[INFO] cloning repository https://github.com/johnward/bft
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnward/bft" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnward%2Fbft", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnward%2Fbft'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c167d9a66aece1c6c434135eb96da1e202ac5bc1
[INFO] building johnward/bft against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnward%2Fbft" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnward/bft on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnward/bft
[INFO] finished tweaking git repo https://github.com/johnward/bft
[INFO] tweaked toml for git repo https://github.com/johnward/bft written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johnward/bft 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fecd133f40f236b6c03b3415c054208cf24e7caacfda7773c5d0c627c547cc5c
[INFO] running `Command { std: "docker" "start" "-a" "fecd133f40f236b6c03b3415c054208cf24e7caacfda7773c5d0c627c547cc5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fecd133f40f236b6c03b3415c054208cf24e7caacfda7773c5d0c627c547cc5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fecd133f40f236b6c03b3415c054208cf24e7caacfda7773c5d0c627c547cc5c", kill_on_drop: false }`
[INFO] [stdout] fecd133f40f236b6c03b3415c054208cf24e7caacfda7773c5d0c627c547cc5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e27deb0bd23ba56425d2cff543a4ac5339787fa796dfaec12741cdeebc69394c
[INFO] running `Command { std: "docker" "start" "-a" "e27deb0bd23ba56425d2cff543a4ac5339787fa796dfaec12741cdeebc69394c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling bft_types v0.1.0 (/opt/rustwide/workdir/bft_types)
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling bft_interp v0.1.0 (/opt/rustwide/workdir/bft_interp)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> bft_interp/src/lib.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             (number_to_add - ((u8::max_value() - current_number) + 1)) // + 1 to take into account the zero
[INFO] [stdout]    |             ^                                                        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 50 -             (number_to_add - ((u8::max_value() - current_number) + 1)) // + 1 to take into account the zero
[INFO] [stdout] 50 +             number_to_add - ((u8::max_value() - current_number) + 1) // + 1 to take into account the zero
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> bft_interp/src/lib.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             (u8::max_value() - ((number_to_sub - current_number) - 1)) // - 1 to take into account the zero
[INFO] [stdout]    |             ^                                                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 59 -             (u8::max_value() - ((number_to_sub - current_number) - 1)) // - 1 to take into account the zero
[INFO] [stdout] 59 +             u8::max_value() - ((number_to_sub - current_number) - 1) // - 1 to take into account the zero
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `can_grow` is never read
[INFO] [stdout]    --> bft_interp/src/lib.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 99  | pub struct BFVirtualMachine<'a, T> {
[INFO] [stdout]     |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 103 |     can_grow: bool,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BFVirtualMachine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling bft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.35s
[INFO] running `Command { std: "docker" "inspect" "e27deb0bd23ba56425d2cff543a4ac5339787fa796dfaec12741cdeebc69394c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e27deb0bd23ba56425d2cff543a4ac5339787fa796dfaec12741cdeebc69394c", kill_on_drop: false }`
[INFO] [stdout] e27deb0bd23ba56425d2cff543a4ac5339787fa796dfaec12741cdeebc69394c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af8f0c0f594cbe86d9b076cf20756ba1877c35ffca8de5e511d50ea7feed2d8f
[INFO] running `Command { std: "docker" "start" "-a" "af8f0c0f594cbe86d9b076cf20756ba1877c35ffca8de5e511d50ea7feed2d8f", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> bft_interp/src/lib.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             (number_to_add - ((u8::max_value() - current_number) + 1)) // + 1 to take into account the zero
[INFO] [stdout]    |             ^                                                        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 50 -             (number_to_add - ((u8::max_value() - current_number) + 1)) // + 1 to take into account the zero
[INFO] [stdout] 50 +             number_to_add - ((u8::max_value() - current_number) + 1) // + 1 to take into account the zero
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> bft_interp/src/lib.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             (u8::max_value() - ((number_to_sub - current_number) - 1)) // - 1 to take into account the zero
[INFO] [stdout]    |             ^                                                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 59 -             (u8::max_value() - ((number_to_sub - current_number) - 1)) // - 1 to take into account the zero
[INFO] [stdout] 59 +             u8::max_value() - ((number_to_sub - current_number) - 1) // - 1 to take into account the zero
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `can_grow` is never read
[INFO] [stdout]    --> bft_interp/src/lib.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 99  | pub struct BFVirtualMachine<'a, T> {
[INFO] [stdout]     |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 103 |     can_grow: bool,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BFVirtualMachine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling bft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "af8f0c0f594cbe86d9b076cf20756ba1877c35ffca8de5e511d50ea7feed2d8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af8f0c0f594cbe86d9b076cf20756ba1877c35ffca8de5e511d50ea7feed2d8f", kill_on_drop: false }`
[INFO] [stdout] af8f0c0f594cbe86d9b076cf20756ba1877c35ffca8de5e511d50ea7feed2d8f