[INFO] cloning repository https://github.com/Ruannilton/Builder [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ruannilton/Builder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRuannilton%2FBuilder", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRuannilton%2FBuilder'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2d830c5821cff5d3cc5644ab1717da46dd56b4b0 [INFO] testing Ruannilton/Builder against 1.59.0 for beta-1.60-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRuannilton%2FBuilder" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Ruannilton/Builder on toolchain 1.59.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Ruannilton/Builder [INFO] finished tweaking git repo https://github.com/Ruannilton/Builder [INFO] tweaked toml for git repo https://github.com/Ruannilton/Builder written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/Ruannilton/Builder already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.semver.feature [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b2cbe26c029a857d9b2ef371b2037a16cf88bdb85c1c97f6a7c079ddd6d77c33 [INFO] running `Command { std: "docker" "start" "-a" "b2cbe26c029a857d9b2ef371b2037a16cf88bdb85c1c97f6a7c079ddd6d77c33", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b2cbe26c029a857d9b2ef371b2037a16cf88bdb85c1c97f6a7c079ddd6d77c33", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b2cbe26c029a857d9b2ef371b2037a16cf88bdb85c1c97f6a7c079ddd6d77c33", kill_on_drop: false }` [INFO] [stdout] b2cbe26c029a857d9b2ef371b2037a16cf88bdb85c1c97f6a7c079ddd6d77c33 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c6ca60c4f570c0367e6f4aeb02cb21859f81debb34c3668a2b17f59666acc1ae [INFO] running `Command { std: "docker" "start" "-a" "c6ca60c4f570c0367e6f4aeb02cb21859f81debb34c3668a2b17f59666acc1ae", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.semver.feature [INFO] [stderr] Compiling syn v1.0.56 [INFO] [stderr] Compiling libc v0.2.81 [INFO] [stderr] Compiling serde_derive v1.0.118 [INFO] [stderr] Compiling serde v1.0.118 [INFO] [stderr] Compiling ucd-trie v0.1.3 [INFO] [stderr] Compiling serde_json v1.0.61 [INFO] [stderr] Compiling once_cell v1.5.2 [INFO] [stderr] Compiling yaml-rust v0.3.5 [INFO] [stderr] Compiling itoa v0.4.7 [INFO] [stderr] Compiling fs_extra v1.2.0 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling thread_local v1.1.2 [INFO] [stderr] Compiling pest v2.1.3 [INFO] [stderr] Compiling regex v1.4.3 [INFO] [stderr] Compiling semver-parser v0.10.2 [INFO] [stderr] Compiling semver v0.11.0 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling dirs-sys v0.3.5 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling dirs v3.0.1 [INFO] [stderr] Compiling clap v2.33.3 [INFO] [stderr] Compiling thiserror-impl v1.0.23 [INFO] [stderr] Compiling thiserror v1.0.23 [INFO] [stderr] Compiling which v4.0.2 [INFO] [stderr] Compiling toml v0.5.8 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling builder v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::path::Path` [INFO] [stdout] --> src/models/data.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::path::Path; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/commands/mod.rs:395:13 [INFO] [stdout] | [INFO] [stdout] 395 | let mut dependencies = proj.get_all_dependencies(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `parse_conf` [INFO] [stdout] --> src/models/data.rs:341:12 [INFO] [stdout] | [INFO] [stdout] 341 | pub fn parse_conf(&self) -> HashMap>> { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_path` [INFO] [stdout] --> src/models/data.rs:412:12 [INFO] [stdout] | [INFO] [stdout] 412 | pub fn get_path(&self) -> PathBuf { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_versions` [INFO] [stdout] --> src/models/data.rs:416:12 [INFO] [stdout] | [INFO] [stdout] 416 | pub fn get_versions(&self) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:87:17 [INFO] [stdout] | [INFO] [stdout] 87 | fs::write(src_dir, format!{"#include \"{}.h\"\n\nint main(){{\nreturn 0;\n}}\n",name.clone(),}); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:88:17 [INFO] [stdout] | [INFO] [stdout] 88 | fs::write(head_dir, format!{"#ifndef {}\n#define {}\n#include \n#endif",header_guard,header_guard}); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:231:17 [INFO] [stdout] | [INFO] [stdout] 231 | fs::create_dir_all(&build_dir); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 26.47s [INFO] running `Command { std: "docker" "inspect" "c6ca60c4f570c0367e6f4aeb02cb21859f81debb34c3668a2b17f59666acc1ae", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c6ca60c4f570c0367e6f4aeb02cb21859f81debb34c3668a2b17f59666acc1ae", kill_on_drop: false }` [INFO] [stdout] c6ca60c4f570c0367e6f4aeb02cb21859f81debb34c3668a2b17f59666acc1ae [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 301689c8dbb04758739e3219bdf2561b9e4c6c5d76e149fb37b848ac5a5fd3b2 [INFO] running `Command { std: "docker" "start" "-a" "301689c8dbb04758739e3219bdf2561b9e4c6c5d76e149fb37b848ac5a5fd3b2", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.semver.feature [INFO] [stderr] Compiling builder v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::path::Path` [INFO] [stdout] --> src/models/data.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::path::Path; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/commands/mod.rs:395:13 [INFO] [stdout] | [INFO] [stdout] 395 | let mut dependencies = proj.get_all_dependencies(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `parse_conf` [INFO] [stdout] --> src/models/data.rs:341:12 [INFO] [stdout] | [INFO] [stdout] 341 | pub fn parse_conf(&self) -> HashMap>> { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_path` [INFO] [stdout] --> src/models/data.rs:412:12 [INFO] [stdout] | [INFO] [stdout] 412 | pub fn get_path(&self) -> PathBuf { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_versions` [INFO] [stdout] --> src/models/data.rs:416:12 [INFO] [stdout] | [INFO] [stdout] 416 | pub fn get_versions(&self) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:87:17 [INFO] [stdout] | [INFO] [stdout] 87 | fs::write(src_dir, format!{"#include \"{}.h\"\n\nint main(){{\nreturn 0;\n}}\n",name.clone(),}); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:88:17 [INFO] [stdout] | [INFO] [stdout] 88 | fs::write(head_dir, format!{"#ifndef {}\n#define {}\n#include \n#endif",header_guard,header_guard}); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/commands/mod.rs:231:17 [INFO] [stdout] | [INFO] [stdout] 231 | fs::create_dir_all(&build_dir); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.76s [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "301689c8dbb04758739e3219bdf2561b9e4c6c5d76e149fb37b848ac5a5fd3b2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "301689c8dbb04758739e3219bdf2561b9e4c6c5d76e149fb37b848ac5a5fd3b2", kill_on_drop: false }` [INFO] [stdout] 301689c8dbb04758739e3219bdf2561b9e4c6c5d76e149fb37b848ac5a5fd3b2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] dbdc81945687938b9b8a09d21b3f09b748bfa20a9af08af872fdb74231e93dc2 [INFO] running `Command { std: "docker" "start" "-a" "dbdc81945687938b9b8a09d21b3f09b748bfa20a9af08af872fdb74231e93dc2", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.semver.feature [INFO] [stderr] warning: unused import: `std::path::Path` [INFO] [stderr] --> src/models/data.rs:8:5 [INFO] [stderr] | [INFO] [stderr] 8 | use std::path::Path; [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/commands/mod.rs:395:13 [INFO] [stderr] | [INFO] [stderr] 395 | let mut dependencies = proj.get_all_dependencies(); [INFO] [stderr] | ----^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `parse_conf` [INFO] [stderr] --> src/models/data.rs:341:12 [INFO] [stderr] | [INFO] [stderr] 341 | pub fn parse_conf(&self) -> HashMap>> { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `get_path` [INFO] [stderr] --> src/models/data.rs:412:12 [INFO] [stderr] | [INFO] [stderr] 412 | pub fn get_path(&self) -> PathBuf { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `get_versions` [INFO] [stderr] --> src/models/data.rs:416:12 [INFO] [stderr] | [INFO] [stderr] 416 | pub fn get_versions(&self) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/commands/mod.rs:87:17 [INFO] [stderr] | [INFO] [stderr] 87 | fs::write(src_dir, format!{"#include \"{}.h\"\n\nint main(){{\nreturn 0;\n}}\n",name.clone(),}); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/commands/mod.rs:88:17 [INFO] [stderr] | [INFO] [stderr] 88 | fs::write(head_dir, format!{"#ifndef {}\n#define {}\n#include \n#endif",header_guard,header_guard}); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/commands/mod.rs:231:17 [INFO] [stderr] | [INFO] [stderr] 231 | fs::create_dir_all(&build_dir); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: `builder` (bin "builder" test) generated 8 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/builder-813cfcb164dccaa9) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "dbdc81945687938b9b8a09d21b3f09b748bfa20a9af08af872fdb74231e93dc2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dbdc81945687938b9b8a09d21b3f09b748bfa20a9af08af872fdb74231e93dc2", kill_on_drop: false }` [INFO] [stdout] dbdc81945687938b9b8a09d21b3f09b748bfa20a9af08af872fdb74231e93dc2