[INFO] cloning repository https://github.com/aconbere/rust-channel-stack-overflow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aconbere/rust-channel-stack-overflow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faconbere%2Frust-channel-stack-overflow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faconbere%2Frust-channel-stack-overflow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbdeb5dc3e385d541572ec0aaea0cd755d45368e
[INFO] testing aconbere/rust-channel-stack-overflow 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%2Faconbere%2Frust-channel-stack-overflow" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aconbere/rust-channel-stack-overflow 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/aconbere/rust-channel-stack-overflow
[INFO] finished tweaking git repo https://github.com/aconbere/rust-channel-stack-overflow
[INFO] tweaked toml for git repo https://github.com/aconbere/rust-channel-stack-overflow written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/aconbere/rust-channel-stack-overflow 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] cc3b829a36fbcdf58aeb8eca91837edb9840ba11b6e3cfaa118aa3c37669a512
[INFO] running `Command { std: "docker" "start" "-a" "cc3b829a36fbcdf58aeb8eca91837edb9840ba11b6e3cfaa118aa3c37669a512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc3b829a36fbcdf58aeb8eca91837edb9840ba11b6e3cfaa118aa3c37669a512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc3b829a36fbcdf58aeb8eca91837edb9840ba11b6e3cfaa118aa3c37669a512", kill_on_drop: false }`
[INFO] [stdout] cc3b829a36fbcdf58aeb8eca91837edb9840ba11b6e3cfaa118aa3c37669a512
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] ec27b9663508e0c543bcb6fabc6f4b57802f01d6d25c2d866efb26b391c28230
[INFO] running `Command { std: "docker" "start" "-a" "ec27b9663508e0c543bcb6fabc6f4b57802f01d6d25c2d866efb26b391c28230", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-overflow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `B`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     B
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `T` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/main.rs:4:10
[INFO] [stdout]    |
[INFO] [stdout] 4  | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "ec27b9663508e0c543bcb6fabc6f4b57802f01d6d25c2d866efb26b391c28230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec27b9663508e0c543bcb6fabc6f4b57802f01d6d25c2d866efb26b391c28230", kill_on_drop: false }`
[INFO] [stdout] ec27b9663508e0c543bcb6fabc6f4b57802f01d6d25c2d866efb26b391c28230
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 493a085cd05c70a8ba7aa2f26ad5504be305aea8d38d9156d4ba10592f90e63f
[INFO] running `Command { std: "docker" "start" "-a" "493a085cd05c70a8ba7aa2f26ad5504be305aea8d38d9156d4ba10592f90e63f", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-overflow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `B`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     B
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `T` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/main.rs:4:10
[INFO] [stdout]    |
[INFO] [stdout] 4  | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.62s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/stack_overflow-e08db2a984dbae91)
[INFO] running `Command { std: "docker" "inspect" "493a085cd05c70a8ba7aa2f26ad5504be305aea8d38d9156d4ba10592f90e63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "493a085cd05c70a8ba7aa2f26ad5504be305aea8d38d9156d4ba10592f90e63f", kill_on_drop: false }`
[INFO] [stdout] 493a085cd05c70a8ba7aa2f26ad5504be305aea8d38d9156d4ba10592f90e63f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 64902992b621eae074c1151ef26bbb30d5df0602b367ee6cd80a538897c84554
[INFO] running `Command { std: "docker" "start" "-a" "64902992b621eae074c1151ef26bbb30d5df0602b367ee6cd80a538897c84554", kill_on_drop: false }`
[INFO] [stderr] warning: variant is never constructed: `B`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     B
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `T` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/main.rs:4:10
[INFO] [stderr]    |
[INFO] [stderr] 4  | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `stack-overflow` (bin "stack-overflow" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/stack_overflow-e08db2a984dbae91)
[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" "64902992b621eae074c1151ef26bbb30d5df0602b367ee6cd80a538897c84554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64902992b621eae074c1151ef26bbb30d5df0602b367ee6cd80a538897c84554", kill_on_drop: false }`
[INFO] [stdout] 64902992b621eae074c1151ef26bbb30d5df0602b367ee6cd80a538897c84554