[INFO] fetching crate built 0.8.0...
[INFO] checking built-0.8.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate built 0.8.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate built 0.8.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate built 0.8.0
[INFO] tweaked toml for crates.io crate built 0.8.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate built 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 built 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 1307e8cbd0b15063f1533032b49b7a8f2ffaa33c62f23d381cf95ae2868ae951
[INFO] running `Command { std: "docker" "start" "-a" "1307e8cbd0b15063f1533032b49b7a8f2ffaa33c62f23d381cf95ae2868ae951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1307e8cbd0b15063f1533032b49b7a8f2ffaa33c62f23d381cf95ae2868ae951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1307e8cbd0b15063f1533032b49b7a8f2ffaa33c62f23d381cf95ae2868ae951", kill_on_drop: false }`
[INFO] [stdout] 1307e8cbd0b15063f1533032b49b7a8f2ffaa33c62f23d381cf95ae2868ae951
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 06983b6f9391285cdcd8f6ee524810e0543d1877f6f4363d103639b77407f925
[INFO] running `Command { std: "docker" "start" "-a" "06983b6f9391285cdcd8f6ee524810e0543d1877f6f4363d103639b77407f925", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]     Checking bitflags v2.9.0
[INFO] [stderr]     Checking built v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rustix v1.0.7
[INFO] [stdout] error: this type will no longer be must used: Result<&str, Infallible>
[INFO] [stdout]   --> src/util.rs:74:62
[INFO] [stdout]    |
[INFO] [stdout] 74 |       fn parse_from_env(s: &'a str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  ______________________________________________________________^
[INFO] [stdout] 75 | |         Ok(s)
[INFO] [stdout] 76 | |     }
[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<&str, Infallible>
[INFO] [stdout]   --> src/util.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         Ok(s)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/util.rs:84:67
[INFO] [stdout]    |
[INFO] [stdout] 84 |               fn parse_from_env(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  ___________________________________________________________________^
[INFO] [stdout] 85 | |                 s.parse()
[INFO] [stdout] 86 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] ...
[INFO] [stdout] 95 |   parsefromenv_impl!(i64, i32, i16, i8, u64, u32, u16, u8, bool, String);
[INFO] [stdout]    |   ---------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `parsefromenv_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/util.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 s.parse()
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 | parsefromenv_impl!(i64, i32, i16, i8, u64, u32, u16, u8, bool, String);
[INFO] [stdout]    | ---------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `parsefromenv_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `built` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "06983b6f9391285cdcd8f6ee524810e0543d1877f6f4363d103639b77407f925", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06983b6f9391285cdcd8f6ee524810e0543d1877f6f4363d103639b77407f925", kill_on_drop: false }`
[INFO] [stdout] 06983b6f9391285cdcd8f6ee524810e0543d1877f6f4363d103639b77407f925