[INFO] fetching crate crankstart-cli 0.2.9...
[INFO] checking crankstart-cli-0.2.9 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate crankstart-cli 0.2.9 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate crankstart-cli 0.2.9
[INFO] finished tweaking crates.io crate crankstart-cli 0.2.9
[INFO] tweaked toml for crates.io crate crankstart-cli 0.2.9 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate crankstart-cli 0.2.9 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate crankstart-cli 0.2.9 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 177497e991ff8b06b0a170e7533c774de08a80b33f8f0a70f47c9c3902d99ed3
[INFO] running `Command { std: "docker" "start" "-a" "177497e991ff8b06b0a170e7533c774de08a80b33f8f0a70f47c9c3902d99ed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "177497e991ff8b06b0a170e7533c774de08a80b33f8f0a70f47c9c3902d99ed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "177497e991ff8b06b0a170e7533c774de08a80b33f8f0a70f47c9c3902d99ed3", kill_on_drop: false }`
[INFO] [stdout] 177497e991ff8b06b0a170e7533c774de08a80b33f8f0a70f47c9c3902d99ed3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd9c9a4d7e622190d23943acdf8f4e874d91f535f9b9b4e5edf63809dd2fa9bf
[INFO] running `Command { std: "docker" "start" "-a" "dd9c9a4d7e622190d23943acdf8f4e874d91f535f9b9b4e5edf63809dd2fa9bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling serde_json v1.0.99
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling syn v2.0.22
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking bzip2 v0.4.4
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling serde_derive v1.0.164
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking zip v0.5.13
[INFO] [stderr]     Checking zip-extensions v0.6.1
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking cargo_metadata v0.10.0
[INFO] [stderr]     Checking crankstart-cli v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 | /     /// Build a specific example from the examples/ dir.
[INFO] [stdout] 162 | |     #[structopt(long)]
[INFO] [stdout] 163 | |     example: Option<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:784:5
[INFO] [stdout]     |
[INFO] [stdout] 784 | /     /// Build a specific example from the examples/ dir.
[INFO] [stdout] 785 | |     #[structopt(long)]
[INFO] [stdout] 786 | |     example: Option<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/main.rs:864:5
[INFO] [stdout]     |
[INFO] [stdout] 864 | /     /// Path to Cargo.toml
[INFO] [stdout] 865 | |     #[structopt(long, global = true)]
[INFO] [stdout] 866 | |     manifest_path: Option<PathBuf>,
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crankstart-cli` (bin "crank") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 | /     /// Build a specific example from the examples/ dir.
[INFO] [stdout] 162 | |     #[structopt(long)]
[INFO] [stdout] 163 | |     example: Option<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/main.rs:784:5
[INFO] [stdout]     |
[INFO] [stdout] 784 | /     /// Build a specific example from the examples/ dir.
[INFO] [stdout] 785 | |     #[structopt(long)]
[INFO] [stdout] 786 | |     example: Option<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/main.rs:864:5
[INFO] [stdout]     |
[INFO] [stdout] 864 | /     /// Path to Cargo.toml
[INFO] [stdout] 865 | |     #[structopt(long, global = true)]
[INFO] [stdout] 866 | |     manifest_path: Option<PathBuf>,
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crankstart-cli` (bin "crank" test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "dd9c9a4d7e622190d23943acdf8f4e874d91f535f9b9b4e5edf63809dd2fa9bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd9c9a4d7e622190d23943acdf8f4e874d91f535f9b9b4e5edf63809dd2fa9bf", kill_on_drop: false }`
[INFO] [stdout] dd9c9a4d7e622190d23943acdf8f4e874d91f535f9b9b4e5edf63809dd2fa9bf