[INFO] cloning repository https://github.com/maxsmoke/advent2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maxsmoke/advent2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 550028178a24e55a8007c7d2b0d38d7e40d66b35
[INFO] testing maxsmoke/advent2019 against try#a7ee93192a766fb0dafa23def7154fc03cfcfc3e for pr-146989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] finished tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] tweaked toml for git repo https://github.com/maxsmoke/advent2019 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maxsmoke/advent2019 on toolchain a7ee93192a766fb0dafa23def7154fc03cfcfc3e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/maxsmoke/advent2019 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" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing maxsmoke/advent2019 against try#a7ee93192a766fb0dafa23def7154fc03cfcfc3e for pr-146989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] finished tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] tweaked toml for git repo https://github.com/maxsmoke/advent2019 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maxsmoke/advent2019 on toolchain a7ee93192a766fb0dafa23def7154fc03cfcfc3e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/maxsmoke/advent2019 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" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "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] 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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61b5b9be8ff8b906ed5f2cdd29ddef07b8bdabad59d5516ffe777d2d8a4b914a
[INFO] running `Command { std: "docker" "start" "-a" "61b5b9be8ff8b906ed5f2cdd29ddef07b8bdabad59d5516ffe777d2d8a4b914a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61b5b9be8ff8b906ed5f2cdd29ddef07b8bdabad59d5516ffe777d2d8a4b914a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61b5b9be8ff8b906ed5f2cdd29ddef07b8bdabad59d5516ffe777d2d8a4b914a", kill_on_drop: false }`
[INFO] [stdout] 61b5b9be8ff8b906ed5f2cdd29ddef07b8bdabad59d5516ffe777d2d8a4b914a
[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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff5737765477bf138f39e177b751591941ee93e763b8a4546f28b3884efa5297
[INFO] running `Command { std: "docker" "start" "-a" "ff5737765477bf138f39e177b751591941ee93e763b8a4546f28b3884efa5297", kill_on_drop: false }`
[INFO] [stderr]    Compiling advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]   --> src/problems/d4p2.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let low = 353_096;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high`
[INFO] [stdout]   --> src/problems/d4p2.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let high = 843_212;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_high`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `descends` is never used
[INFO] [stdout]   --> src/problems/d4p2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn descends(digits: Vec<u8>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/utils/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         &instruction.push(dir);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = &instruction.push(dir);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "ff5737765477bf138f39e177b751591941ee93e763b8a4546f28b3884efa5297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff5737765477bf138f39e177b751591941ee93e763b8a4546f28b3884efa5297", kill_on_drop: false }`
[INFO] [stdout] ff5737765477bf138f39e177b751591941ee93e763b8a4546f28b3884efa5297
[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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96bf075f376e5c6d7b3c8c02ba6237e6138d1deb04395ea06ef3bf471e28e8d6
[INFO] running `Command { std: "docker" "start" "-a" "96bf075f376e5c6d7b3c8c02ba6237e6138d1deb04395ea06ef3bf471e28e8d6", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]   --> src/problems/d4p2.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let low = 353_096;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high`
[INFO] [stdout]   --> src/problems/d4p2.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let high = 843_212;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_high`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `descends` is never used
[INFO] [stdout]   --> src/problems/d4p2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn descends(digits: Vec<u8>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/utils/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         &instruction.push(dir);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = &instruction.push(dir);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]   --> src/problems/d4p2.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let low = 353_096;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high`
[INFO] [stdout]   --> src/problems/d4p2.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let high = 843_212;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_high`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `descends` is never used
[INFO] [stdout]   --> src/problems/d4p2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn descends(digits: Vec<u8>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/utils/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         &instruction.push(dir);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = &instruction.push(dir);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "96bf075f376e5c6d7b3c8c02ba6237e6138d1deb04395ea06ef3bf471e28e8d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96bf075f376e5c6d7b3c8c02ba6237e6138d1deb04395ea06ef3bf471e28e8d6", kill_on_drop: false }`
[INFO] [stdout] 96bf075f376e5c6d7b3c8c02ba6237e6138d1deb04395ea06ef3bf471e28e8d6
[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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 09f30f5d345beb34ed04a567ac466aacaf927aa60d532ab5e3290f437f857eff
[INFO] running `Command { std: "docker" "start" "-a" "09f30f5d345beb34ed04a567ac466aacaf927aa60d532ab5e3290f437f857eff", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `low`
[INFO] [stderr]   --> src/problems/d4p2.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let low = 353_096;
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `high`
[INFO] [stderr]   --> src/problems/d4p2.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let high = 843_212;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_high`
[INFO] [stderr] 
[INFO] [stderr] warning: function `descends` is never used
[INFO] [stderr]   --> src/problems/d4p2.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn descends(digits: Vec<u8>) -> bool {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/utils/mod.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         &instruction.push(dir);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let _ = &instruction.push(dir);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `advent` (lib) generated 4 warnings (run `cargo fix --lib -p advent` to apply 2 suggestions)
[INFO] [stderr] warning: `advent` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/advent-4d3b642f881d9db1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/main.rs (/opt/rustwide/target/debug/deps/main-21babf78169db8ca)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests advent
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "09f30f5d345beb34ed04a567ac466aacaf927aa60d532ab5e3290f437f857eff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f30f5d345beb34ed04a567ac466aacaf927aa60d532ab5e3290f437f857eff", kill_on_drop: false }`
[INFO] [stdout] 09f30f5d345beb34ed04a567ac466aacaf927aa60d532ab5e3290f437f857eff