[INFO] cloning repository https://github.com/jakeec/tcr_kata
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/tcr_kata" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Ftcr_kata", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Ftcr_kata'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0226bbd8d043eb31f2922ea2135167cd45ee9e66
[INFO] checking jakeec/tcr_kata against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Ftcr_kata" "/workspace/builds/worker-101/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-101/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakeec/tcr_kata on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jakeec/tcr_kata
[INFO] finished tweaking git repo https://github.com/jakeec/tcr_kata
[INFO] tweaked toml for git repo https://github.com/jakeec/tcr_kata written to /workspace/builds/worker-101/source/Cargo.toml
[INFO] crate git repo https://github.com/jakeec/tcr_kata already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e99381fffd37de7b43d43261e8d980c9d37e9f1ae0a938f3d20f9f6b1bf4b3ef
[INFO] running `Command { std: "docker" "start" "-a" "e99381fffd37de7b43d43261e8d980c9d37e9f1ae0a938f3d20f9f6b1bf4b3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e99381fffd37de7b43d43261e8d980c9d37e9f1ae0a938f3d20f9f6b1bf4b3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99381fffd37de7b43d43261e8d980c9d37e9f1ae0a938f3d20f9f6b1bf4b3ef", kill_on_drop: false }`
[INFO] [stdout] e99381fffd37de7b43d43261e8d980c9d37e9f1ae0a938f3d20f9f6b1bf4b3ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 731bd25173007361c6992e7af9a8774a028f5620cc6bdaebfdd811a705e8dfcd
[INFO] running `Command { std: "docker" "start" "-a" "731bd25173007361c6992e7af9a8774a028f5620cc6bdaebfdd811a705e8dfcd", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.7
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking tcr_kata v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `ArgumentNotValid`
[INFO] [stdout]  --> src/string_adder.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ArgumentNotValid(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_add`
[INFO] [stdout]  --> src/string_adder.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn string_add(a: &str, b: &str) -> Result<String, StringAddError> {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_string_add`
[INFO] [stdout]   --> src/string_adder.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn hex_string_add(a: &str, b: &str) -> Result<String, StringAddError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ArgumentNotValid`
[INFO] [stdout]  --> src/string_adder.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ArgumentNotValid(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `given_0x0F_0x0F_return_145709` should have a snake case name
[INFO] [stdout]    --> src/string_adder.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |         fn given_0x0F_0x0F_return_145709() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `given_0x0_f_0x0_f_return_145709`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.55s
[INFO] running `Command { std: "docker" "inspect" "731bd25173007361c6992e7af9a8774a028f5620cc6bdaebfdd811a705e8dfcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "731bd25173007361c6992e7af9a8774a028f5620cc6bdaebfdd811a705e8dfcd", kill_on_drop: false }`
[INFO] [stdout] 731bd25173007361c6992e7af9a8774a028f5620cc6bdaebfdd811a705e8dfcd