[INFO] cloning repository https://github.com/Cancain/rust_arena
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Cancain/rust_arena" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 139f1603368b07ced0078101143c2aafa2854a6a
[INFO] checking Cancain/rust_arena against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_arena on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Cancain/rust_arena
[INFO] finished tweaking git repo https://github.com/Cancain/rust_arena
[INFO] tweaked toml for git repo https://github.com/Cancain/rust_arena written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Cancain/rust_arena already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded autocfg v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72868a82a82d615db678d7ee2ca6ed848e242ab73e1350206737dbffa0aed8c2
[INFO] running `Command { std: "docker" "start" "-a" "72868a82a82d615db678d7ee2ca6ed848e242ab73e1350206737dbffa0aed8c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72868a82a82d615db678d7ee2ca6ed848e242ab73e1350206737dbffa0aed8c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72868a82a82d615db678d7ee2ca6ed848e242ab73e1350206737dbffa0aed8c2", kill_on_drop: false }`
[INFO] [stdout] 72868a82a82d615db678d7ee2ca6ed848e242ab73e1350206737dbffa0aed8c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a127109432a75cd66802db12aeca26edb021314d3b01b3d893a5d29cbed1320
[INFO] running `Command { std: "docker" "start" "-a" "8a127109432a75cd66802db12aeca26edb021314d3b01b3d893a5d29cbed1320", kill_on_drop: false }`
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking rust_arena v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0384]: cannot assign to immutable argument `game_on`
[INFO] [stdout]   --> src/characters.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn start_new_player_character(game_on: bool) -> Character {
[INFO] [stdout]    |                                   ------- help: consider making this binding mutable: `mut game_on`
[INFO] [stdout] ...
[INFO] [stdout] 34 |             "e" | "exit" => game_on = false,
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^ cannot assign to immutable argument
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0384]: cannot assign to immutable argument `game_on`
[INFO] [stdout]   --> src/characters.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn start_new_player_character(game_on: bool) -> Character {
[INFO] [stdout]    |                                   ------- help: consider making this binding mutable: `mut game_on`
[INFO] [stdout] ...
[INFO] [stdout] 34 |             "e" | "exit" => game_on = false,
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^ cannot assign to immutable argument
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_arena` (bin "rust_arena") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rust_arena` (bin "rust_arena" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8a127109432a75cd66802db12aeca26edb021314d3b01b3d893a5d29cbed1320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a127109432a75cd66802db12aeca26edb021314d3b01b3d893a5d29cbed1320", kill_on_drop: false }`
[INFO] [stdout] 8a127109432a75cd66802db12aeca26edb021314d3b01b3d893a5d29cbed1320
[INFO] checking Cancain/rust_arena against try#dae34b759e282c069aa28752564694effd121a63 for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_arena on toolchain dae34b759e282c069aa28752564694effd121a63
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Cancain/rust_arena
[INFO] finished tweaking git repo https://github.com/Cancain/rust_arena
[INFO] tweaked toml for git repo https://github.com/Cancain/rust_arena written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Cancain/rust_arena already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87746bb3de765f8201c21372bae6a1275e3ba43c672719582f5045fdab1d4285
[INFO] running `Command { std: "docker" "start" "-a" "87746bb3de765f8201c21372bae6a1275e3ba43c672719582f5045fdab1d4285", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87746bb3de765f8201c21372bae6a1275e3ba43c672719582f5045fdab1d4285", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87746bb3de765f8201c21372bae6a1275e3ba43c672719582f5045fdab1d4285", kill_on_drop: false }`
[INFO] [stdout] 87746bb3de765f8201c21372bae6a1275e3ba43c672719582f5045fdab1d4285
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b0fe3951cb90419c3b324b07ea468414ee36eadecc7f93b596b2cb9cc2aa8c2
[INFO] running `Command { std: "docker" "start" "-a" "7b0fe3951cb90419c3b324b07ea468414ee36eadecc7f93b596b2cb9cc2aa8c2", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "7b0fe3951cb90419c3b324b07ea468414ee36eadecc7f93b596b2cb9cc2aa8c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0fe3951cb90419c3b324b07ea468414ee36eadecc7f93b596b2cb9cc2aa8c2", kill_on_drop: false }`
[INFO] [stdout] 7b0fe3951cb90419c3b324b07ea468414ee36eadecc7f93b596b2cb9cc2aa8c2