[INFO] cloning repository https://github.com/finnegantdewitt/graphs-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/finnegantdewitt/graphs-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffinnegantdewitt%2Fgraphs-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffinnegantdewitt%2Fgraphs-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 119255b8c941f95ffe418a103e068b8025b4aa79
[INFO] checking finnegantdewitt/graphs-rust against master#18a029cfe8e761533634bda8fe8a14e30280a21b for pr-139646
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffinnegantdewitt%2Fgraphs-rust" "/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/finnegantdewitt/graphs-rust on toolchain 18a029cfe8e761533634bda8fe8a14e30280a21b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/finnegantdewitt/graphs-rust
[INFO] finished tweaking git repo https://github.com/finnegantdewitt/graphs-rust
[INFO] tweaked toml for git repo https://github.com/finnegantdewitt/graphs-rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/finnegantdewitt/graphs-rust 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" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd335f68669a5fdba08f958af50844a589ba9e6556bf46ec0458c1d3e678f5fb
[INFO] running `Command { std: "docker" "start" "-a" "bd335f68669a5fdba08f958af50844a589ba9e6556bf46ec0458c1d3e678f5fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd335f68669a5fdba08f958af50844a589ba9e6556bf46ec0458c1d3e678f5fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd335f68669a5fdba08f958af50844a589ba9e6556bf46ec0458c1d3e678f5fb", kill_on_drop: false }`
[INFO] [stdout] bd335f68669a5fdba08f958af50844a589ba9e6556bf46ec0458c1d3e678f5fb
[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=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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c201bf4d681f98eb0f65eea8254ea4d7b830a579d2ceb7f7aad47c8a5fa0bfde
[INFO] running `Command { std: "docker" "start" "-a" "c201bf4d681f98eb0f65eea8254ea4d7b830a579d2ceb7f7aad47c8a5fa0bfde", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking graphs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/opt_maze.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/opt_maze.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> src/opt_maze.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::current`
[INFO] [stdout]  --> src/opt_maze.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread::current;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> src/opt_maze.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::current`
[INFO] [stdout]  --> src/opt_maze.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread::current;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::graph::*`
[INFO] [stdout]    --> src/lib.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 119 |     use super::graph::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/opt_maze.rs:311:14
[INFO] [stdout]     |
[INFO] [stdout] 311 |         for (from, edge_vec) in self.graph.edges.iter() {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_buffer_greyscale`
[INFO] [stdout]    --> src/opt_maze.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 285 |         is_buffer_greyscale: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_buffer_greyscale`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `start` and `end` are never read
[INFO] [stdout]   --> src/opt_maze.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct OptMaze {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     start: RefNode,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     end: RefNode,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `convert_greyscale_buf_to_rgb` is never used
[INFO] [stdout]   --> src/opt_maze.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn convert_greyscale_buf_to_rgb(image_buffer: &mut Vec<u8>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/opt_maze.rs:311:14
[INFO] [stdout]     |
[INFO] [stdout] 311 |         for (from, edge_vec) in self.graph.edges.iter() {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_buffer_greyscale`
[INFO] [stdout]    --> src/opt_maze.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 285 |         is_buffer_greyscale: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_buffer_greyscale`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::BufWriter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `start` and `end` are never read
[INFO] [stdout]   --> src/opt_maze.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct OptMaze {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     start: RefNode,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     end: RefNode,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for i in 0..runs {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `naive_maze`
[INFO] [stdout]   --> src/main.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut naive_maze = Maze::from(&buf, width, height, is_greyscale);
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_naive_maze`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `graphs` (lib test); 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/18a029cfe8e761533634bda8fe8a14e30280a21b/bin/rustc --crate-name lib --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=770ac934e2661fbd -C extra-filename=-fe8aceaa11119711 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern png=/opt/rustwide/target/debug/deps/libpng-fbddf4e39117b04d.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `graphs` (bin "graphs"); 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/18a029cfe8e761533634bda8fe8a14e30280a21b/bin/rustc --crate-name graphs --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=c5c236b736fa0a9e -C extra-filename=-949b7dca7ac41902 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern lib=/opt/rustwide/target/debug/deps/liblib-14c23ce62e568b11.rmeta --extern png=/opt/rustwide/target/debug/deps/libpng-fbddf4e39117b04d.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] error: could not compile `graphs` (bin "graphs" test); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/18a029cfe8e761533634bda8fe8a14e30280a21b/bin/rustc --crate-name graphs --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=60bc3a6601f8c747 -C extra-filename=-6cecc5990936e323 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern lib=/opt/rustwide/target/debug/deps/liblib-14c23ce62e568b11.rmeta --extern png=/opt/rustwide/target/debug/deps/libpng-fbddf4e39117b04d.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c201bf4d681f98eb0f65eea8254ea4d7b830a579d2ceb7f7aad47c8a5fa0bfde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c201bf4d681f98eb0f65eea8254ea4d7b830a579d2ceb7f7aad47c8a5fa0bfde", kill_on_drop: false }`
[INFO] [stdout] c201bf4d681f98eb0f65eea8254ea4d7b830a579d2ceb7f7aad47c8a5fa0bfde