[INFO] fetching crate nest-cli 0.3.0...
[INFO] checking nest-cli-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate nest-cli 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate nest-cli 0.3.0
[INFO] finished tweaking crates.io crate nest-cli 0.3.0
[INFO] tweaked toml for crates.io crate nest-cli 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nest-cli 0.3.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 115 packages to latest compatible versions
[INFO] [stderr]       Adding clap-verbosity-flag v0.2.0 (available: v3.0.4)
[INFO] [stderr]       Adding structopt v0.2.18 (available: v0.3.26)
[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] 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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddbd974c3938f11a9de4a41193150f520036b3dab5982f3faeda4c0ba7bdb89a
[INFO] running `Command { std: "docker" "start" "-a" "ddbd974c3938f11a9de4a41193150f520036b3dab5982f3faeda4c0ba7bdb89a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddbd974c3938f11a9de4a41193150f520036b3dab5982f3faeda4c0ba7bdb89a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddbd974c3938f11a9de4a41193150f520036b3dab5982f3faeda4c0ba7bdb89a", kill_on_drop: false }`
[INFO] [stdout] ddbd974c3938f11a9de4a41193150f520036b3dab5982f3faeda4c0ba7bdb89a
[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 -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] c90562b7d6f6e829124f47fd9d7d46b8d2c903b4934bab267018c744b7a0e6d8
[INFO] running `Command { std: "docker" "start" "-a" "c90562b7d6f6e829124f47fd9d7d46b8d2c903b4934bab267018c744b7a0e6d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking chrono v0.4.42
[INFO] [stderr]     Checking indexmap v2.12.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking objekt v0.1.2
[INFO] [stderr]     Checking mkdirp v0.1.0
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking atomicwrites v0.2.5
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling snafu-derive v0.2.3
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking clap-verbosity-flag v0.2.0
[INFO] [stderr]     Checking clap-log-flag v0.2.1
[INFO] [stderr]     Checking snafu v0.2.3
[INFO] [stderr]     Checking nest v1.0.0
[INFO] [stderr]     Checking nest-cli v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[derive(Debug, StructOpt)]
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, nest::Value>
[INFO] [stdout]   --> src/main.rs:97:32
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let value: Value = value_json.try_into()?;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<nest::Value, Infallible>
[INFO] [stdout]   --> src/main.rs:97:32
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let value: Value = value_json.try_into()?;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^
[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:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[derive(Debug, StructOpt)]
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, nest::Value>
[INFO] [stdout]   --> src/main.rs:97:32
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let value: Value = value_json.try_into()?;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<nest::Value, Infallible>
[INFO] [stdout]   --> src/main.rs:97:32
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let value: Value = value_json.try_into()?;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nest-cli` (bin "nest") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `nest-cli` (bin "nest" test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "c90562b7d6f6e829124f47fd9d7d46b8d2c903b4934bab267018c744b7a0e6d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c90562b7d6f6e829124f47fd9d7d46b8d2c903b4934bab267018c744b7a0e6d8", kill_on_drop: false }`
[INFO] [stdout] c90562b7d6f6e829124f47fd9d7d46b8d2c903b4934bab267018c744b7a0e6d8