[INFO] cloning repository https://github.com/rakivo/robuild
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rakivo/robuild" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakivo%2Frobuild", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakivo%2Frobuild'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce87b322e4fc040f3c88b27cbba6fe59b02eecf6
[INFO] testing rakivo/robuild against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakivo%2Frobuild" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rakivo/robuild
[INFO] finished tweaking git repo https://github.com/rakivo/robuild
[INFO] tweaked toml for git repo https://github.com/rakivo/robuild written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rakivo/robuild on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ae41d00f1fe66129021841f4530563327beef88e13fbb8268c3d5fdcc6e5869
[INFO] running `Command { std: "docker" "start" "-a" "9ae41d00f1fe66129021841f4530563327beef88e13fbb8268c3d5fdcc6e5869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ae41d00f1fe66129021841f4530563327beef88e13fbb8268c3d5fdcc6e5869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ae41d00f1fe66129021841f4530563327beef88e13fbb8268c3d5fdcc6e5869", kill_on_drop: false }`
[INFO] [stdout] 9ae41d00f1fe66129021841f4530563327beef88e13fbb8268c3d5fdcc6e5869
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b2a7e939398f806c969289632fc775996fab71c390532950de72c6741df278c
[INFO] running `Command { std: "docker" "start" "-a" "2b2a7e939398f806c969289632fc775996fab71c390532950de72c6741df278c", kill_on_drop: false }`
[INFO] [stderr]    Compiling robuild v0.0.33 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "2b2a7e939398f806c969289632fc775996fab71c390532950de72c6741df278c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b2a7e939398f806c969289632fc775996fab71c390532950de72c6741df278c", kill_on_drop: false }`
[INFO] [stdout] 2b2a7e939398f806c969289632fc775996fab71c390532950de72c6741df278c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f8b88364115f416546fc3c317be8ab8695fed0f173c39ef1a77a46162eabb25
[INFO] running `Command { std: "docker" "start" "-a" "3f8b88364115f416546fc3c317be8ab8695fed0f173c39ef1a77a46162eabb25", kill_on_drop: false }`
[INFO] [stderr]    Compiling robuild v0.0.33 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `std::io::Error`
[INFO] [stdout]   --> examples/main.rs:69:30
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn main() -> IoResult::<()> {
[INFO] [stdout]    |              -------------- expected `std::io::Error` because of this
[INFO] [stdout] ...
[INFO] [stdout] 69 |         .execute_jobs_async()?;
[INFO] [stdout]    |          --------------------^ the trait `From<RobError>` is not implemented for `std::io::Error`
[INFO] [stdout]    |          |
[INFO] [stdout]    |          this can't be annotated with `?` because it has type `Result<_, RobError>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `std::io::Error` implements `From<ErrorKind>`
[INFO] [stdout]              `std::io::Error` implements `From<IntoInnerError<W>>`
[INFO] [stdout]              `std::io::Error` implements `From<NulError>`
[INFO] [stdout]              `std::io::Error` implements `From<TryReserveError>`
[INFO] [stdout]              `std::io::Error` implements `From<std::fs::TryLockError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `robuild` (example "main") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3f8b88364115f416546fc3c317be8ab8695fed0f173c39ef1a77a46162eabb25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f8b88364115f416546fc3c317be8ab8695fed0f173c39ef1a77a46162eabb25", kill_on_drop: false }`
[INFO] [stdout] 3f8b88364115f416546fc3c317be8ab8695fed0f173c39ef1a77a46162eabb25