[INFO] cloning repository https://github.com/luciferarm/logchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luciferarm/logchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluciferarm%2Flogchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluciferarm%2Flogchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20bde73567abeecee8094230b316e117f4982f11
[INFO] testing luciferarm/logchain against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluciferarm%2Flogchain" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luciferarm/logchain on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/luciferarm/logchain
[INFO] finished tweaking git repo https://github.com/luciferarm/logchain
[INFO] tweaked toml for git repo https://github.com/luciferarm/logchain written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/luciferarm/logchain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 325245ac1086043ee2411c08964651a8cbecd6c4d47d97c4cb69a651e12b45cf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "325245ac1086043ee2411c08964651a8cbecd6c4d47d97c4cb69a651e12b45cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "325245ac1086043ee2411c08964651a8cbecd6c4d47d97c4cb69a651e12b45cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "325245ac1086043ee2411c08964651a8cbecd6c4d47d97c4cb69a651e12b45cf", kill_on_drop: false }`
[INFO] [stdout] 325245ac1086043ee2411c08964651a8cbecd6c4d47d97c4cb69a651e12b45cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f249c84a69af8d7a92d54aed06746225172857cb7cdcc835c6ef7753f0915f0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8f249c84a69af8d7a92d54aed06746225172857cb7cdcc835c6ef7753f0915f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling block_log v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 97 |         chain.push(create_block(
[INFO] [stdout]    |         ^^^^^ mutable borrow occurs here
[INFO] [stdout] 98 |             *previous_index,
[INFO] [stdout]    |             --------------- immutable borrow later used here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.95s
[INFO] running `Command { std: "docker" "inspect" "8f249c84a69af8d7a92d54aed06746225172857cb7cdcc835c6ef7753f0915f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f249c84a69af8d7a92d54aed06746225172857cb7cdcc835c6ef7753f0915f0", kill_on_drop: false }`
[INFO] [stdout] 8f249c84a69af8d7a92d54aed06746225172857cb7cdcc835c6ef7753f0915f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05381fadb2fd3da6c4e6905d32e29e59dc2db6d28e2d7e71c8eb78ac317a8790
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "05381fadb2fd3da6c4e6905d32e29e59dc2db6d28e2d7e71c8eb78ac317a8790", kill_on_drop: false }`
[INFO] [stderr]    Compiling block_log v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 97 |         chain.push(create_block(
[INFO] [stdout]    |         ^^^^^ mutable borrow occurs here
[INFO] [stdout] 98 |             *previous_index,
[INFO] [stdout]    |             --------------- immutable borrow later used here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "05381fadb2fd3da6c4e6905d32e29e59dc2db6d28e2d7e71c8eb78ac317a8790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05381fadb2fd3da6c4e6905d32e29e59dc2db6d28e2d7e71c8eb78ac317a8790", kill_on_drop: false }`
[INFO] [stdout] 05381fadb2fd3da6c4e6905d32e29e59dc2db6d28e2d7e71c8eb78ac317a8790
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", 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] 8b3ba781905097c51ba80a9c477ffe3865680cb1084bfe48e2b70f725a75b693
[INFO] running `Command { std: "docker" "start" "-a" "8b3ba781905097c51ba80a9c477ffe3865680cb1084bfe48e2b70f725a75b693", kill_on_drop: false }`
[INFO] [stderr] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/main.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stderr]    |                               ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 97 |         chain.push(create_block(
[INFO] [stderr]    |         ^^^^^ mutable borrow occurs here
[INFO] [stderr] 98 |             *previous_index,
[INFO] [stderr]    |             --------------- immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/block_log-c6ed8ab659e78f63)
[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" "8b3ba781905097c51ba80a9c477ffe3865680cb1084bfe48e2b70f725a75b693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b3ba781905097c51ba80a9c477ffe3865680cb1084bfe48e2b70f725a75b693", kill_on_drop: false }`
[INFO] [stdout] 8b3ba781905097c51ba80a9c477ffe3865680cb1084bfe48e2b70f725a75b693