[INFO] crate joker 0.0.5 is already in cache
[INFO] checking joker-0.0.5 against beta-2019-10-27 for pr-65897
[INFO] extracting crate joker 0.0.5 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate joker 0.0.5 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate joker 0.0.5
[INFO] removed path dependency unjson from crates.io crate joker 0.0.5
[INFO] finished tweaking crates.io crate joker 0.0.5
[INFO] tweaked toml for crates.io crate joker 0.0.5 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f24cdbc7dd6980766fe14e86f2f7ce01e0fc3974cb0209116563ada0a3921f64
[INFO] running `"docker" "start" "-a" "f24cdbc7dd6980766fe14e86f2f7ce01e0fc3974cb0209116563ada0a3921f64"`
[INFO] [stderr]     Checking serde_json v0.7.4
[INFO] [stderr]     Checking unjson v0.0.5
[INFO] [stderr]     Checking joker v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/test.rs:349:29
[INFO] [stderr]     |
[INFO] [stderr] 349 |                     source: format!("{:?}", Value::String(value.to_string())),
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected enum `std::option::Option`, found struct `std::string::String`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `std::option::Option<std::string::String>`
[INFO] [stderr]                found type `std::string::String`
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] help: try using a variant of the expected type
[INFO] [stderr]     |
[INFO] [stderr] 2   | (Some(::alloc::fmt::format(<::core::fmt::Arguments>::new_v1(&[""],
[INFO] [stderr] 3   |                                                       &match (&Value::String(value.to_string()),)
[INFO] [stderr] 4   |                                                            {
[INFO] [stderr] 5   |                                                            (arg0,) =>
[INFO] [stderr] 6   |                                                            [<::core::fmt::ArgumentV1>::new(arg0,
[INFO] [stderr] 7   |                                                                                            ::core::fmt::Debug::fmt)],
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `joker`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f24cdbc7dd6980766fe14e86f2f7ce01e0fc3974cb0209116563ada0a3921f64"`
[INFO] running `"docker" "rm" "-f" "f24cdbc7dd6980766fe14e86f2f7ce01e0fc3974cb0209116563ada0a3921f64"`
[INFO] [stdout] f24cdbc7dd6980766fe14e86f2f7ce01e0fc3974cb0209116563ada0a3921f64