[INFO] fetching crate quickbacktrack 0.7.0...
[INFO] testing quickbacktrack-0.7.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate quickbacktrack 0.7.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate quickbacktrack 0.7.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quickbacktrack 0.7.0
[INFO] finished tweaking crates.io crate quickbacktrack 0.7.0
[INFO] tweaked toml for crates.io crate quickbacktrack 0.7.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate quickbacktrack 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fnv v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70b6c04de5ba898c10c79f71a4ffe7d4ebe00e49e4d34d7542a75525373b5763
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "70b6c04de5ba898c10c79f71a4ffe7d4ebe00e49e4d34d7542a75525373b5763", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70b6c04de5ba898c10c79f71a4ffe7d4ebe00e49e4d34d7542a75525373b5763", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70b6c04de5ba898c10c79f71a4ffe7d4ebe00e49e4d34d7542a75525373b5763", kill_on_drop: false }`
[INFO] [stdout] 70b6c04de5ba898c10c79f71a4ffe7d4ebe00e49e4d34d7542a75525373b5763
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 25bff43c4b7f2d2a41632deed2065f431d62eb053016af156520d4462500d87e
[INFO] running `Command { std: "docker" "start" "-a" "25bff43c4b7f2d2a41632deed2065f431d62eb053016af156520d4462500d87e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling quickbacktrack v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.72s
[INFO] running `Command { std: "docker" "inspect" "25bff43c4b7f2d2a41632deed2065f431d62eb053016af156520d4462500d87e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25bff43c4b7f2d2a41632deed2065f431d62eb053016af156520d4462500d87e", kill_on_drop: false }`
[INFO] [stdout] 25bff43c4b7f2d2a41632deed2065f431d62eb053016af156520d4462500d87e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebaa8142e60d915ed6b845dc112bf5530477b4e75e5ef2b7d8b9300408bceccf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ebaa8142e60d915ed6b845dc112bf5530477b4e75e5ef2b7d8b9300408bceccf", kill_on_drop: false }`
[INFO] [stderr]    Compiling quickbacktrack v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.48s
[INFO] running `Command { std: "docker" "inspect" "ebaa8142e60d915ed6b845dc112bf5530477b4e75e5ef2b7d8b9300408bceccf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebaa8142e60d915ed6b845dc112bf5530477b4e75e5ef2b7d8b9300408bceccf", kill_on_drop: false }`
[INFO] [stdout] ebaa8142e60d915ed6b845dc112bf5530477b4e75e5ef2b7d8b9300408bceccf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 557da976a5a1e07dbe7d66115bd69af20616ffa793d521ecfd36d077ca4cb348
[INFO] running `Command { std: "docker" "start" "-a" "557da976a5a1e07dbe7d66115bd69af20616ffa793d521ecfd36d077ca4cb348", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/quickbacktrack-9a1f17fb5b881903)
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests quickbacktrack
[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" "557da976a5a1e07dbe7d66115bd69af20616ffa793d521ecfd36d077ca4cb348", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557da976a5a1e07dbe7d66115bd69af20616ffa793d521ecfd36d077ca4cb348", kill_on_drop: false }`
[INFO] [stdout] 557da976a5a1e07dbe7d66115bd69af20616ffa793d521ecfd36d077ca4cb348