[INFO] fetching crate singularity 0.6.1...
[INFO] checking singularity-0.6.1 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate singularity 0.6.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate singularity 0.6.1 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singularity 0.6.1
[INFO] finished tweaking crates.io crate singularity 0.6.1
[INFO] tweaked toml for crates.io crate singularity 0.6.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate singularity 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded backtrace v0.3.54
[INFO] [stderr]   Downloaded confy v0.4.0
[INFO] [stderr]   Downloaded directories v2.0.2
[INFO] [stderr]   Downloaded cc v1.0.62
[INFO] [stderr]   Downloaded num-format-windows v0.3.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.7.0
[INFO] [stderr]   Downloaded addr2line v0.14.0
[INFO] [stderr]   Downloaded fern v0.6.0
[INFO] [stderr]   Downloaded bindgen v0.47.4
[INFO] [stderr]   Downloaded console v0.13.0
[INFO] [stderr]   Downloaded object v0.22.0
[INFO] [stderr]   Downloaded structopt-derive v0.4.14
[INFO] [stderr]   Downloaded structopt v0.3.21
[INFO] [stderr]   Downloaded num-format v0.4.0
[INFO] [stderr]   Downloaded ureq v2.0.1
[INFO] [stderr]   Downloaded unicode-normalization v0.1.14
[INFO] [stderr]   Downloaded tinyvec v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f57ea6a5bfc31b0fc0e9ebcc66ad4f62356f231bb5c33b53f21a803646ba188e
[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" "f57ea6a5bfc31b0fc0e9ebcc66ad4f62356f231bb5c33b53f21a803646ba188e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f57ea6a5bfc31b0fc0e9ebcc66ad4f62356f231bb5c33b53f21a803646ba188e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f57ea6a5bfc31b0fc0e9ebcc66ad4f62356f231bb5c33b53f21a803646ba188e", kill_on_drop: false }`
[INFO] [stdout] f57ea6a5bfc31b0fc0e9ebcc66ad4f62356f231bb5c33b53f21a803646ba188e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac6fe912be6cdff1960402172eb2b19fefefa920605e90e02357c7321479a448
[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" "ac6fe912be6cdff1960402172eb2b19fefefa920605e90e02357c7321479a448", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling unicode-segmentation v1.7.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking tinyvec v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking encoding_rs v0.8.26
[INFO] [stderr]     Checking arrayvec v0.4.12
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking unicode-normalization v0.1.14
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking console v0.13.0
[INFO] [stderr]     Checking webpki v0.21.3
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]     Checking rustls v0.19.0
[INFO] [stderr]     Checking webpki-roots v0.21.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking serde v1.0.123
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking ureq v2.0.1
[INFO] [stderr]     Checking confy v0.4.0
[INFO] [stderr]     Checking singularity v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.72s
[INFO] running `Command { std: "docker" "inspect" "ac6fe912be6cdff1960402172eb2b19fefefa920605e90e02357c7321479a448", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac6fe912be6cdff1960402172eb2b19fefefa920605e90e02357c7321479a448", kill_on_drop: false }`
[INFO] [stdout] ac6fe912be6cdff1960402172eb2b19fefefa920605e90e02357c7321479a448