[INFO] cloning repository https://github.com/drizzlevanta/errorhandling
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drizzlevanta/errorhandling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrizzlevanta%2Ferrorhandling", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrizzlevanta%2Ferrorhandling'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d486826b59c262209024ed77eaaf02535fd263d
[INFO] checking drizzlevanta/errorhandling against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrizzlevanta%2Ferrorhandling" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/drizzlevanta/errorhandling
[INFO] finished tweaking git repo https://github.com/drizzlevanta/errorhandling
[INFO] tweaked toml for git repo https://github.com/drizzlevanta/errorhandling written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/drizzlevanta/errorhandling on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/drizzlevanta/errorhandling 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c17d8ecf5c7b2133919beab52f81396749fd50de5a816eec29c9dc301116d047
[INFO] running `Command { std: "docker" "start" "-a" "c17d8ecf5c7b2133919beab52f81396749fd50de5a816eec29c9dc301116d047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c17d8ecf5c7b2133919beab52f81396749fd50de5a816eec29c9dc301116d047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c17d8ecf5c7b2133919beab52f81396749fd50de5a816eec29c9dc301116d047", kill_on_drop: false }`
[INFO] [stdout] c17d8ecf5c7b2133919beab52f81396749fd50de5a816eec29c9dc301116d047
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb7ddf6acf921157ede6fb7efa4f6874710c419ec239abe9d5b80bfff36891e7
[INFO] running `Command { std: "docker" "start" "-a" "cb7ddf6acf921157ede6fb7efa4f6874710c419ec239abe9d5b80bfff36891e7", kill_on_drop: false }`
[INFO] [stderr]     Checking errorhandling v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `propagate_errors_shortcut2` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn propagate_errors_shortcut2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `propagate_errors_shortcut1` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn propagate_errors_shortcut1() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn read_username_from_file() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `propagate_errors_shortcut2` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn propagate_errors_shortcut2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `propagate_errors_shortcut1` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn propagate_errors_shortcut1() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/propagate_errors.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn read_username_from_file() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/propagate_errors.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fs::read_to_string("hellouser.txt");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let _ = fs::read_to_string("hellouser.txt");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/propagate_errors.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fs::read_to_string("hellouser.txt");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let _ = fs::read_to_string("hellouser.txt");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "cb7ddf6acf921157ede6fb7efa4f6874710c419ec239abe9d5b80bfff36891e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb7ddf6acf921157ede6fb7efa4f6874710c419ec239abe9d5b80bfff36891e7", kill_on_drop: false }`
[INFO] [stdout] cb7ddf6acf921157ede6fb7efa4f6874710c419ec239abe9d5b80bfff36891e7