[INFO] cloning repository https://github.com/zhenlu1936/babyse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhenlu1936/babyse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenlu1936%2Fbabyse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenlu1936%2Fbabyse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 87f0e8058c3692cdc4045ef8a4409a1fee4160c0
[INFO] checking zhenlu1936/babyse against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenlu1936%2Fbabyse" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zhenlu1936/babyse
[INFO] finished tweaking git repo https://github.com/zhenlu1936/babyse
[INFO] tweaked toml for git repo https://github.com/zhenlu1936/babyse written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zhenlu1936/babyse 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 git repo https://github.com/zhenlu1936/babyse 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] 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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95bf1d8b598c55e34cbad6c4b7e658c56ab8792f680d18a927dabe976a8493be
[INFO] running `Command { std: "docker" "start" "-a" "95bf1d8b598c55e34cbad6c4b7e658c56ab8792f680d18a927dabe976a8493be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95bf1d8b598c55e34cbad6c4b7e658c56ab8792f680d18a927dabe976a8493be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95bf1d8b598c55e34cbad6c4b7e658c56ab8792f680d18a927dabe976a8493be", kill_on_drop: false }`
[INFO] [stdout] 95bf1d8b598c55e34cbad6c4b7e658c56ab8792f680d18a927dabe976a8493be
[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 -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] 0e116bf35165e92d2c2057a9c937f07aa41b524750427165adf55b2dee2130ca
[INFO] running `Command { std: "docker" "start" "-a" "0e116bf35165e92d2c2057a9c937f07aa41b524750427165adf55b2dee2130ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling babyse_derive v0.1.0 (/opt/rustwide/workdir/babyse_derive)
[INFO] [stderr]     Checking babyse_main v0.1.0 (/opt/rustwide/workdir/babyse_main)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> babyse_main/tests/test.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let f: Foo = *b.downcast::<Foo>().expect("wrong type");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bar`
[INFO] [stdout]   --> babyse_main/tests/test.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let bar: Bar = *b.downcast::<Bar>().expect("wrong type");
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_bar`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> babyse_main/tests/test.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Debug, BabySerialize, BabyDeserialize)]
[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 `BabyDeserialize` (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: Result<String, Infallible>
[INFO] [stdout]   --> babyse_main/tests/test.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, BabySerialize, BabyDeserialize)]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `BabyDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `babyse_main` (test "test") due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0e116bf35165e92d2c2057a9c937f07aa41b524750427165adf55b2dee2130ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e116bf35165e92d2c2057a9c937f07aa41b524750427165adf55b2dee2130ca", kill_on_drop: false }`
[INFO] [stdout] 0e116bf35165e92d2c2057a9c937f07aa41b524750427165adf55b2dee2130ca