[INFO] cloning repository https://github.com/scaspin/threadsafe-rbt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scaspin/threadsafe-rbt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscaspin%2Fthreadsafe-rbt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscaspin%2Fthreadsafe-rbt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f672d93925c1b4f635cc9667a342a37344e465af
[INFO] testing scaspin/threadsafe-rbt against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscaspin%2Fthreadsafe-rbt" "/workspace/builds/worker-31/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-31/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scaspin/threadsafe-rbt on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scaspin/threadsafe-rbt
[INFO] finished tweaking git repo https://github.com/scaspin/threadsafe-rbt
[INFO] tweaked toml for git repo https://github.com/scaspin/threadsafe-rbt written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate git repo https://github.com/scaspin/threadsafe-rbt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71b7c38535d8b73728edc17077564e021ec64b420f8e601f0fc93afa69569b25
[INFO] running `Command { std: "docker" "start" "-a" "71b7c38535d8b73728edc17077564e021ec64b420f8e601f0fc93afa69569b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71b7c38535d8b73728edc17077564e021ec64b420f8e601f0fc93afa69569b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71b7c38535d8b73728edc17077564e021ec64b420f8e601f0fc93afa69569b25", kill_on_drop: false }`
[INFO] [stdout] 71b7c38535d8b73728edc17077564e021ec64b420f8e601f0fc93afa69569b25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9027d78852e88849841ba9bbaa57c60c0172a1130d657ae9438f68a0fd3e70ad
[INFO] running `Command { std: "docker" "start" "-a" "9027d78852e88849841ba9bbaa57c60c0172a1130d657ae9438f68a0fd3e70ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling threadsafe-rbt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "9027d78852e88849841ba9bbaa57c60c0172a1130d657ae9438f68a0fd3e70ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9027d78852e88849841ba9bbaa57c60c0172a1130d657ae9438f68a0fd3e70ad", kill_on_drop: false }`
[INFO] [stdout] 9027d78852e88849841ba9bbaa57c60c0172a1130d657ae9438f68a0fd3e70ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d6fcc186f29245fc22293099ac631f428d309e5c265003571db30e907dfe7b1
[INFO] running `Command { std: "docker" "start" "-a" "1d6fcc186f29245fc22293099ac631f428d309e5c265003571db30e907dfe7b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling threadsafe-rbt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0596]: cannot borrow data in an `Arc` as mutable
[INFO] [stdout]    --> src/lib.rs:423:21
[INFO] [stdout]     |
[INFO] [stdout] 423 |                     tree_clone.add(i);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout]     |
[INFO] [stdout]     = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Arc<RedBlackTree<usize>>`
[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 E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `threadsafe-rbt` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1d6fcc186f29245fc22293099ac631f428d309e5c265003571db30e907dfe7b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d6fcc186f29245fc22293099ac631f428d309e5c265003571db30e907dfe7b1", kill_on_drop: false }`
[INFO] [stdout] 1d6fcc186f29245fc22293099ac631f428d309e5c265003571db30e907dfe7b1