[INFO] cloning repository https://github.com/FauxFaux/testcase-tokio-transaction
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FauxFaux/testcase-tokio-transaction" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Ftestcase-tokio-transaction", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Ftestcase-tokio-transaction'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c924145292edd85da5b27374b16401759e0f7ec
[INFO] testing FauxFaux/testcase-tokio-transaction against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Ftestcase-tokio-transaction" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FauxFaux/testcase-tokio-transaction on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FauxFaux/testcase-tokio-transaction
[INFO] finished tweaking git repo https://github.com/FauxFaux/testcase-tokio-transaction
[INFO] tweaked toml for git repo https://github.com/FauxFaux/testcase-tokio-transaction written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/FauxFaux/testcase-tokio-transaction already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 881c7c2f120108e161c0d1da1874642a9648e46eb910123547e84fb859bba9f2
[INFO] running `Command { std: "docker" "start" "-a" "881c7c2f120108e161c0d1da1874642a9648e46eb910123547e84fb859bba9f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881c7c2f120108e161c0d1da1874642a9648e46eb910123547e84fb859bba9f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "881c7c2f120108e161c0d1da1874642a9648e46eb910123547e84fb859bba9f2", kill_on_drop: false }`
[INFO] [stdout] 881c7c2f120108e161c0d1da1874642a9648e46eb910123547e84fb859bba9f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--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] 331bea1621eecefa8193750f3afcd19d46e8f892fa85186b96df0e4671575176
[INFO] running `Command { std: "docker" "start" "-a" "331bea1621eecefa8193750f3afcd19d46e8f892fa85186b96df0e4671575176", kill_on_drop: false }`
[INFO] [stderr]    Compiling alter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `parent` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |         parent: &mut parent,
[INFO] [stdout]    |                 ----------- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 17 |         tran = Holder {
[INFO] [stdout]    |         ---- first borrow might be used here, when `tran` is dropped and runs the `Drop` code for type `Holder`
[INFO] [stdout] 18 |             parent: &mut parent,
[INFO] [stdout]    |                     ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alter` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "331bea1621eecefa8193750f3afcd19d46e8f892fa85186b96df0e4671575176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "331bea1621eecefa8193750f3afcd19d46e8f892fa85186b96df0e4671575176", kill_on_drop: false }`
[INFO] [stdout] 331bea1621eecefa8193750f3afcd19d46e8f892fa85186b96df0e4671575176