[INFO] cloning repository https://github.com/jhwagner/rust_by_example_solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jhwagner/rust_by_example_solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjhwagner%2Frust_by_example_solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjhwagner%2Frust_by_example_solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0aa32a7b0d6eca03e6ce044479a9b11f80e49c0c
[INFO] testing jhwagner/rust_by_example_solutions against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjhwagner%2Frust_by_example_solutions" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jhwagner/rust_by_example_solutions on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jhwagner/rust_by_example_solutions
[INFO] finished tweaking git repo https://github.com/jhwagner/rust_by_example_solutions
[INFO] tweaked toml for git repo https://github.com/jhwagner/rust_by_example_solutions written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/jhwagner/rust_by_example_solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] affdd17fba42928eaa255330fcf4335a961eae37317064c16f495a38e29535fd
[INFO] running `Command { std: "docker" "start" "-a" "affdd17fba42928eaa255330fcf4335a961eae37317064c16f495a38e29535fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "affdd17fba42928eaa255330fcf4335a961eae37317064c16f495a38e29535fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "affdd17fba42928eaa255330fcf4335a961eae37317064c16f495a38e29535fd", kill_on_drop: false }`
[INFO] [stdout] affdd17fba42928eaa255330fcf4335a961eae37317064c16f495a38e29535fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76f2ce8ebaebecfb9af9f7aaffe68b0fbed9b50672b60b361ab9f80d9807e66f
[INFO] running `Command { std: "docker" "start" "-a" "76f2ce8ebaebecfb9af9f7aaffe68b0fbed9b50672b60b361ab9f80d9807e66f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_by_example_solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Structure`
[INFO] [stdout]   --> src/bin/1_2_0_formatted_print.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     struct Structure(i32);
[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 1.52s
[INFO] running `Command { std: "docker" "inspect" "76f2ce8ebaebecfb9af9f7aaffe68b0fbed9b50672b60b361ab9f80d9807e66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76f2ce8ebaebecfb9af9f7aaffe68b0fbed9b50672b60b361ab9f80d9807e66f", kill_on_drop: false }`
[INFO] [stdout] 76f2ce8ebaebecfb9af9f7aaffe68b0fbed9b50672b60b361ab9f80d9807e66f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85f6a2a3d04f25d87ee665f9563e662476d75f096033db336a827a8aa1d27529
[INFO] running `Command { std: "docker" "start" "-a" "85f6a2a3d04f25d87ee665f9563e662476d75f096033db336a827a8aa1d27529", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_by_example_solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.31s
[INFO] [stderr]   Executable unittests src/bin/1_0_0_hello_world.rs (/opt/rustwide/target/debug/deps/1_0_0_hello_world-bbb4f20624502b57)
[INFO] [stderr]   Executable unittests src/bin/1_2_0_formatted_print.rs (/opt/rustwide/target/debug/deps/1_2_0_formatted_print-40bdedeabfb30dc6)
[INFO] [stderr]   Executable unittests src/bin/1_2_2_display.rs (/opt/rustwide/target/debug/deps/1_2_2_display-fa67fe855c8e7b7c)
[INFO] [stderr]   Executable unittests src/bin/1_2_3_formatting.rs (/opt/rustwide/target/debug/deps/1_2_3_formatting-9a8ccc7bf39c543a)
[INFO] [stderr]   Executable unittests src/bin/2_2_0_tuples.rs (/opt/rustwide/target/debug/deps/2_2_0_tuples-c83629dc7a1cdf40)
[INFO] running `Command { std: "docker" "inspect" "85f6a2a3d04f25d87ee665f9563e662476d75f096033db336a827a8aa1d27529", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85f6a2a3d04f25d87ee665f9563e662476d75f096033db336a827a8aa1d27529", kill_on_drop: false }`
[INFO] [stdout] 85f6a2a3d04f25d87ee665f9563e662476d75f096033db336a827a8aa1d27529
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 930644feef0b08e7fe8b16d2544d074bd796beaa57327e36e65b08403f18208a
[INFO] running `Command { std: "docker" "start" "-a" "930644feef0b08e7fe8b16d2544d074bd796beaa57327e36e65b08403f18208a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/bin/1_0_0_hello_world.rs (/opt/rustwide/target/debug/deps/1_0_0_hello_world-bbb4f20624502b57)
[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/1_2_0_formatted_print.rs (/opt/rustwide/target/debug/deps/1_2_0_formatted_print-40bdedeabfb30dc6)
[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/1_2_2_display.rs (/opt/rustwide/target/debug/deps/1_2_2_display-fa67fe855c8e7b7c)
[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/1_2_3_formatting.rs (/opt/rustwide/target/debug/deps/1_2_3_formatting-9a8ccc7bf39c543a)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/2_2_0_tuples.rs (/opt/rustwide/target/debug/deps/2_2_0_tuples-c83629dc7a1cdf40)
[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] [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" "930644feef0b08e7fe8b16d2544d074bd796beaa57327e36e65b08403f18208a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "930644feef0b08e7fe8b16d2544d074bd796beaa57327e36e65b08403f18208a", kill_on_drop: false }`
[INFO] [stdout] 930644feef0b08e7fe8b16d2544d074bd796beaa57327e36e65b08403f18208a