[INFO] cloning repository https://github.com/martijnfolmer/SudokuCreator_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/martijnfolmer/SudokuCreator_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartijnfolmer%2FSudokuCreator_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartijnfolmer%2FSudokuCreator_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98cc49ad5600722dffbfded9d13549a88afa777d
[INFO] building martijnfolmer/SudokuCreator_Rust against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartijnfolmer%2FSudokuCreator_Rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/martijnfolmer/SudokuCreator_Rust on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/martijnfolmer/SudokuCreator_Rust
[INFO] finished tweaking git repo https://github.com/martijnfolmer/SudokuCreator_Rust
[INFO] tweaked toml for git repo https://github.com/martijnfolmer/SudokuCreator_Rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/martijnfolmer/SudokuCreator_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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0de1a5b48e4e8dddcba10de4f4c1b58f6d9491d375ff558273d139648c610085
[INFO] running `Command { std: "docker" "start" "-a" "0de1a5b48e4e8dddcba10de4f4c1b58f6d9491d375ff558273d139648c610085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0de1a5b48e4e8dddcba10de4f4c1b58f6d9491d375ff558273d139648c610085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0de1a5b48e4e8dddcba10de4f4c1b58f6d9491d375ff558273d139648c610085", kill_on_drop: false }`
[INFO] [stdout] 0de1a5b48e4e8dddcba10de4f4c1b58f6d9491d375ff558273d139648c610085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8c8e543ff36ecce3c6a1d53cb8b5b452624c35c546c4c175bbc6d5e9fa704ad
[INFO] running `Command { std: "docker" "start" "-a" "b8c8e543ff36ecce3c6a1d53cb8b5b452624c35c546c4c175bbc6d5e9fa704ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling sudoku_creator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `old_val` is never read
[INFO] [stdout]    --> src/main.rs:692:17
[INFO] [stdout]     |
[INFO] [stdout] 692 |         let mut old_val = 0;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `xco` is never read
[INFO] [stdout]    --> src/main.rs:693:17
[INFO] [stdout]     |
[INFO] [stdout] 693 |         let mut xco = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `yco` is never read
[INFO] [stdout]    --> src/main.rs:694:17
[INFO] [stdout]     |
[INFO] [stdout] 694 |         let mut yco = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.14s
[INFO] running `Command { std: "docker" "inspect" "b8c8e543ff36ecce3c6a1d53cb8b5b452624c35c546c4c175bbc6d5e9fa704ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8c8e543ff36ecce3c6a1d53cb8b5b452624c35c546c4c175bbc6d5e9fa704ad", kill_on_drop: false }`
[INFO] [stdout] b8c8e543ff36ecce3c6a1d53cb8b5b452624c35c546c4c175bbc6d5e9fa704ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 398a38470b65abcd81c2f673f062cf5d0d5de9b7db9e0faaa845c015d45ff5f4
[INFO] running `Command { std: "docker" "start" "-a" "398a38470b65abcd81c2f673f062cf5d0d5de9b7db9e0faaa845c015d45ff5f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku_creator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `old_val` is never read
[INFO] [stdout]    --> src/main.rs:692:17
[INFO] [stdout]     |
[INFO] [stdout] 692 |         let mut old_val = 0;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `xco` is never read
[INFO] [stdout]    --> src/main.rs:693:17
[INFO] [stdout]     |
[INFO] [stdout] 693 |         let mut xco = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `yco` is never read
[INFO] [stdout]    --> src/main.rs:694:17
[INFO] [stdout]     |
[INFO] [stdout] 694 |         let mut yco = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "398a38470b65abcd81c2f673f062cf5d0d5de9b7db9e0faaa845c015d45ff5f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "398a38470b65abcd81c2f673f062cf5d0d5de9b7db9e0faaa845c015d45ff5f4", kill_on_drop: false }`
[INFO] [stdout] 398a38470b65abcd81c2f673f062cf5d0d5de9b7db9e0faaa845c015d45ff5f4