[INFO] cloning repository https://github.com/jelmer/r-description-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jelmer/r-description-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjelmer%2Fr-description-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjelmer%2Fr-description-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f593d8c6e3b44469433714f4ca24d9e8806b89a2
[INFO] checking jelmer/r-description-rs against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjelmer%2Fr-description-rs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jelmer/r-description-rs
[INFO] finished tweaking git repo https://github.com/jelmer/r-description-rs
[INFO] tweaked toml for git repo https://github.com/jelmer/r-description-rs written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jelmer/r-description-rs 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 git repo https://github.com/jelmer/r-description-rs 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] [stderr]     Blocking waiting for file lock on package cache
[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] 6d1b56e3bf316e1e3f1860dbe8eec31adbab21f0c54b24be9d1d7c55078e6d78
[INFO] running `Command { std: "docker" "start" "-a" "6d1b56e3bf316e1e3f1860dbe8eec31adbab21f0c54b24be9d1d7c55078e6d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d1b56e3bf316e1e3f1860dbe8eec31adbab21f0c54b24be9d1d7c55078e6d78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d1b56e3bf316e1e3f1860dbe8eec31adbab21f0c54b24be9d1d7c55078e6d78", kill_on_drop: false }`
[INFO] [stdout] 6d1b56e3bf316e1e3f1860dbe8eec31adbab21f0c54b24be9d1d7c55078e6d78
[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] bbdb78f5e3f086c6df95aea4e49267387bac3281d2cef1d48f56d2c86cfb32b2
[INFO] running `Command { std: "docker" "start" "-a" "bbdb78f5e3f086c6df95aea4e49267387bac3281d2cef1d48f56d2c86cfb32b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]     Checking litemap v0.8.1
[INFO] [stderr]     Checking writeable v0.6.2
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling icu_properties_data v2.1.1
[INFO] [stderr]    Compiling icu_normalizer_data v2.1.1
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]     Checking percent-encoding v2.3.2
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking text-size v1.1.1
[INFO] [stderr]     Checking countme v3.0.1
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking form_urlencoded v1.2.2
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]     Checking rowan v0.16.1
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling zerovec-derive v0.11.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling deb822-derive v0.3.0
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.1
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stderr]     Checking deb822-fast v0.2.0
[INFO] [stderr]     Checking zerofrom v0.1.6
[INFO] [stderr]     Checking yoke v0.8.1
[INFO] [stderr]     Checking zerotrie v0.2.3
[INFO] [stderr]     Checking zerovec v0.11.5
[INFO] [stderr]     Checking tinystr v0.8.2
[INFO] [stderr]     Checking potential_utf v0.1.4
[INFO] [stderr]     Checking icu_locale_core v2.1.1
[INFO] [stderr]     Checking icu_collections v2.1.1
[INFO] [stderr]     Checking icu_provider v2.1.1
[INFO] [stderr]     Checking icu_normalizer v2.1.1
[INFO] [stderr]     Checking icu_properties v2.1.1
[INFO] [stderr]     Checking deb822-lossless v0.4.0
[INFO] [stderr]     Checking idna_adapter v1.2.1
[INFO] [stderr]     Checking idna v1.1.0
[INFO] [stderr]     Checking url v2.5.7
[INFO] [stderr]     Checking r-description v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lossy.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 | #[derive(FromDeb822, ToDeb822, Debug, PartialEq, Eq)]
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `FromDeb822` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `r-description` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lossy.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 | #[derive(FromDeb822, ToDeb822, Debug, PartialEq, Eq)]
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `FromDeb822` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `r-description` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "bbdb78f5e3f086c6df95aea4e49267387bac3281d2cef1d48f56d2c86cfb32b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbdb78f5e3f086c6df95aea4e49267387bac3281d2cef1d48f56d2c86cfb32b2", kill_on_drop: false }`
[INFO] [stdout] bbdb78f5e3f086c6df95aea4e49267387bac3281d2cef1d48f56d2c86cfb32b2