[INFO] fetching crate mutexpect 0.2.7...
[INFO] checking mutexpect-0.2.7 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate mutexpect 0.2.7 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mutexpect 0.2.7 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutexpect 0.2.7
[INFO] finished tweaking crates.io crate mutexpect 0.2.7
[INFO] tweaked toml for crates.io crate mutexpect 0.2.7 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding twobit v0.1.1 (latest: v0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded twobit v0.1.1
[INFO] [stderr]   Downloaded pattern_partition_prediction v0.1.4
[INFO] [stderr]   Downloaded tabfile v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d6c1d23ecf082195196c4a192e067b9e6dcbe4cff72cc286a1415ab4c7350d6
[INFO] running `Command { std: "docker" "start" "-a" "3d6c1d23ecf082195196c4a192e067b9e6dcbe4cff72cc286a1415ab4c7350d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d6c1d23ecf082195196c4a192e067b9e6dcbe4cff72cc286a1415ab4c7350d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d6c1d23ecf082195196c4a192e067b9e6dcbe4cff72cc286a1415ab4c7350d6", kill_on_drop: false }`
[INFO] [stdout] 3d6c1d23ecf082195196c4a192e067b9e6dcbe4cff72cc286a1415ab4c7350d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 220b964b33c2d8ecdb0a220a2234d41c85932bcd552ab662a09a83d9cd1127d3
[INFO] running `Command { std: "docker" "start" "-a" "220b964b33c2d8ecdb0a220a2234d41c85932bcd552ab662a09a83d9cd1127d3", kill_on_drop: false }`
[INFO] [stderr]     Checking tabfile v0.2.1
[INFO] [stderr]     Checking twobit v0.1.1
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking pattern_partition_prediction v0.1.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]    Compiling serde_repr v0.1.19
[INFO] [stderr]     Checking thiserror v1.0.63
[INFO] [stderr]     Checking mutexpect v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:287:26
[INFO] [stdout]     |
[INFO] [stdout] 287 |                     0 => (middle_index - 2..middle_index + 0 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 287 -                     0 => (middle_index - 2..middle_index + 0 + 1),
[INFO] [stdout] 287 +                     0 => middle_index - 2..middle_index + 0 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:288:26
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     1 => (middle_index - 1..middle_index + 1 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 288 -                     1 => (middle_index - 1..middle_index + 1 + 1),
[INFO] [stdout] 288 +                     1 => middle_index - 1..middle_index + 1 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:289:26
[INFO] [stdout]     |
[INFO] [stdout] 289 |                     2 => (middle_index - 0..middle_index + 2 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 289 -                     2 => (middle_index - 0..middle_index + 2 + 1),
[INFO] [stdout] 289 +                     2 => middle_index - 0..middle_index + 2 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:287:26
[INFO] [stdout]     |
[INFO] [stdout] 287 |                     0 => (middle_index - 2..middle_index + 0 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 287 -                     0 => (middle_index - 2..middle_index + 0 + 1),
[INFO] [stdout] 287 +                     0 => middle_index - 2..middle_index + 0 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:288:26
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     1 => (middle_index - 1..middle_index + 1 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 288 -                     1 => (middle_index - 1..middle_index + 1 + 1),
[INFO] [stdout] 288 +                     1 => middle_index - 1..middle_index + 1 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/point_mutation_classifier.rs:289:26
[INFO] [stdout]     |
[INFO] [stdout] 289 |                     2 => (middle_index - 0..middle_index + 2 + 1),
[INFO] [stdout]     |                          ^                                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 289 -                     2 => (middle_index - 0..middle_index + 2 + 1),
[INFO] [stdout] 289 +                     2 => middle_index - 0..middle_index + 2 + 1,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.62s
[INFO] running `Command { std: "docker" "inspect" "220b964b33c2d8ecdb0a220a2234d41c85932bcd552ab662a09a83d9cd1127d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "220b964b33c2d8ecdb0a220a2234d41c85932bcd552ab662a09a83d9cd1127d3", kill_on_drop: false }`
[INFO] [stdout] 220b964b33c2d8ecdb0a220a2234d41c85932bcd552ab662a09a83d9cd1127d3