[INFO] fetching crate synchronized-writer 1.1.9...
[INFO] testing synchronized-writer-1.1.9 against 1.49.0 for beta-1.50-1
[INFO] extracting crate synchronized-writer 1.1.9 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate synchronized-writer 1.1.9 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synchronized-writer 1.1.9
[INFO] finished tweaking crates.io crate synchronized-writer 1.1.9
[INFO] tweaked toml for crates.io crate synchronized-writer 1.1.9 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2371eee6d9caf22fe3b344ffac4013125bbcce56a99d615c9eb52fc01f695929
[INFO] running `Command { std: "docker" "start" "-a" "2371eee6d9caf22fe3b344ffac4013125bbcce56a99d615c9eb52fc01f695929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2371eee6d9caf22fe3b344ffac4013125bbcce56a99d615c9eb52fc01f695929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2371eee6d9caf22fe3b344ffac4013125bbcce56a99d615c9eb52fc01f695929", kill_on_drop: false }`
[INFO] [stdout] 2371eee6d9caf22fe3b344ffac4013125bbcce56a99d615c9eb52fc01f695929
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fc7a3d5e919e5a56419f031af18f87ce62ed1928d92c3c14d9d1b959079774f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2fc7a3d5e919e5a56419f031af18f87ce62ed1928d92c3c14d9d1b959079774f", kill_on_drop: false }`
[INFO] [stderr]    Compiling synchronized-writer v1.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "2fc7a3d5e919e5a56419f031af18f87ce62ed1928d92c3c14d9d1b959079774f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fc7a3d5e919e5a56419f031af18f87ce62ed1928d92c3c14d9d1b959079774f", kill_on_drop: false }`
[INFO] [stdout] 2fc7a3d5e919e5a56419f031af18f87ce62ed1928d92c3c14d9d1b959079774f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 304cba41f26bdb74042b42547c591dc3030a63281e37036ca2ff6cb5ec3cf8fe
[INFO] running `Command { std: "docker" "start" "-a" "304cba41f26bdb74042b42547c591dc3030a63281e37036ca2ff6cb5ec3cf8fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling synchronized-writer v1.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "304cba41f26bdb74042b42547c591dc3030a63281e37036ca2ff6cb5ec3cf8fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "304cba41f26bdb74042b42547c591dc3030a63281e37036ca2ff6cb5ec3cf8fe", kill_on_drop: false }`
[INFO] [stdout] 304cba41f26bdb74042b42547c591dc3030a63281e37036ca2ff6cb5ec3cf8fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f9fdedaa69c503a90216777faa2688f2abc748345f4dc6e06d0fc063fca441b8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f9fdedaa69c503a90216777faa2688f2abc748345f4dc6e06d0fc063fca441b8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/synchronized_writer-5b032dafdc1f183c
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests synchronized-writer
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 40) ... ok
[INFO] [stdout] test src/lib.rs - (line 7) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f9fdedaa69c503a90216777faa2688f2abc748345f4dc6e06d0fc063fca441b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9fdedaa69c503a90216777faa2688f2abc748345f4dc6e06d0fc063fca441b8", kill_on_drop: false }`
[INFO] [stdout] f9fdedaa69c503a90216777faa2688f2abc748345f4dc6e06d0fc063fca441b8