[INFO] fetching crate rust2fun_laws 0.2.1...
[INFO] checking rust2fun_laws-0.2.1 against try#149edce6c6ee840adb602803b96d083101ef3592 for pr-133502-16
[INFO] extracting crate rust2fun_laws 0.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate rust2fun_laws 0.2.1
[INFO] finished tweaking crates.io crate rust2fun_laws 0.2.1
[INFO] tweaked toml for crates.io crate rust2fun_laws 0.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust2fun_laws 0.2.1 on toolchain 149edce6c6ee840adb602803b96d083101ef3592
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+149edce6c6ee840adb602803b96d083101ef3592" "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" "+149edce6c6ee840adb602803b96d083101ef3592" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+149edce6c6ee840adb602803b96d083101ef3592" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+149edce6c6ee840adb602803b96d083101ef3592" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd238c0b308c7ef7faa75e886d4f5ce0d984cb52f0104e287c67d680c9d54ad6
[INFO] running `Command { std: "docker" "start" "-a" "fd238c0b308c7ef7faa75e886d4f5ce0d984cb52f0104e287c67d680c9d54ad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd238c0b308c7ef7faa75e886d4f5ce0d984cb52f0104e287c67d680c9d54ad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd238c0b308c7ef7faa75e886d4f5ce0d984cb52f0104e287c67d680c9d54ad6", kill_on_drop: false }`
[INFO] [stdout] fd238c0b308c7ef7faa75e886d4f5ce0d984cb52f0104e287c67d680c9d54ad6
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+149edce6c6ee840adb602803b96d083101ef3592" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffa88ab4e5a1aa785fd1370cdf47099b4ffbb253122d99abfc608bf6cc3893cc
[INFO] running `Command { std: "docker" "start" "-a" "ffa88ab4e5a1aa785fd1370cdf47099b4ffbb253122d99abfc608bf6cc3893cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rust2fun_macros v0.2.1
[INFO] [stderr]     Checking rust2fun v0.2.1
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rust2fun-0.2.1/src/flatmap.rs:68:14
[INFO] [stdout]    |
[INFO] [stdout] 68 |         self.flat_map(|a| f(a).map(|b| (a, b)))
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `Self: flatmap::FlatMap<_>`
[INFO] [stdout]    = help: the following types implement trait `flatmap::FlatMap<B>`:
[INFO] [stdout]              Box<A>
[INFO] [stdout]              Option<A>
[INFO] [stdout]              PhantomData<A>
[INFO] [stdout]              Result<A, E>
[INFO] [stdout]              Vec<A>
[INFO] [stdout]              ne_vec::NEVec<A>
[INFO] [stdout]              std::collections::BTreeSet<A>
[INFO] [stdout]              std::collections::BinaryHeap<A>
[INFO] [stdout]            and 4 others
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]    |
[INFO] [stdout] 68 -         self.flat_map(|a| f(a).map(|b| (a, b)))
[INFO] [stdout] 68 +         <Self as flatmap::FlatMap<B>>::flat_map::<_>(self, |a| f(a).map(|b| (a, b)))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust2fun` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ffa88ab4e5a1aa785fd1370cdf47099b4ffbb253122d99abfc608bf6cc3893cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffa88ab4e5a1aa785fd1370cdf47099b4ffbb253122d99abfc608bf6cc3893cc", kill_on_drop: false }`
[INFO] [stdout] ffa88ab4e5a1aa785fd1370cdf47099b4ffbb253122d99abfc608bf6cc3893cc