[INFO] fetching crate singularity 0.8.0...
[INFO] checking singularity-0.8.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate singularity 0.8.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate singularity 0.8.0
[INFO] finished tweaking crates.io crate singularity 0.8.0
[INFO] tweaked toml for crates.io crate singularity 0.8.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate singularity 0.8.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate singularity 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fea60c3d281bc4ca87f25d31bbd485d04071819b3f87b82d4ed1992239ff83e2
[INFO] running `Command { std: "docker" "start" "-a" "fea60c3d281bc4ca87f25d31bbd485d04071819b3f87b82d4ed1992239ff83e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fea60c3d281bc4ca87f25d31bbd485d04071819b3f87b82d4ed1992239ff83e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fea60c3d281bc4ca87f25d31bbd485d04071819b3f87b82d4ed1992239ff83e2", kill_on_drop: false }`
[INFO] [stdout] fea60c3d281bc4ca87f25d31bbd485d04071819b3f87b82d4ed1992239ff83e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ceeae994ff437ff0ac43d25ca72760f94f99cb37bd2e8f1c8d418bbd817157f
[INFO] running `Command { std: "docker" "start" "-a" "2ceeae994ff437ff0ac43d25ca72760f94f99cb37bd2e8f1c8d418bbd817157f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling encoding_rs v0.8.30
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking dirs-sys v0.3.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking console v0.15.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.22.2
[INFO] [stderr]     Checking rustls v0.20.2
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking ureq v2.4.0
[INFO] [stderr]     Checking confy v0.4.0
[INFO] [stderr]     Checking singularity v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 | /     /// Custom path to the app's configuration file. By default the app will use the system-specific user configuration
[INFO] [stdout] 73 | |     /// directory.
[INFO] [stdout] 74 | |     #[structopt(short, long)]
[INFO] [stdout] 75 | |     config: Option<PathBuf>,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 | /     /// Custom path to the app's configuration file. By default the app will use the system-specific user configuration
[INFO] [stdout] 73 | |     /// directory.
[INFO] [stdout] 74 | |     #[structopt(short, long)]
[INFO] [stdout] 75 | |     config: Option<PathBuf>,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `singularity` (bin "singularity" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `singularity` (bin "singularity") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2ceeae994ff437ff0ac43d25ca72760f94f99cb37bd2e8f1c8d418bbd817157f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ceeae994ff437ff0ac43d25ca72760f94f99cb37bd2e8f1c8d418bbd817157f", kill_on_drop: false }`
[INFO] [stdout] 2ceeae994ff437ff0ac43d25ca72760f94f99cb37bd2e8f1c8d418bbd817157f