[INFO] cloning repository https://github.com/bpeel/vaflo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bpeel/vaflo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpeel%2Fvaflo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpeel%2Fvaflo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 773d773f427ee173f465925c66d8416945dd9cd1
[INFO] checking bpeel/vaflo against master#6f40082313d8374bdf962aba943a712d5322fae6 for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpeel%2Fvaflo" "/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/bpeel/vaflo on toolchain 6f40082313d8374bdf962aba943a712d5322fae6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6f40082313d8374bdf962aba943a712d5322fae6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bpeel/vaflo
[INFO] finished tweaking git repo https://github.com/bpeel/vaflo
[INFO] tweaked toml for git repo https://github.com/bpeel/vaflo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bpeel/vaflo 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" "+6f40082313d8374bdf962aba943a712d5322fae6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking bpeel/vaflo against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpeel%2Fvaflo" "/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/bpeel/vaflo on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bpeel/vaflo
[INFO] finished tweaking git repo https://github.com/bpeel/vaflo
[INFO] tweaked toml for git repo https://github.com/bpeel/vaflo written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bpeel/vaflo 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" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking bpeel/vaflo against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpeel%2Fvaflo" "/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/bpeel/vaflo on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bpeel/vaflo
[INFO] finished tweaking git repo https://github.com/bpeel/vaflo
[INFO] tweaked toml for git repo https://github.com/bpeel/vaflo written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bpeel/vaflo 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" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gettext-rs v0.7.0
[INFO] [stderr]   Downloaded temp-dir v0.1.11
[INFO] [stderr]   Downloaded ncurses v5.101.0
[INFO] [stderr]   Downloaded locale_config v0.3.0
[INFO] [stderr]   Downloaded gettext-sys v0.21.3
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f07a20d21f8c89e10e1f9b55f6a50971067444e6824bcf582f155ba58df8ba46
[INFO] running `Command { std: "docker" "start" "-a" "f07a20d21f8c89e10e1f9b55f6a50971067444e6824bcf582f155ba58df8ba46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f07a20d21f8c89e10e1f9b55f6a50971067444e6824bcf582f155ba58df8ba46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f07a20d21f8c89e10e1f9b55f6a50971067444e6824bcf582f155ba58df8ba46", kill_on_drop: false }`
[INFO] [stdout] f07a20d21f8c89e10e1f9b55f6a50971067444e6824bcf582f155ba58df8ba46
[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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 600d4c27ec688bfd9c3957968f65ddb629392a78d8dfbdcd36b1869bff91f0a5
[INFO] running `Command { std: "docker" "start" "-a" "600d4c27ec688bfd9c3957968f65ddb629392a78d8dfbdcd36b1869bff91f0a5", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]    Compiling temp-dir v0.1.11
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]    Compiling gettext-sys v0.21.3
[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 chrono v0.4.31
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]     Checking locale_config v0.3.0
[INFO] [stderr]     Checking gettext-rs v0.7.0
[INFO] [stderr]     Checking vaflo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `contains` is never used
[INFO] [stdout]   --> src/dictionary.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Dictionary {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn contains<I: Iterator<Item = char>>(&self, word: I) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `N_SPACING_LETTERS` is never used
[INFO] [stdout]   --> src/grid.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub const N_SPACING_LETTERS: usize = WORD_LENGTH - N_WORDS_ON_AXIS;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `N_LETTERS` is never used
[INFO] [stdout]   --> src/grid.rs:23:11
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub const N_LETTERS: usize =
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]    --> src/grid.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 90  | impl PuzzleGrid {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StackEntry` is never constructed
[INFO] [stdout]    --> src/dictionary.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | struct StackEntry<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordIterator` is never constructed
[INFO] [stdout]    --> src/dictionary.rs:126:12
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub struct WordIterator<'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `next` are never used
[INFO] [stdout]    --> src/dictionary.rs:132:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<'a> WordIterator<'a> {
[INFO] [stdout]     | ------------------------- associated items in this implementation
[INFO] [stdout] 132 |     pub fn new(dictionary: &'a Dictionary) -> WordIterator<'a> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     pub fn next(&mut self) -> Option<&str> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]    --> src/grid.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 90  | impl PuzzleGrid {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StackEntry` is never constructed
[INFO] [stdout]    --> src/dictionary.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | struct StackEntry<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordIterator` is never constructed
[INFO] [stdout]    --> src/dictionary.rs:126:12
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub struct WordIterator<'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `next` are never used
[INFO] [stdout]    --> src/dictionary.rs:132:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<'a> WordIterator<'a> {
[INFO] [stdout]     | ------------------------- associated items in this implementation
[INFO] [stdout] 132 |     pub fn new(dictionary: &'a Dictionary) -> WordIterator<'a> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     pub fn next(&mut self) -> Option<&str> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]    --> src/grid.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 90  | impl PuzzleGrid {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_grid` is never used
[INFO] [stdout]    --> src/letter_grid.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl LetterGrid {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 151 |     pub fn from_grid(grid: &grid::Grid) -> Result<LetterGrid, ParseError> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]    --> src/grid.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 90  | impl PuzzleGrid {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 112 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 40s
[INFO] running `Command { std: "docker" "inspect" "600d4c27ec688bfd9c3957968f65ddb629392a78d8dfbdcd36b1869bff91f0a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "600d4c27ec688bfd9c3957968f65ddb629392a78d8dfbdcd36b1869bff91f0a5", kill_on_drop: false }`
[INFO] [stdout] 600d4c27ec688bfd9c3957968f65ddb629392a78d8dfbdcd36b1869bff91f0a5