[INFO] fetching crate bitread 0.1.9...
[INFO] checking bitread-0.1.9 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate bitread 0.1.9 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate bitread 0.1.9
[INFO] finished tweaking crates.io crate bitread 0.1.9
[INFO] tweaked toml for crates.io crate bitread 0.1.9 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate bitread 0.1.9 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 90480bcdcb3587cce396e0d432c8b69f9bb854db7863114698be5d56a6d0bf64
[INFO] running `Command { std: "docker" "start" "-a" "90480bcdcb3587cce396e0d432c8b69f9bb854db7863114698be5d56a6d0bf64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90480bcdcb3587cce396e0d432c8b69f9bb854db7863114698be5d56a6d0bf64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90480bcdcb3587cce396e0d432c8b69f9bb854db7863114698be5d56a6d0bf64", kill_on_drop: false }`
[INFO] [stdout] 90480bcdcb3587cce396e0d432c8b69f9bb854db7863114698be5d56a6d0bf64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f595bab696a091d975baf9b238ebea7214d0390194206cca8b4c83264db61693
[INFO] running `Command { std: "docker" "start" "-a" "f595bab696a091d975baf9b238ebea7214d0390194206cca8b4c83264db61693", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling bitread_macro v0.1.7
[INFO] [stderr]     Checking bitread v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PositionWithInactivityTimer, bitread::ReadError>
[INFO] [stdout]   --> src/lib.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |     #[derive(BitRead, Debug, PartialEq)]
[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 `BitRead` (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<PositionWithInactivityTimer, bitread::ReadError>
[INFO] [stdout]   --> src/lib.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |             PositionWithInactivityTimer::read_from(data.as_slice()).unwrap();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<SkipDefaultTest, bitread::ReadError>
[INFO] [stdout]    --> src/lib.rs:119:14
[INFO] [stdout]     |
[INFO] [stdout] 119 |     #[derive(BitRead, Debug, PartialEq)]
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the derive macro `BitRead` (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<SkipDefaultTest, bitread::ReadError>
[INFO] [stdout]    --> src/lib.rs:154:46
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let position_with_inactivity_timer = SkipDefaultTest::read_from(data.as_slice()).unwrap();
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitread` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "f595bab696a091d975baf9b238ebea7214d0390194206cca8b4c83264db61693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f595bab696a091d975baf9b238ebea7214d0390194206cca8b4c83264db61693", kill_on_drop: false }`
[INFO] [stdout] f595bab696a091d975baf9b238ebea7214d0390194206cca8b4c83264db61693
