[INFO] crate weakjson 0.0.7 is already in cache
[INFO] checking weakjson-0.0.7 against beta-2019-10-27 for pr-65897
[INFO] extracting crate weakjson 0.0.7 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate weakjson 0.0.7 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 weakjson 0.0.7
[INFO] finished tweaking crates.io crate weakjson 0.0.7
[INFO] tweaked toml for crates.io crate weakjson 0.0.7 written to /workspace/builds/worker-3/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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stdout] 241f2ece360e709e1e8e65fe03951f332fb4de30b84b80baaf7ac7ed8fa8ecad
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "241f2ece360e709e1e8e65fe03951f332fb4de30b84b80baaf7ac7ed8fa8ecad"`
[INFO] [stderr]     Checking weakjson v0.0.7 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0573]: expected type, found variant `String`
[INFO] [stderr]   --> src/weak_tests.rs:11:24
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn mk_object(items: &[(String, Json)]) -> Json {
[INFO] [stderr]    |                        ^^^^^^ not a type
[INFO] [stderr] help: possible better candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::prelude::v1::String;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::string::String;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `weakjson`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "241f2ece360e709e1e8e65fe03951f332fb4de30b84b80baaf7ac7ed8fa8ecad"`
[INFO] running `"docker" "rm" "-f" "241f2ece360e709e1e8e65fe03951f332fb4de30b84b80baaf7ac7ed8fa8ecad"`
[INFO] [stdout] 241f2ece360e709e1e8e65fe03951f332fb4de30b84b80baaf7ac7ed8fa8ecad