[INFO] cloning repository https://github.com/gatomod/rust_lab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gatomod/rust_lab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgatomod%2Frust_lab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgatomod%2Frust_lab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b285f9007010666c0e868fc47a937d4454df3157
[INFO] checking gatomod/rust_lab against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgatomod%2Frust_lab" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gatomod/rust_lab 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/gatomod/rust_lab
[INFO] finished tweaking git repo https://github.com/gatomod/rust_lab
[INFO] tweaked toml for git repo https://github.com/gatomod/rust_lab written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/gatomod/rust_lab 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d298faf583ca666e6f6111d33b66bc0ca51a252b61ed4fa8a94e469d3f260cc1
[INFO] running `Command { std: "docker" "start" "-a" "d298faf583ca666e6f6111d33b66bc0ca51a252b61ed4fa8a94e469d3f260cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d298faf583ca666e6f6111d33b66bc0ca51a252b61ed4fa8a94e469d3f260cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d298faf583ca666e6f6111d33b66bc0ca51a252b61ed4fa8a94e469d3f260cc1", kill_on_drop: false }`
[INFO] [stdout] d298faf583ca666e6f6111d33b66bc0ca51a252b61ed4fa8a94e469d3f260cc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d81d02636cd53e5d99c32d0fa6a395ff961c1e93813da292c6dc6c57f7e7fa4
[INFO] running `Command { std: "docker" "start" "-a" "8d81d02636cd53e5d99c32d0fa6a395ff961c1e93813da292c6dc6c57f7e7fa4", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking either v1.11.0
[INFO] [stderr]     Checking shannon v0.1.0 (/opt/rustwide/workdir/shannon)
[INFO] [stderr]     Checking custom_array v0.1.0 (/opt/rustwide/workdir/custom_array)
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rayon-core v1.12.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir/huffman)
[INFO] [stdout] error[E0368]: binary assignment operation `+=` cannot be applied to type `Box<u32>`
[INFO] [stdout]   --> huffman/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             *v += 1
[INFO] [stdout]    |             --^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             cannot use `+=` on type `Box<u32>`
[INFO] [stdout]    |
[INFO] [stdout] help: `+=` can be used on `u32` if you dereference the left-hand side
[INFO] [stdout]    |
[INFO] [stdout] 69 |             **v += 1
[INFO] [stdout]    |             +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0368]: binary assignment operation `+=` cannot be applied to type `Box<u32>`
[INFO] [stdout]   --> huffman/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             *v += 1
[INFO] [stdout]    |             --^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             cannot use `+=` on type `Box<u32>`
[INFO] [stdout]    |
[INFO] [stdout] help: `+=` can be used on `u32` if you dereference the left-hand side
[INFO] [stdout]    |
[INFO] [stdout] 69 |             **v += 1
[INFO] [stdout]    |             +
[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 E0368`.
[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 E0368`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `huffman` (bin "huffman") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `huffman` (bin "huffman" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8d81d02636cd53e5d99c32d0fa6a395ff961c1e93813da292c6dc6c57f7e7fa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d81d02636cd53e5d99c32d0fa6a395ff961c1e93813da292c6dc6c57f7e7fa4", kill_on_drop: false }`
[INFO] [stdout] 8d81d02636cd53e5d99c32d0fa6a395ff961c1e93813da292c6dc6c57f7e7fa4