[INFO] cloning repository https://github.com/UsairimIsani/proto-programmer [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/UsairimIsani/proto-programmer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsairimIsani%2Fproto-programmer", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsairimIsani%2Fproto-programmer'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 94d1b4d12a8a98d6325595376f50c039aaf7581f [INFO] testing UsairimIsani/proto-programmer against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsairimIsani%2Fproto-programmer" "/workspace/builds/worker-25/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/UsairimIsani/proto-programmer on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/UsairimIsani/proto-programmer [INFO] finished tweaking git repo https://github.com/UsairimIsani/proto-programmer [INFO] tweaked toml for git repo https://github.com/UsairimIsani/proto-programmer written to /workspace/builds/worker-25/source/Cargo.toml [INFO] crate git repo https://github.com/UsairimIsani/proto-programmer already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5986cdf3bcbd0a30f75ac99474c13b7935522dd5a046f06a1e629fc773377549 [INFO] running `Command { std: "docker" "start" "-a" "5986cdf3bcbd0a30f75ac99474c13b7935522dd5a046f06a1e629fc773377549", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5986cdf3bcbd0a30f75ac99474c13b7935522dd5a046f06a1e629fc773377549", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5986cdf3bcbd0a30f75ac99474c13b7935522dd5a046f06a1e629fc773377549", kill_on_drop: false }` [INFO] [stdout] 5986cdf3bcbd0a30f75ac99474c13b7935522dd5a046f06a1e629fc773377549 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 51a19dbfc841b30c8fda4c450a9075f1cd743d445b9cec59291da462ea5cf1dd [INFO] running `Command { std: "docker" "start" "-a" "51a19dbfc841b30c8fda4c450a9075f1cd743d445b9cec59291da462ea5cf1dd", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling proto-programmer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `cmd_args` [INFO] [stdout] --> src/config.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let cmd_args: Args = args(); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cmd_args` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `file_path` [INFO] [stdout] --> src/config.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | file_path: String, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `emit` [INFO] [stdout] --> src/config.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | emit: bool, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `program` [INFO] [stdout] --> src/config.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | program: bool, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | &new_byte_array.push(some); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 16 | let _ = &new_byte_array.push(some); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bittobyte.rs:9:21 [INFO] [stdout] | [INFO] [stdout] 9 | &bytes_array.push(0x67); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 9 | let _ = &bytes_array.push(0x67); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bittobyte.rs:12:21 [INFO] [stdout] | [INFO] [stdout] 12 | &bytes_array.push(0x89); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 12 | let _ = &bytes_array.push(0x89); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 6.88s [INFO] running `Command { std: "docker" "inspect" "51a19dbfc841b30c8fda4c450a9075f1cd743d445b9cec59291da462ea5cf1dd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "51a19dbfc841b30c8fda4c450a9075f1cd743d445b9cec59291da462ea5cf1dd", kill_on_drop: false }` [INFO] [stdout] 51a19dbfc841b30c8fda4c450a9075f1cd743d445b9cec59291da462ea5cf1dd [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] edeeb3a47b623c75b392df95ee2b4d331f6f3576b3910d2c0f266cb1356a29de [INFO] running `Command { std: "docker" "start" "-a" "edeeb3a47b623c75b392df95ee2b4d331f6f3576b3910d2c0f266cb1356a29de", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling proto-programmer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `cmd_args` [INFO] [stdout] --> src/config.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let cmd_args: Args = args(); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cmd_args` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `file_path` [INFO] [stdout] --> src/config.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | file_path: String, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `emit` [INFO] [stdout] --> src/config.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | emit: bool, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `program` [INFO] [stdout] --> src/config.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | program: bool, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/config.rs:3:14 [INFO] [stdout] | [INFO] [stdout] 3 | #[derive(Debug)] [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | &new_byte_array.push(some); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 16 | let _ = &new_byte_array.push(some); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bittobyte.rs:9:21 [INFO] [stdout] | [INFO] [stdout] 9 | &bytes_array.push(0x67); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 9 | let _ = &bytes_array.push(0x67); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bittobyte.rs:12:21 [INFO] [stdout] | [INFO] [stdout] 12 | &bytes_array.push(0x89); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 12 | let _ = &bytes_array.push(0x89); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 33.50s [INFO] running `Command { std: "docker" "inspect" "edeeb3a47b623c75b392df95ee2b4d331f6f3576b3910d2c0f266cb1356a29de", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "edeeb3a47b623c75b392df95ee2b4d331f6f3576b3910d2c0f266cb1356a29de", kill_on_drop: false }` [INFO] [stdout] edeeb3a47b623c75b392df95ee2b4d331f6f3576b3910d2c0f266cb1356a29de [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 0f0eef9674b608c55da773339060e3440db7718ee18a40051ef5184392490f8b [INFO] running `Command { std: "docker" "start" "-a" "0f0eef9674b608c55da773339060e3440db7718ee18a40051ef5184392490f8b", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] warning: unused variable: `cmd_args` [INFO] [stdout] [INFO] [stderr] --> src/config.rs:10:13 [INFO] [stdout] running 0 tests [INFO] [stderr] | [INFO] [stdout] [INFO] [stderr] 10 | let cmd_args: Args = args(); [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cmd_args` [INFO] [stdout] [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `file_path` [INFO] [stderr] --> src/config.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | file_path: String, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] --> src/config.rs:3:14 [INFO] [stderr] | [INFO] [stderr] 3 | #[derive(Debug)] [INFO] [stderr] | ^^^^^ [INFO] [stderr] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: field is never read: `emit` [INFO] [stderr] --> src/config.rs:6:9 [INFO] [stderr] | [INFO] [stderr] 6 | emit: bool, [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] --> src/config.rs:3:14 [INFO] [stderr] | [INFO] [stderr] 3 | #[derive(Debug)] [INFO] [stderr] | ^^^^^ [INFO] [stderr] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: field is never read: `program` [INFO] [stderr] --> src/config.rs:7:9 [INFO] [stderr] | [INFO] [stderr] 7 | program: bool, [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] --> src/config.rs:3:14 [INFO] [stderr] | [INFO] [stderr] 3 | #[derive(Debug)] [INFO] [stderr] | ^^^^^ [INFO] [stderr] = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:16:9 [INFO] [stderr] | [INFO] [stderr] 16 | &new_byte_array.push(some); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 16 | let _ = &new_byte_array.push(some); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/bittobyte.rs:9:21 [INFO] [stderr] | [INFO] [stderr] 9 | &bytes_array.push(0x67); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 9 | let _ = &bytes_array.push(0x67); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/bittobyte.rs:12:21 [INFO] [stderr] | [INFO] [stderr] 12 | &bytes_array.push(0x89); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 12 | let _ = &bytes_array.push(0x89); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `proto-programmer` (bin "proto-programmer" test) generated 7 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1m 50s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/proto_programmer-71590e0bbd039b46) [INFO] running `Command { std: "docker" "inspect" "0f0eef9674b608c55da773339060e3440db7718ee18a40051ef5184392490f8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0f0eef9674b608c55da773339060e3440db7718ee18a40051ef5184392490f8b", kill_on_drop: false }` [INFO] [stdout] 0f0eef9674b608c55da773339060e3440db7718ee18a40051ef5184392490f8b