[INFO] cloning repository https://github.com/kaitokido/logchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kaitokido/logchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28e4f425e590db586945599a56764fac4b9e4c28
[INFO] checking kaitokido/logchain against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kaitokido/logchain on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kaitokido/logchain
[INFO] finished tweaking git repo https://github.com/kaitokido/logchain
[INFO] tweaked toml for git repo https://github.com/kaitokido/logchain written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/kaitokido/logchain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 31b45b0bd01d24cb0b273749a079bfdab02a261de93b89b662b5078ff5c4499c
[INFO] running `Command { std: "docker" "start" "-a" "31b45b0bd01d24cb0b273749a079bfdab02a261de93b89b662b5078ff5c4499c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31b45b0bd01d24cb0b273749a079bfdab02a261de93b89b662b5078ff5c4499c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31b45b0bd01d24cb0b273749a079bfdab02a261de93b89b662b5078ff5c4499c", kill_on_drop: false }`
[INFO] [stdout] 31b45b0bd01d24cb0b273749a079bfdab02a261de93b89b662b5078ff5c4499c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea55c1d8f611fb046e62ce950239d1a8f0887dc6d706ba1a0d673332970ea44d
[INFO] running `Command { std: "docker" "start" "-a" "ea55c1d8f611fb046e62ce950239d1a8f0887dc6d706ba1a0d673332970ea44d", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking blake2 v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking block_log v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[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] [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 32.12s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking block_log v0.1.0 (/tmp/fixit)
[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: 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "ea55c1d8f611fb046e62ce950239d1a8f0887dc6d706ba1a0d673332970ea44d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea55c1d8f611fb046e62ce950239d1a8f0887dc6d706ba1a0d673332970ea44d", kill_on_drop: false }`
[INFO] [stdout] ea55c1d8f611fb046e62ce950239d1a8f0887dc6d706ba1a0d673332970ea44d