[INFO] fetching crate fire 0.4.0...
[INFO] checking fire-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate fire 0.4.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate fire 0.4.0
[INFO] finished tweaking crates.io crate fire 0.4.0
[INFO] tweaked toml for crates.io crate fire 0.4.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fire 0.4.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 33 packages to latest compatible versions
[INFO] [stderr]       Adding serial_test v2.0.0 (available: v3.2.0)
[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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f5c42034a92d203de29ee279a1478f8995464bc26649c07e32ef22895d60303f
[INFO] running `Command { std: "docker" "start" "-a" "f5c42034a92d203de29ee279a1478f8995464bc26649c07e32ef22895d60303f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5c42034a92d203de29ee279a1478f8995464bc26649c07e32ef22895d60303f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5c42034a92d203de29ee279a1478f8995464bc26649c07e32ef22895d60303f", kill_on_drop: false }`
[INFO] [stdout] f5c42034a92d203de29ee279a1478f8995464bc26649c07e32ef22895d60303f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 952a3a10c67d7d0c6048cd6f124e502cb978e9ca6c544a9f82e19bd403edb184
[INFO] running `Command { std: "docker" "start" "-a" "952a3a10c67d7d0c6048cd6f124e502cb978e9ca6c544a9f82e19bd403edb184", kill_on_drop: false }`
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking dashmap v5.5.3
[INFO] [stderr]     Checking fire v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]    Compiling serial_test_derive v2.0.0
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking serial_test v2.0.0
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> tests/tests.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fire::run!();
[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 macro `fire::run` (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]   --> tests/tests.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fire::run!();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `fire::run` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fire` (test "tests") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "952a3a10c67d7d0c6048cd6f124e502cb978e9ca6c544a9f82e19bd403edb184", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "952a3a10c67d7d0c6048cd6f124e502cb978e9ca6c544a9f82e19bd403edb184", kill_on_drop: false }`
[INFO] [stdout] 952a3a10c67d7d0c6048cd6f124e502cb978e9ca6c544a9f82e19bd403edb184