[INFO] updating cached repository https://github.com/sjmann/rust_quiz
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba945bcb65e3ef430e24aee2b9b7758749e0e656
[INFO] testing sjmann/rust_quiz against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjmann%2Frust_quiz" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjmann/rust_quiz on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sjmann/rust_quiz
[INFO] finished tweaking git repo https://github.com/sjmann/rust_quiz
[INFO] tweaked toml for git repo https://github.com/sjmann/rust_quiz written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/sjmann/rust_quiz already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e1000a4a40eb8b75f7696f549af4378b5d164aee5d7eafc430026a89a9177c54
[INFO] running `"docker" "start" "-a" "e1000a4a40eb8b75f7696f549af4378b5d164aee5d7eafc430026a89a9177c54"`
[INFO] [stderr]    Compiling rust_quiz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `chapter`
[INFO] [stderr]  --> src/io_quiz/question.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     chapter: u8,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "e1000a4a40eb8b75f7696f549af4378b5d164aee5d7eafc430026a89a9177c54"`
[INFO] running `"docker" "rm" "-f" "e1000a4a40eb8b75f7696f549af4378b5d164aee5d7eafc430026a89a9177c54"`
[INFO] [stdout] e1000a4a40eb8b75f7696f549af4378b5d164aee5d7eafc430026a89a9177c54
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e90ce6ca957f4c40826a164962e2b8a3c4ee2de9ffbdc9b0f09eadaa2f76949a
[INFO] running `"docker" "start" "-a" "e90ce6ca957f4c40826a164962e2b8a3c4ee2de9ffbdc9b0f09eadaa2f76949a"`
[INFO] [stderr]    Compiling rust_quiz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `chapter`
[INFO] [stderr]  --> src/io_quiz/question.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     chapter: u8,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "e90ce6ca957f4c40826a164962e2b8a3c4ee2de9ffbdc9b0f09eadaa2f76949a"`
[INFO] running `"docker" "rm" "-f" "e90ce6ca957f4c40826a164962e2b8a3c4ee2de9ffbdc9b0f09eadaa2f76949a"`
[INFO] [stdout] e90ce6ca957f4c40826a164962e2b8a3c4ee2de9ffbdc9b0f09eadaa2f76949a
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5e289c9bc0c3a8f538627bbf598f0de873603a769d08133c8df7acb1f7bf88b7
[INFO] running `"docker" "start" "-a" "5e289c9bc0c3a8f538627bbf598f0de873603a769d08133c8df7acb1f7bf88b7"`
[INFO] [stderr] warning: field is never read: `chapter`
[INFO] [stderr]  --> src/io_quiz/question.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     chapter: u8,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_quiz-c703cf62badf7348
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5e289c9bc0c3a8f538627bbf598f0de873603a769d08133c8df7acb1f7bf88b7"`
[INFO] running `"docker" "rm" "-f" "5e289c9bc0c3a8f538627bbf598f0de873603a769d08133c8df7acb1f7bf88b7"`
[INFO] [stdout] 5e289c9bc0c3a8f538627bbf598f0de873603a769d08133c8df7acb1f7bf88b7