[INFO] fetching crate sleuth 0.2.1...
[INFO] checking sleuth-0.2.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate sleuth 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate sleuth 0.2.1
[INFO] finished tweaking crates.io crate sleuth 0.2.1
[INFO] tweaked toml for crates.io crate sleuth 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sleuth 0.2.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee66ab5f4d4a6e4e4fb5feb22561e0b41b2dc75af9dd8dab33411bb8e4068e88
[INFO] running `Command { std: "docker" "start" "-a" "ee66ab5f4d4a6e4e4fb5feb22561e0b41b2dc75af9dd8dab33411bb8e4068e88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee66ab5f4d4a6e4e4fb5feb22561e0b41b2dc75af9dd8dab33411bb8e4068e88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee66ab5f4d4a6e4e4fb5feb22561e0b41b2dc75af9dd8dab33411bb8e4068e88", kill_on_drop: false }`
[INFO] [stdout] ee66ab5f4d4a6e4e4fb5feb22561e0b41b2dc75af9dd8dab33411bb8e4068e88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34cbe67e7244c6f0db55b1fff540956f800683fbac4499aea67afbeea909abf1
[INFO] running `Command { std: "docker" "start" "-a" "34cbe67e7244c6f0db55b1fff540956f800683fbac4499aea67afbeea909abf1", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling prettyplease v0.2.35
[INFO] [stderr]     Checking colored v3.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]    Compiling sleuth-mutator v0.2.1
[INFO] [stderr]     Checking sleuth v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stdout]   --> src/util.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stdout]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stdout]   --> src/util.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stdout]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sleuth` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `sleuth` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "34cbe67e7244c6f0db55b1fff540956f800683fbac4499aea67afbeea909abf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34cbe67e7244c6f0db55b1fff540956f800683fbac4499aea67afbeea909abf1", kill_on_drop: false }`
[INFO] [stdout] 34cbe67e7244c6f0db55b1fff540956f800683fbac4499aea67afbeea909abf1