[INFO] fetching crate tectonic_xetex_format 0.3.2...
[INFO] checking tectonic_xetex_format-0.3.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate tectonic_xetex_format 0.3.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate tectonic_xetex_format 0.3.2
[INFO] finished tweaking crates.io crate tectonic_xetex_format 0.3.2
[INFO] tweaked toml for crates.io crate tectonic_xetex_format 0.3.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tectonic_xetex_format 0.3.2 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 tectonic_xetex_format 0.3.2 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 30c894758cbfafb43d95b4ef85152b8231e32b151d725ea2507afcc24876d541
[INFO] running `Command { std: "docker" "start" "-a" "30c894758cbfafb43d95b4ef85152b8231e32b151d725ea2507afcc24876d541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30c894758cbfafb43d95b4ef85152b8231e32b151d725ea2507afcc24876d541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30c894758cbfafb43d95b4ef85152b8231e32b151d725ea2507afcc24876d541", kill_on_drop: false }`
[INFO] [stdout] 30c894758cbfafb43d95b4ef85152b8231e32b151d725ea2507afcc24876d541
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] b5c6f3171a44a99ffcf8f0997dc1a29f40071462d627e0932403275a66a2b1e9
[INFO] running `Command { std: "docker" "start" "-a" "b5c6f3171a44a99ffcf8f0997dc1a29f40071462d627e0932403275a66a2b1e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking tectonic_errors v0.2.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking tectonic_xetex_format v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stdout] error: this type will no longer be must used: StdResult<PathBuf, Infallible>
[INFO] [stdout]   --> examples/decode.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | /     /// The format filename.
[INFO] [stdout] 51 | |     #[structopt()]
[INFO] [stdout] 52 | |     path: 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: StdResult<PathBuf, Infallible>
[INFO] [stdout]   --> examples/decode.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | /     /// The format filename.
[INFO] [stdout] 95 | |     #[structopt()]
[INFO] [stdout] 96 | |     path: PathBuf,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tectonic_xetex_format` (example "decode") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b5c6f3171a44a99ffcf8f0997dc1a29f40071462d627e0932403275a66a2b1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5c6f3171a44a99ffcf8f0997dc1a29f40071462d627e0932403275a66a2b1e9", kill_on_drop: false }`
[INFO] [stdout] b5c6f3171a44a99ffcf8f0997dc1a29f40071462d627e0932403275a66a2b1e9