[INFO] fetching crate vhost 0.1.0...
[INFO] testing vhost-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate vhost 0.1.0 into /workspace/builds/worker-49/source
[INFO] validating manifest of crates.io crate vhost 0.1.0 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] removed /workspace/builds/worker-49/source/.cargo/config
[INFO] started tweaking crates.io crate vhost 0.1.0
[INFO] finished tweaking crates.io crate vhost 0.1.0
[INFO] tweaked toml for crates.io crate vhost 0.1.0 written to /workspace/builds/worker-49/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 8331305ae53f5b505ba54926ad493defe8150eed6d9ec9a8423f858b03131ab6
[INFO] running `Command { std: "docker" "start" "-a" "8331305ae53f5b505ba54926ad493defe8150eed6d9ec9a8423f858b03131ab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8331305ae53f5b505ba54926ad493defe8150eed6d9ec9a8423f858b03131ab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8331305ae53f5b505ba54926ad493defe8150eed6d9ec9a8423f858b03131ab6", kill_on_drop: false }`
[INFO] [stdout] 8331305ae53f5b505ba54926ad493defe8150eed6d9ec9a8423f858b03131ab6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 09ee0ad9a614f907a806218eea0656c0efe8a4911a2a58ad8ecbffcaeb02dd87
[INFO] running `Command { std: "docker" "start" "-a" "09ee0ad9a614f907a806218eea0656c0efe8a4911a2a58ad8ecbffcaeb02dd87", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling vmm-sys-util v0.8.0
[INFO] [stderr]    Compiling vhost v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "09ee0ad9a614f907a806218eea0656c0efe8a4911a2a58ad8ecbffcaeb02dd87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09ee0ad9a614f907a806218eea0656c0efe8a4911a2a58ad8ecbffcaeb02dd87", kill_on_drop: false }`
[INFO] [stdout] 09ee0ad9a614f907a806218eea0656c0efe8a4911a2a58ad8ecbffcaeb02dd87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 8518de1f95d70e02e6ea0af9de5ecf2444e61b00be67c3546287a440408dbd43
[INFO] running `Command { std: "docker" "start" "-a" "8518de1f95d70e02e6ea0af9de5ecf2444e61b00be67c3546287a440408dbd43", kill_on_drop: false }`
[INFO] [stderr]    Compiling vm-memory v0.6.0
[INFO] [stderr]    Compiling vhost v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `Command { std: "docker" "inspect" "8518de1f95d70e02e6ea0af9de5ecf2444e61b00be67c3546287a440408dbd43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8518de1f95d70e02e6ea0af9de5ecf2444e61b00be67c3546287a440408dbd43", kill_on_drop: false }`
[INFO] [stdout] 8518de1f95d70e02e6ea0af9de5ecf2444e61b00be67c3546287a440408dbd43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 2806b61797e9158d5443eaeeacfdf7b0e9f06d09ca23c9bebb9afae7ddcebf79
[INFO] running `Command { std: "docker" "start" "-a" "2806b61797e9158d5443eaeeacfdf7b0e9f06d09ca23c9bebb9afae7ddcebf79", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.20s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/vhost-c5c1aa5f84b1dd99)
[INFO] [stdout] running 3 tests
[INFO] [stdout] test backend::tests::test_vring_backend_mut ... ok
[INFO] [stdout] test tests::test_error ... ok
[INFO] [stderr]    Doc-tests vhost
[INFO] [stdout] test backend::tests::test_vring_config_data ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[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] running `Command { std: "docker" "inspect" "2806b61797e9158d5443eaeeacfdf7b0e9f06d09ca23c9bebb9afae7ddcebf79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2806b61797e9158d5443eaeeacfdf7b0e9f06d09ca23c9bebb9afae7ddcebf79", kill_on_drop: false }`
[INFO] [stdout] 2806b61797e9158d5443eaeeacfdf7b0e9f06d09ca23c9bebb9afae7ddcebf79