[INFO] fetching crate cow_arc 0.2.2...
[INFO] testing cow_arc-0.2.2 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate cow_arc 0.2.2 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate cow_arc 0.2.2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cow_arc 0.2.2
[INFO] finished tweaking crates.io crate cow_arc 0.2.2
[INFO] tweaked toml for crates.io crate cow_arc 0.2.2 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7092951d2dfc49a6ce31e860b035d78b62324042cdc1dab165f41ff6d32c68bb
[INFO] running `Command { std: "docker" "start" "-a" "7092951d2dfc49a6ce31e860b035d78b62324042cdc1dab165f41ff6d32c68bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7092951d2dfc49a6ce31e860b035d78b62324042cdc1dab165f41ff6d32c68bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7092951d2dfc49a6ce31e860b035d78b62324042cdc1dab165f41ff6d32c68bb", kill_on_drop: false }`
[INFO] [stdout] 7092951d2dfc49a6ce31e860b035d78b62324042cdc1dab165f41ff6d32c68bb
[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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fdecb8ef49017880caaa38b4870029ce066aca0429b7f8b966feabeb5ecc3ce
[INFO] running `Command { std: "docker" "start" "-a" "8fdecb8ef49017880caaa38b4870029ce066aca0429b7f8b966feabeb5ecc3ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow_arc v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "8fdecb8ef49017880caaa38b4870029ce066aca0429b7f8b966feabeb5ecc3ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fdecb8ef49017880caaa38b4870029ce066aca0429b7f8b966feabeb5ecc3ce", kill_on_drop: false }`
[INFO] [stdout] 8fdecb8ef49017880caaa38b4870029ce066aca0429b7f8b966feabeb5ecc3ce
[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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c574f3a3b57f4821d002e408f3732847f52c741d0fdcc575bdeda03dd2390dab
[INFO] running `Command { std: "docker" "start" "-a" "c574f3a3b57f4821d002e408f3732847f52c741d0fdcc575bdeda03dd2390dab", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow_arc v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "c574f3a3b57f4821d002e408f3732847f52c741d0fdcc575bdeda03dd2390dab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c574f3a3b57f4821d002e408f3732847f52c741d0fdcc575bdeda03dd2390dab", kill_on_drop: false }`
[INFO] [stdout] c574f3a3b57f4821d002e408f3732847f52c741d0fdcc575bdeda03dd2390dab
[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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fb044240476788d2546a3f6852cf18cec4f79e69c14421c1c261680df2de1a08
[INFO] running `Command { std: "docker" "start" "-a" "fb044240476788d2546a3f6852cf18cec4f79e69c14421c1c261680df2de1a08", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cow_arc-4dc3ca486a6d1f15)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_cow_arc ... 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]    Doc-tests cow_arc
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - CowArc<T>::update_val (line 55) ... ok
[INFO] [stdout] test src/lib.rs - CowArc<T>::set_val (line 31) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.35s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fb044240476788d2546a3f6852cf18cec4f79e69c14421c1c261680df2de1a08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb044240476788d2546a3f6852cf18cec4f79e69c14421c1c261680df2de1a08", kill_on_drop: false }`
[INFO] [stdout] fb044240476788d2546a3f6852cf18cec4f79e69c14421c1c261680df2de1a08