[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator/branches/: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 2)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 3)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 4)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 5)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 6)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 7)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 8)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 9)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 10)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 11)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 12)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 13)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 14)
[INFO] cloning repository https://github.com/gmlewis/maze-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gmlewis/maze-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72e957ee75827dabf39627d2ccc8f589939e5270
[INFO] checking gmlewis/maze-generator against try#5fee451ebd94296ea05214e819c311e164b30af6 for pr-139042
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgmlewis%2Fmaze-generator" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gmlewis/maze-generator on toolchain 5fee451ebd94296ea05214e819c311e164b30af6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gmlewis/maze-generator
[INFO] finished tweaking git repo https://github.com/gmlewis/maze-generator
[INFO] tweaked toml for git repo https://github.com/gmlewis/maze-generator written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gmlewis/maze-generator 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" "+5fee451ebd94296ea05214e819c311e164b30af6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19168dfe0e43b4968a575ea5f911a22cfc1a0d3c9858e57e07b4209ea76f14dc
[INFO] running `Command { std: "docker" "start" "-a" "19168dfe0e43b4968a575ea5f911a22cfc1a0d3c9858e57e07b4209ea76f14dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19168dfe0e43b4968a575ea5f911a22cfc1a0d3c9858e57e07b4209ea76f14dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19168dfe0e43b4968a575ea5f911a22cfc1a0d3c9858e57e07b4209ea76f14dc", kill_on_drop: false }`
[INFO] [stdout] 19168dfe0e43b4968a575ea5f911a22cfc1a0d3c9858e57e07b4209ea76f14dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f883b23ffccf1a69fe5e5521653cb201cb6fb9863b522b5a8c516afae38c32aa
[INFO] running `Command { std: "docker" "start" "-a" "f883b23ffccf1a69fe5e5521653cb201cb6fb9863b522b5a8c516afae38c32aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking ttf-parser v0.15.2
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.8
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking owned_ttf_parser v0.15.2
[INFO] [stderr]     Checking rusttype v0.9.3
[INFO] [stderr]     Checking maze-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: a value of type `Vec<&mut T>` cannot be built from an iterator over elements of type `&T`
[INFO] [stdout]   --> src/maze/backtracker.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |             .collect();
[INFO] [stdout]    |              ^^^^^^^ value of type `Vec<&mut T>` cannot be built from `std::iter::Iterator<Item=&T>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<&_>` is not implemented for `Vec<&mut T>`
[INFO] [stdout]            but trait `FromIterator<&mut _>` is implemented for it
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/5fee451ebd94296ea05214e819c311e164b30af6/library/core/src/iter/traits/iterator.rs:1972:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a value of type `Vec<&mut T>` cannot be built from an iterator over elements of type `&T`
[INFO] [stdout]   --> src/maze/backtracker.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |             .collect();
[INFO] [stdout]    |              ^^^^^^^ value of type `Vec<&mut T>` cannot be built from `std::iter::Iterator<Item=&T>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<&_>` is not implemented for `Vec<&mut T>`
[INFO] [stdout]            but trait `FromIterator<&mut _>` is implemented for it
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/5fee451ebd94296ea05214e819c311e164b30af6/library/core/src/iter/traits/iterator.rs:1972:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maze-generator` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maze-generator` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f883b23ffccf1a69fe5e5521653cb201cb6fb9863b522b5a8c516afae38c32aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f883b23ffccf1a69fe5e5521653cb201cb6fb9863b522b5a8c516afae38c32aa", kill_on_drop: false }`
[INFO] [stdout] f883b23ffccf1a69fe5e5521653cb201cb6fb9863b522b5a8c516afae38c32aa