[INFO] cloning repository https://github.com/shan-by/rustexamples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shan-by/rustexamples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf616338543a9c3dc1c1138a68c0a39c12d9e657
[INFO] testing shan-by/rustexamples against master#595316b4006932405a63862d8fe65f71a6356293 for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shan-by/rustexamples on toolchain 595316b4006932405a63862d8fe65f71a6356293
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595316b4006932405a63862d8fe65f71a6356293" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shan-by/rustexamples
[INFO] finished tweaking git repo https://github.com/shan-by/rustexamples
[INFO] tweaked toml for git repo https://github.com/shan-by/rustexamples written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shan-by/rustexamples 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" "+595316b4006932405a63862d8fe65f71a6356293" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing shan-by/rustexamples against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shan-by/rustexamples on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shan-by/rustexamples
[INFO] finished tweaking git repo https://github.com/shan-by/rustexamples
[INFO] tweaked toml for git repo https://github.com/shan-by/rustexamples written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shan-by/rustexamples 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" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing shan-by/rustexamples against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shan-by/rustexamples on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shan-by/rustexamples
[INFO] finished tweaking git repo https://github.com/shan-by/rustexamples
[INFO] tweaked toml for git repo https://github.com/shan-by/rustexamples written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shan-by/rustexamples 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" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing shan-by/rustexamples against try#5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b for pr-128254
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshan-by%2Frustexamples" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shan-by/rustexamples on toolchain 5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shan-by/rustexamples
[INFO] finished tweaking git repo https://github.com/shan-by/rustexamples
[INFO] tweaked toml for git repo https://github.com/shan-by/rustexamples written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shan-by/rustexamples 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" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a935a8da2ce1d759d5b9d3044c77b093370b8e8f58bec9819a42ae685c948ca
[INFO] running `Command { std: "docker" "start" "-a" "5a935a8da2ce1d759d5b9d3044c77b093370b8e8f58bec9819a42ae685c948ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a935a8da2ce1d759d5b9d3044c77b093370b8e8f58bec9819a42ae685c948ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a935a8da2ce1d759d5b9d3044c77b093370b8e8f58bec9819a42ae685c948ca", kill_on_drop: false }`
[INFO] [stdout] 5a935a8da2ce1d759d5b9d3044c77b093370b8e8f58bec9819a42ae685c948ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33fcfbc2bb22eacda06e2d48d8c5b7b8759643c593eb73b0945de96bbc5fc04b
[INFO] running `Command { std: "docker" "start" "-a" "33fcfbc2bb22eacda06e2d48d8c5b7b8759643c593eb73b0945de96bbc5fc04b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustexamples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |     println!("{}", rgb1=RGB(128, 255, 90));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 60 |     println!("{rgb1}", rgb1=RGB(128, 255, 90));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |     println!("{}", rgb1=RGB(0, 3, 254));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 61 |     println!("{rgb1}", rgb1=RGB(0, 3, 254));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     println!("{}", rgb1=RGB(0, 0, 0));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 62 |     println!("{rgb1}", rgb1=RGB(0, 0, 0));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "33fcfbc2bb22eacda06e2d48d8c5b7b8759643c593eb73b0945de96bbc5fc04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33fcfbc2bb22eacda06e2d48d8c5b7b8759643c593eb73b0945de96bbc5fc04b", kill_on_drop: false }`
[INFO] [stdout] 33fcfbc2bb22eacda06e2d48d8c5b7b8759643c593eb73b0945de96bbc5fc04b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76571a5d3dbb5f7042f3dee458bc0e95a9b602439acd66353be3698b7906d976
[INFO] running `Command { std: "docker" "start" "-a" "76571a5d3dbb5f7042f3dee458bc0e95a9b602439acd66353be3698b7906d976", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustexamples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |     println!("{}", rgb1=RGB(128, 255, 90));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 60 |     println!("{rgb1}", rgb1=RGB(128, 255, 90));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |     println!("{}", rgb1=RGB(0, 3, 254));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 61 |     println!("{rgb1}", rgb1=RGB(0, 3, 254));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `rgb1` is not used by name
[INFO] [stdout]   --> src/main.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     println!("{}", rgb1=RGB(0, 0, 0));
[INFO] [stdout]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |               |
[INFO] [stdout]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stdout]    |
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 62 |     println!("{rgb1}", rgb1=RGB(0, 0, 0));
[INFO] [stdout]    |                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "76571a5d3dbb5f7042f3dee458bc0e95a9b602439acd66353be3698b7906d976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76571a5d3dbb5f7042f3dee458bc0e95a9b602439acd66353be3698b7906d976", kill_on_drop: false }`
[INFO] [stdout] 76571a5d3dbb5f7042f3dee458bc0e95a9b602439acd66353be3698b7906d976
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5e89635d7bf1d3033c2eb20378b7b3cbe2dd1a9b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4e81aa57f5584e379ba0dc08a96d235e84845b5af59571255775696d4eeb77c7
[INFO] running `Command { std: "docker" "start" "-a" "4e81aa57f5584e379ba0dc08a96d235e84845b5af59571255775696d4eeb77c7", kill_on_drop: false }`
[INFO] [stderr] warning: named argument `rgb1` is not used by name
[INFO] [stderr]   --> src/main.rs:60:20
[INFO] [stderr]    |
[INFO] [stderr] 60 |     println!("{}", rgb1=RGB(128, 255, 90));
[INFO] [stderr]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stderr]    |               |
[INFO] [stderr]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stderr] help: use the named argument by name to avoid ambiguity
[INFO] [stderr]    |
[INFO] [stderr] 60 |     println!("{rgb1}", rgb1=RGB(128, 255, 90));
[INFO] [stderr]    |                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: named argument `rgb1` is not used by name
[INFO] [stderr]   --> src/main.rs:61:20
[INFO] [stderr]    |
[INFO] [stderr] 61 |     println!("{}", rgb1=RGB(0, 3, 254));
[INFO] [stderr]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stderr]    |               |
[INFO] [stderr]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stderr]    |
[INFO] [stderr] help: use the named argument by name to avoid ambiguity
[INFO] [stderr]    |
[INFO] [stderr] 61 |     println!("{rgb1}", rgb1=RGB(0, 3, 254));
[INFO] [stderr]    |                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: named argument `rgb1` is not used by name
[INFO] [stderr]   --> src/main.rs:62:20
[INFO] [stderr]    |
[INFO] [stderr] 62 |     println!("{}", rgb1=RGB(0, 0, 0));
[INFO] [stderr]    |               --   ^^^^ this named argument is referred to by position in formatting string
[INFO] [stderr]    |               |
[INFO] [stderr]    |               this formatting argument uses named argument `rgb1` by position
[INFO] [stderr]    |
[INFO] [stderr] help: use the named argument by name to avoid ambiguity
[INFO] [stderr]    |
[INFO] [stderr] 62 |     println!("{rgb1}", rgb1=RGB(0, 0, 0));
[INFO] [stderr]    |                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rustexamples` (bin "rustexamples" test) generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustexamples-b25ee9163e0b52d7)
[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" "4e81aa57f5584e379ba0dc08a96d235e84845b5af59571255775696d4eeb77c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e81aa57f5584e379ba0dc08a96d235e84845b5af59571255775696d4eeb77c7", kill_on_drop: false }`
[INFO] [stdout] 4e81aa57f5584e379ba0dc08a96d235e84845b5af59571255775696d4eeb77c7