[INFO] updating cached repository https://github.com/felipesere/jsondiffers
[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] f18a55ac78b88b64ab7bd70c611d45d0351a0328
[INFO] checking felipesere/jsondiffers against try#ba14a92a10441c4b839ce71e6ef5f7a48bbff18f for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffelipesere%2Fjsondiffers" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/felipesere/jsondiffers on toolchain ba14a92a10441c4b839ce71e6ef5f7a48bbff18f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/felipesere/jsondiffers
[INFO] finished tweaking git repo https://github.com/felipesere/jsondiffers
[INFO] tweaked toml for git repo https://github.com/felipesere/jsondiffers written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/felipesere/jsondiffers already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7a6aad3a3e463b728aeef836012db75441c388efcffa92292e94d946bd8a9e22
[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" "7a6aad3a3e463b728aeef836012db75441c388efcffa92292e94d946bd8a9e22"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking jsondiffers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `stringify`
[INFO] [stderr]  --> src/printer.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn stringify(val: Value) -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print`
[INFO] [stderr]   --> src/printer.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn print(output: &mut String, value: Value) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_object`
[INFO] [stderr]   --> src/printer.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn print_object(output: &mut String, object: Map<String, Value>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_array`
[INFO] [stderr]   --> src/printer.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn print_array(output: &mut String, values: Vec<Value>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string`
[INFO] [stderr]   --> src/printer.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn string(output: &mut String, value: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
[INFO] running `"docker" "inspect" "7a6aad3a3e463b728aeef836012db75441c388efcffa92292e94d946bd8a9e22"`
[INFO] running `"docker" "rm" "-f" "7a6aad3a3e463b728aeef836012db75441c388efcffa92292e94d946bd8a9e22"`
[INFO] [stdout] 7a6aad3a3e463b728aeef836012db75441c388efcffa92292e94d946bd8a9e22