[INFO] fetching crate synchronized-writer 1.1.10...
[INFO] testing synchronized-writer-1.1.10 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate synchronized-writer 1.1.10 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate synchronized-writer 1.1.10 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synchronized-writer 1.1.10
[INFO] finished tweaking crates.io crate synchronized-writer 1.1.10
[INFO] tweaked toml for crates.io crate synchronized-writer 1.1.10 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b4a9a46edf35d6d4dc9949351ae58b5ff0040a44cfd1d781a304966707fc99f
[INFO] running `Command { std: "docker" "start" "-a" "7b4a9a46edf35d6d4dc9949351ae58b5ff0040a44cfd1d781a304966707fc99f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b4a9a46edf35d6d4dc9949351ae58b5ff0040a44cfd1d781a304966707fc99f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b4a9a46edf35d6d4dc9949351ae58b5ff0040a44cfd1d781a304966707fc99f", kill_on_drop: false }`
[INFO] [stdout] 7b4a9a46edf35d6d4dc9949351ae58b5ff0040a44cfd1d781a304966707fc99f
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8417a6ea131fc30521a2bbf9844004c093a44679dd62af998ffba2fc34e818d5
[INFO] running `Command { std: "docker" "start" "-a" "8417a6ea131fc30521a2bbf9844004c093a44679dd62af998ffba2fc34e818d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling synchronized-writer v1.1.10 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "8417a6ea131fc30521a2bbf9844004c093a44679dd62af998ffba2fc34e818d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8417a6ea131fc30521a2bbf9844004c093a44679dd62af998ffba2fc34e818d5", kill_on_drop: false }`
[INFO] [stdout] 8417a6ea131fc30521a2bbf9844004c093a44679dd62af998ffba2fc34e818d5
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0c9a185feb9cab0f9c5d6feb23c36cf682b4f3722db5bdc9a0d9698dd00a9f5
[INFO] running `Command { std: "docker" "start" "-a" "e0c9a185feb9cab0f9c5d6feb23c36cf682b4f3722db5bdc9a0d9698dd00a9f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling synchronized-writer v1.1.10 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "e0c9a185feb9cab0f9c5d6feb23c36cf682b4f3722db5bdc9a0d9698dd00a9f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c9a185feb9cab0f9c5d6feb23c36cf682b4f3722db5bdc9a0d9698dd00a9f5", kill_on_drop: false }`
[INFO] [stdout] e0c9a185feb9cab0f9c5d6feb23c36cf682b4f3722db5bdc9a0d9698dd00a9f5
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 344114e1ed301f3f9a68c75085003297797242df0f4a60608fbedf2f3b8a2760
[INFO] running `Command { std: "docker" "start" "-a" "344114e1ed301f3f9a68c75085003297797242df0f4a60608fbedf2f3b8a2760", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/synchronized_writer-1e3bc637d97c9d42)
[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; finished in 0.00s
[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; finished in 0.46s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "344114e1ed301f3f9a68c75085003297797242df0f4a60608fbedf2f3b8a2760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "344114e1ed301f3f9a68c75085003297797242df0f4a60608fbedf2f3b8a2760", kill_on_drop: false }`
[INFO] [stdout] 344114e1ed301f3f9a68c75085003297797242df0f4a60608fbedf2f3b8a2760