[INFO] fetching crate b2 0.1.0...
[INFO] checking b2-0.1.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate b2 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate b2 0.1.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate b2 0.1.0
[INFO] finished tweaking crates.io crate b2 0.1.0
[INFO] tweaked toml for crates.io crate b2 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e522f8c3ff2d18cc3dbbbe22dcdb8fa20cf93d5e0a2417028933ac26792fde74
[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" "e522f8c3ff2d18cc3dbbbe22dcdb8fa20cf93d5e0a2417028933ac26792fde74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e522f8c3ff2d18cc3dbbbe22dcdb8fa20cf93d5e0a2417028933ac26792fde74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e522f8c3ff2d18cc3dbbbe22dcdb8fa20cf93d5e0a2417028933ac26792fde74", kill_on_drop: false }`
[INFO] [stdout] e522f8c3ff2d18cc3dbbbe22dcdb8fa20cf93d5e0a2417028933ac26792fde74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--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] 34c9ad4c9b7fcc0055180222e8fefe7d931a86156709131f7c74887c37787edb
[INFO] running `Command { std: "docker" "start" "-a" "34c9ad4c9b7fcc0055180222e8fefe7d931a86156709131f7c74887c37787edb", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking gif v0.8.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.21
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking png v0.5.2
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking image v0.9.1
[INFO] [stderr]     Checking b2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.54s
[INFO] running `Command { std: "docker" "inspect" "34c9ad4c9b7fcc0055180222e8fefe7d931a86156709131f7c74887c37787edb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34c9ad4c9b7fcc0055180222e8fefe7d931a86156709131f7c74887c37787edb", kill_on_drop: false }`
[INFO] [stdout] 34c9ad4c9b7fcc0055180222e8fefe7d931a86156709131f7c74887c37787edb