[INFO] cloning repository https://github.com/reidswan/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reidswan/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b926b2c59ce1f8b7be8bec6dfbf1aaaceb9ebab
[INFO] checking reidswan/rlox against e7769602aca3770e8d8ea55716becb22e839a579 for pr-161253
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freidswan%2Frlox" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/reidswan/rlox
[INFO] finished tweaking git repo https://github.com/reidswan/rlox
[INFO] tweaked toml for git repo https://github.com/reidswan/rlox written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/reidswan/rlox on toolchain e7769602aca3770e8d8ea55716becb22e839a579
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e7769602aca3770e8d8ea55716becb22e839a579" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/reidswan/rlox 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" "+e7769602aca3770e8d8ea55716becb22e839a579" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lazy_static v1.4.0
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded strsim v0.8.0
[INFO] [stderr]   Downloaded unicode-width v0.1.7
[INFO] [stderr]   Downloaded bitflags v1.2.1
[INFO] [stderr]   Downloaded atty v0.2.13
[INFO] [stderr]   Downloaded ansi_term v0.11.0
[INFO] [stderr]   Downloaded clap v2.33.0
[INFO] [stderr]   Downloaded libc v0.2.66
[INFO] [stderr]   Downloaded winapi v0.3.8
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18
[INFO] running `Command { std: "docker" "start" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18" "/opt/rustwide/cargo-home/bin/cargo" "+e7769602aca3770e8d8ea55716becb22e839a579" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18" "/opt/rustwide/cargo-home/bin/cargo" "+e7769602aca3770e8d8ea55716becb22e839a579" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking treelox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]   --> src/interpeter.rs:47:24
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Result<_, _>>()?;
[INFO] [stdout]    |              -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]    |              |
[INFO] [stdout]    |              required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<A, E>>` is conditionally implemented for `Result<V, E>`
[INFO] [stdout]   --> /rustc/e7769602aca3770e8d8ea55716becb22e839a579/library/core/src/result.rs:2113:14
[INFO] [stdout]    |
[INFO] [stdout]    = note: unsatisfied requirement introduced here: `_: FromIterator<_>`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout]    = note: required for `Result<!, String>` to implement `FromIterator<Result<(), String>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/e7769602aca3770e8d8ea55716becb22e839a579/library/core/src/iter/traits/iterator.rs:2073:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]   --> src/interpeter.rs:47:24
[INFO] [stdout]    |
[INFO] [stdout] 47 |             .collect::<Result<_, _>>()?;
[INFO] [stdout]    |              -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]    |              |
[INFO] [stdout]    |              required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<A, E>>` is conditionally implemented for `Result<V, E>`
[INFO] [stdout]   --> /rustc/e7769602aca3770e8d8ea55716becb22e839a579/library/core/src/result.rs:2113:14
[INFO] [stdout]    |
[INFO] [stdout]    = note: unsatisfied requirement introduced here: `_: FromIterator<_>`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout]    = note: required for `Result<!, String>` to implement `FromIterator<Result<(), String>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/e7769602aca3770e8d8ea55716becb22e839a579/library/core/src/iter/traits/iterator.rs:2073:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `treelox` (bin "treelox") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `treelox` (bin "treelox" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18", kill_on_drop: false }`
[INFO] [stdout] a1e46b5965bc778de674f77cfecb0af8433e42dc4e8d67c66f6ff792026bbe18
