[INFO] cloning repository https://github.com/horou-dsk/algorithm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/horou-dsk/algorithm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhorou-dsk%2Falgorithm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhorou-dsk%2Falgorithm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5995946fc51e6117159076c17c94673469f0aaee
[INFO] checking horou-dsk/algorithm against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhorou-dsk%2Falgorithm" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/horou-dsk/algorithm 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/horou-dsk/algorithm
[INFO] finished tweaking git repo https://github.com/horou-dsk/algorithm
[INFO] tweaked toml for git repo https://github.com/horou-dsk/algorithm written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/horou-dsk/algorithm 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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f83d7cd1aa453255e122f6024d785b266c872f363bb336350a1908673e14bdac
[INFO] running `Command { std: "docker" "start" "-a" "f83d7cd1aa453255e122f6024d785b266c872f363bb336350a1908673e14bdac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f83d7cd1aa453255e122f6024d785b266c872f363bb336350a1908673e14bdac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f83d7cd1aa453255e122f6024d785b266c872f363bb336350a1908673e14bdac", kill_on_drop: false }`
[INFO] [stdout] f83d7cd1aa453255e122f6024d785b266c872f363bb336350a1908673e14bdac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] aa39fd7e5aee075b9f5c9afde8bde39f2d4cdb5028e167f1c0a6aa93089c4161
[INFO] running `Command { std: "docker" "start" "-a" "aa39fd7e5aee075b9f5c9afde8bde39f2d4cdb5028e167f1c0a6aa93089c4161", kill_on_drop: false }`
[INFO] [stderr]     Checking algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `*h` as mutable more than once at a time
[INFO] [stdout]   --> examples/remove_nth_from_end/main.rs:63:18
[INFO] [stdout]    |
[INFO] [stdout] 62 |         prev = unsafe { &mut *h };
[INFO] [stdout]    |                         ------- first mutable borrow occurs here
[INFO] [stdout] 63 |         h = &mut h.as_mut().unwrap().next;
[INFO] [stdout]    |                  ^ second mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 66 |     if let Some(p) = prev.as_mut() {
[INFO] [stdout]    |                      ---- first borrow later used here
[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 E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algorithm` (example "remove_nth_from_end") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "aa39fd7e5aee075b9f5c9afde8bde39f2d4cdb5028e167f1c0a6aa93089c4161", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa39fd7e5aee075b9f5c9afde8bde39f2d4cdb5028e167f1c0a6aa93089c4161", kill_on_drop: false }`
[INFO] [stdout] aa39fd7e5aee075b9f5c9afde8bde39f2d4cdb5028e167f1c0a6aa93089c4161
[INFO] checking horou-dsk/algorithm against try#dae34b759e282c069aa28752564694effd121a63 for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhorou-dsk%2Falgorithm" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/horou-dsk/algorithm 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/horou-dsk/algorithm
[INFO] finished tweaking git repo https://github.com/horou-dsk/algorithm
[INFO] tweaked toml for git repo https://github.com/horou-dsk/algorithm written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/horou-dsk/algorithm 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 229eea8fce662eba43f39e515d385ece2d7122b16f6a2437e177c312bdda70ef
[INFO] running `Command { std: "docker" "start" "-a" "229eea8fce662eba43f39e515d385ece2d7122b16f6a2437e177c312bdda70ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "229eea8fce662eba43f39e515d385ece2d7122b16f6a2437e177c312bdda70ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "229eea8fce662eba43f39e515d385ece2d7122b16f6a2437e177c312bdda70ef", kill_on_drop: false }`
[INFO] [stdout] 229eea8fce662eba43f39e515d385ece2d7122b16f6a2437e177c312bdda70ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7517b7cda56fcc2568ed4008a59db64ba73edceab9ef27480729f75485eb868
[INFO] running `Command { std: "docker" "start" "-a" "f7517b7cda56fcc2568ed4008a59db64ba73edceab9ef27480729f75485eb868", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "f7517b7cda56fcc2568ed4008a59db64ba73edceab9ef27480729f75485eb868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7517b7cda56fcc2568ed4008a59db64ba73edceab9ef27480729f75485eb868", kill_on_drop: false }`
[INFO] [stdout] f7517b7cda56fcc2568ed4008a59db64ba73edceab9ef27480729f75485eb868