[INFO] cloning repository https://github.com/kod-kristoff/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kod-kristoff/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkod-kristoff%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkod-kristoff%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5bda6047e1670199cd7db8a9b0e9c10e3dc38a2b
[INFO] testing kod-kristoff/rust-playground against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkod-kristoff%2Frust-playground" "/workspace/builds/worker-47/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-47/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kod-kristoff/rust-playground on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kod-kristoff/rust-playground
[INFO] finished tweaking git repo https://github.com/kod-kristoff/rust-playground
[INFO] tweaked toml for git repo https://github.com/kod-kristoff/rust-playground written to /workspace/builds/worker-47/source/Cargo.toml
[INFO] crate git repo https://github.com/kod-kristoff/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ron v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41a4ce7d06a402a839f39ebc5ae7abfb6058fe280174c4db4c8bd9dd07823312
[INFO] running `Command { std: "docker" "start" "-a" "41a4ce7d06a402a839f39ebc5ae7abfb6058fe280174c4db4c8bd9dd07823312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41a4ce7d06a402a839f39ebc5ae7abfb6058fe280174c4db4c8bd9dd07823312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41a4ce7d06a402a839f39ebc5ae7abfb6058fe280174c4db4c8bd9dd07823312", kill_on_drop: false }`
[INFO] [stdout] 41a4ce7d06a402a839f39ebc5ae7abfb6058fe280174c4db4c8bd9dd07823312
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec54860d3e0194c39a683b574f424cd5ebd78ea954a17a77893aafb2f5a02c72
[INFO] running `Command { std: "docker" "start" "-a" "ec54860d3e0194c39a683b574f424cd5ebd78ea954a17a77893aafb2f5a02c72", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "ec54860d3e0194c39a683b574f424cd5ebd78ea954a17a77893aafb2f5a02c72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec54860d3e0194c39a683b574f424cd5ebd78ea954a17a77893aafb2f5a02c72", kill_on_drop: false }`
[INFO] [stdout] ec54860d3e0194c39a683b574f424cd5ebd78ea954a17a77893aafb2f5a02c72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a50969500a33add17c3040afd8d665575f0a4800d6bc76f253bfefa900c7a23
[INFO] running `Command { std: "docker" "start" "-a" "9a50969500a33add17c3040afd8d665575f0a4800d6bc76f253bfefa900c7a23", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 9.76s
[INFO] running `Command { std: "docker" "inspect" "9a50969500a33add17c3040afd8d665575f0a4800d6bc76f253bfefa900c7a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a50969500a33add17c3040afd8d665575f0a4800d6bc76f253bfefa900c7a23", kill_on_drop: false }`
[INFO] [stdout] 9a50969500a33add17c3040afd8d665575f0a4800d6bc76f253bfefa900c7a23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 35d9fd5bceec40dea231836b242b2c8eac25a3c0a1a35c78e8b0ce6cb3f17f14
[INFO] running `Command { std: "docker" "start" "-a" "35d9fd5bceec40dea231836b242b2c8eac25a3c0a1a35c78e8b0ce6cb3f17f14", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_playground-aa2be53c27fe9d5f)
[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" "35d9fd5bceec40dea231836b242b2c8eac25a3c0a1a35c78e8b0ce6cb3f17f14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35d9fd5bceec40dea231836b242b2c8eac25a3c0a1a35c78e8b0ce6cb3f17f14", kill_on_drop: false }`
[INFO] [stdout] 35d9fd5bceec40dea231836b242b2c8eac25a3c0a1a35c78e8b0ce6cb3f17f14