[INFO] cloning repository https://github.com/katteXu/rust-by-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/katteXu/rust-by-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkatteXu%2Frust-by-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkatteXu%2Frust-by-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 052820f578c20f132951e85303274de7a39f5ba0
[INFO] testing katteXu/rust-by-demo against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkatteXu%2Frust-by-demo" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/katteXu/rust-by-demo on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/katteXu/rust-by-demo
[INFO] finished tweaking git repo https://github.com/katteXu/rust-by-demo
[INFO] tweaked toml for git repo https://github.com/katteXu/rust-by-demo written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/katteXu/rust-by-demo 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9822ce67dae334aa641b38b323ca047d64b256f3cf7be719f1123eef0e05f7ef
[INFO] running `Command { std: "docker" "start" "-a" "9822ce67dae334aa641b38b323ca047d64b256f3cf7be719f1123eef0e05f7ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9822ce67dae334aa641b38b323ca047d64b256f3cf7be719f1123eef0e05f7ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9822ce67dae334aa641b38b323ca047d64b256f3cf7be719f1123eef0e05f7ef", kill_on_drop: false }`
[INFO] [stdout] 9822ce67dae334aa641b38b323ca047d64b256f3cf7be719f1123eef0e05f7ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 992d1d918aa343e0a79d409f5a343db94f7411295ebfddbb6871540ca543f4a8
[INFO] running `Command { std: "docker" "start" "-a" "992d1d918aa343e0a79d409f5a343db94f7411295ebfddbb6871540ca543f4a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v2.0.0
[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 use-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `byte_counter` is never used
[INFO] [stdout]   --> src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn byte_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_counter` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn char_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_sq` is never used
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn num_sq<T: AsMut<u32>>(arg: &mut T) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.07s
[INFO] running `Command { std: "docker" "inspect" "992d1d918aa343e0a79d409f5a343db94f7411295ebfddbb6871540ca543f4a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "992d1d918aa343e0a79d409f5a343db94f7411295ebfddbb6871540ca543f4a8", kill_on_drop: false }`
[INFO] [stdout] 992d1d918aa343e0a79d409f5a343db94f7411295ebfddbb6871540ca543f4a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d77c4399815f9ccb2f86a76874e85ba76940e1ab286b9c527eafe4e3187db5cd
[INFO] running `Command { std: "docker" "start" "-a" "d77c4399815f9ccb2f86a76874e85ba76940e1ab286b9c527eafe4e3187db5cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling use-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `byte_counter` is never used
[INFO] [stdout]   --> src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn byte_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_counter` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn char_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_sq` is never used
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn num_sq<T: AsMut<u32>>(arg: &mut T) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "d77c4399815f9ccb2f86a76874e85ba76940e1ab286b9c527eafe4e3187db5cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d77c4399815f9ccb2f86a76874e85ba76940e1ab286b9c527eafe4e3187db5cd", kill_on_drop: false }`
[INFO] [stdout] d77c4399815f9ccb2f86a76874e85ba76940e1ab286b9c527eafe4e3187db5cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 88cad479dbe72bf6e9006c0184455c7c3f67768ba6436d695cd3ad14e0019140
[INFO] running `Command { std: "docker" "start" "-a" "88cad479dbe72bf6e9006c0184455c7c3f67768ba6436d695cd3ad14e0019140", kill_on_drop: false }`
[INFO] [stderr] warning: function `byte_counter` is never used
[INFO] [stderr]   --> src/main.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn byte_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `char_counter` is never used
[INFO] [stderr]   --> src/main.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn char_counter<T: AsRef<str>>(arg: T) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `num_sq` is never used
[INFO] [stdout] 
[INFO] [stderr]   --> src/main.rs:22:4
[INFO] [stdout] running 5 tests
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn num_sq<T: AsMut<u32>>(arg: &mut T) {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `use-demo` (bin "use-demo") generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/use_demo-78b61437af9f7c6e)
[INFO] [stdout] test tests::different_counts ... ok
[INFO] [stdout] test tests::different_counts_using_string ... ok
[INFO] [stdout] test tests::mult_box ... ok
[INFO] [stdout] test tests::same_counts ... ok
[INFO] [stdout] test tests::same_counts_using_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/my_test.rs (/opt/rustwide/target/debug/deps/my_test-caee663450b8eba4)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test is_odd ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "88cad479dbe72bf6e9006c0184455c7c3f67768ba6436d695cd3ad14e0019140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88cad479dbe72bf6e9006c0184455c7c3f67768ba6436d695cd3ad14e0019140", kill_on_drop: false }`
[INFO] [stdout] 88cad479dbe72bf6e9006c0184455c7c3f67768ba6436d695cd3ad14e0019140