command { std: "docker" "start" "-a" "4c725a22f66737b5c22bb94fcc1440e34bd70f673478175c379569b83bdcac84", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_xorshift v0.3.0
[INFO] [stderr]    Compiling rb v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "4c725a22f66737b5c22bb94fcc1440e34bd70f673478175c379569b83bdcac84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c725a22f66737b5c22bb94fcc1440e34bd70f673478175c379569b83bdcac84", kill_on_drop: false }`
[INFO] [stdout] 4c725a22f66737b5c22bb94fcc1440e34bd70f673478175c379569b83bdcac84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] cfdddeea885e7e7bf1ba5eb6290b50e6a633445cadfc0cfbd2cefdfae23ee03f
[INFO] running `Command { std: "docker" "start" "-a" "cfdddeea885e7e7bf1ba5eb6290b50e6a633445cadfc0cfbd2cefdfae23ee03f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/rb-5e438adb384f446c)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test tests::get_from_empty_buffer_returns_error ... ok
[INFO] [stdout] test tests::read_from_empty_buffer_returns_error ... ok
[INFO] [stdout] test tests::get_to_empty_buffer_returns_zero ... ok
[INFO] [stdout] test tests::write_blocking_timeout_empty_buffer_returns_zero ... ok
[INFO] [stdout] test tests::get_with_wrapping ... ok
[INFO] [stdout] test tests::read_to_empty_buffer_returns_zero ... ok
[INFO] [stdout] test tests::read_equals_get_and_skip ... ok
[INFO] [stdout] test tests::write_empty_buffer_returns_zero ... ok
[INFO] [stdout] test tests::read_blocking_to_empty_buffer_returns_none ... ok
[INFO] [stdout] test tests::get_with_wrapping_2 ... ok
[INFO] [stdout] test tests::write_blocking_empty_buffer_returns_zero ... ok
[INFO] [stdout] test tests::read_blocking_timeout_to_empty_buffer_returns_none ... ok
[INFO] [stdout] test tests::write_to_full_queue_returns_error ... ok
[INFO] [stdout] test tests::read_blocking_timeout_times_out ... ok
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/test-ade2f91919f647ed)
[INFO] [stdout] test tests::write_blocking_timeout_times_out ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.11s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test test_clear ... ok
[INFO] [stdout] test test_wrap_around ... ok
[INFO] [stdout] test test_get ... ok
[INFO] [stdout] test test_skip ... ok
[INFO] [stderr]      Running tests/threads.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/threads-7d44a1ffc5fd65ca)
[INFO] [stdout] test test_read_write_wrap_blocking ... ok
[INFO] [stdout] test test_write ... ok
[INFO] [stdout] test test_read_write_wrap ... ok
[INFO] [stdout] test test_read ... ok
[INFO] [stdout] test test_read_write_timeout_wrap_blocking ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test_threads_blocking_timeout ... ok
[INFO] [stdout] test test_threads ... ok
[INFO] [stdout] test test_threads_blocking ... ok
[INFO] [stdout] test test_threads_count_underflow ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.21s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cfdddeea885e7e7bf1ba5eb6290b50e6a633445cadfc0cfbd2cefdfae23ee03f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfdddeea885e7e7bf1ba5eb6290b50e6a633445cadfc0cfbd2cefdfae23ee03f", kill_on_drop: false }`
[INFO] [stdout] cfdddeea885e7e7bf1ba5eb6290b50e6a633445cadfc0cfbd2cefdfae23ee03f