[INFO] updating cached repository https://github.com/augustt198/json-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53f09b4fe8ed5cc8a91acf614f2284f974933502
[INFO] checking augustt198/json-rs against nightly-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faugustt198%2Fjson-rs" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/augustt198/json-rs on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/augustt198/json-rs
[INFO] finished tweaking git repo https://github.com/augustt198/json-rs
[INFO] tweaked toml for git repo https://github.com/augustt198/json-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/augustt198/json-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+nightly-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] 16c9875c4e3f0662b643a76d6c5a8eaeb36e5d0821f6db179e24a6915e30e5aa
[INFO] running `"docker" "start" "-a" "16c9875c4e3f0662b643a76d6c5a8eaeb36e5d0821f6db179e24a6915e30e5aa"`
[INFO] [stderr]     Checking json v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]   --> src/lib.rs:32:30
[INFO] [stderr]    |
[INFO] [stderr] 32 |             Some(self.source.as_slice().char_at(self.pos))
[INFO] [stderr]    |                              ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]    --> src/lib.rs:159:29
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let ident_str = res.as_slice();
[INFO] [stderr]     |                             ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]    --> src/lib.rs:189:27
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let num_str = res.as_slice();
[INFO] [stderr]     |                           ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `json`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]   --> src/lib.rs:32:30
[INFO] [stderr]    |
[INFO] [stderr] 32 |             Some(self.source.as_slice().char_at(self.pos))
[INFO] [stderr]    |                              ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]    --> src/lib.rs:159:29
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let ident_str = res.as_slice();
[INFO] [stderr]     |                             ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]    --> src/lib.rs:189:27
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let num_str = res.as_slice();
[INFO] [stderr]     |                           ^^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `json`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "16c9875c4e3f0662b643a76d6c5a8eaeb36e5d0821f6db179e24a6915e30e5aa"`
[INFO] running `"docker" "rm" "-f" "16c9875c4e3f0662b643a76d6c5a8eaeb36e5d0821f6db179e24a6915e30e5aa"`
[INFO] [stdout] 16c9875c4e3f0662b643a76d6c5a8eaeb36e5d0821f6db179e24a6915e30e5aa