[INFO] fetching crate rebacdb 0.1.1...
[INFO] testing rebacdb-0.1.1 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate rebacdb 0.1.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate rebacdb 0.1.1
[INFO] finished tweaking crates.io crate rebacdb 0.1.1
[INFO] tweaked toml for crates.io crate rebacdb 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rebacdb 0.1.1 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0091a2377d07fb7189985f0b8eec181491b5d32334a025fb48753a7d1f87eac7
[INFO] running `Command { std: "docker" "start" "-a" "0091a2377d07fb7189985f0b8eec181491b5d32334a025fb48753a7d1f87eac7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0091a2377d07fb7189985f0b8eec181491b5d32334a025fb48753a7d1f87eac7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0091a2377d07fb7189985f0b8eec181491b5d32334a025fb48753a7d1f87eac7", kill_on_drop: false }`
[INFO] [stdout] 0091a2377d07fb7189985f0b8eec181491b5d32334a025fb48753a7d1f87eac7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c0821332144f44e4b8f88be5d9d0c5babde35ebba485f557028218ef4483498
[INFO] running `Command { std: "docker" "start" "-a" "0c0821332144f44e4b8f88be5d9d0c5babde35ebba485f557028218ef4483498", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.51.1
[INFO] [stderr]    Compiling rebacdb v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `VertexIdRef` is never constructed
[INFO] [stdout]   --> src/lib.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct VertexIdRef<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `VertexIdentifier` is never used
[INFO] [stdout]   --> src/lib.rs:62:7
[INFO] [stdout]    |
[INFO] [stdout] 62 | trait VertexIdentifier {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "0c0821332144f44e4b8f88be5d9d0c5babde35ebba485f557028218ef4483498", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c0821332144f44e4b8f88be5d9d0c5babde35ebba485f557028218ef4483498", kill_on_drop: false }`
[INFO] [stdout] 0c0821332144f44e4b8f88be5d9d0c5babde35ebba485f557028218ef4483498
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81d7a457f270f385cb7f02719e3b718a04f814fbf86ec4b8e90860c36c8a18f5
[INFO] running `Command { std: "docker" "start" "-a" "81d7a457f270f385cb7f02719e3b718a04f814fbf86ec4b8e90860c36c8a18f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling rebacdb v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `VertexIdRef` is never constructed
[INFO] [stdout]   --> src/lib.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct VertexIdRef<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `VertexIdentifier` is never used
[INFO] [stdout]   --> src/lib.rs:62:7
[INFO] [stdout]    |
[INFO] [stdout] 62 | trait VertexIdentifier {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find `test` in `tokio`
[INFO] [stdout]  --> src/tests.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[tokio::test]
[INFO] [stdout]   |          ^^^^ could not find `test` in `tokio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find `test` in `tokio`
[INFO] [stdout]   --> src/tests.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[tokio::test]
[INFO] [stdout]    |          ^^^^ could not find `test` in `tokio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rebacdb` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "81d7a457f270f385cb7f02719e3b718a04f814fbf86ec4b8e90860c36c8a18f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81d7a457f270f385cb7f02719e3b718a04f814fbf86ec4b8e90860c36c8a18f5", kill_on_drop: false }`
[INFO] [stdout] 81d7a457f270f385cb7f02719e3b718a04f814fbf86ec4b8e90860c36c8a18f5