[INFO] cloning repository https://github.com/Matthew-Teixeira/serialize_deserialize_json
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Matthew-Teixeira/serialize_deserialize_json" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthew-Teixeira%2Fserialize_deserialize_json", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthew-Teixeira%2Fserialize_deserialize_json'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76d5f6be6b9003fbfe5bc4b27cb662ab9367f95f
[INFO] checking Matthew-Teixeira/serialize_deserialize_json against try#969026c535f4240ff7866ef11207dfda18a26af6 for pr-146504
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthew-Teixeira%2Fserialize_deserialize_json" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json
[INFO] finished tweaking git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json
[INFO] tweaked toml for git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json on toolchain 969026c535f4240ff7866ef11207dfda18a26af6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json 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" "+969026c535f4240ff7866ef11207dfda18a26af6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking Matthew-Teixeira/serialize_deserialize_json against try#969026c535f4240ff7866ef11207dfda18a26af6 for pr-146504
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthew-Teixeira%2Fserialize_deserialize_json" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json
[INFO] finished tweaking git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json
[INFO] tweaked toml for git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json on toolchain 969026c535f4240ff7866ef11207dfda18a26af6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Matthew-Teixeira/serialize_deserialize_json 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" "+969026c535f4240ff7866ef11207dfda18a26af6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpufeatures v0.2.13
[INFO] [stderr]   Downloaded postgres-protocol v0.6.7
[INFO] [stderr]   Downloaded cc v1.1.15
[INFO] [stderr]   Downloaded postgres v0.19.8
[INFO] [stderr]   Downloaded serde_derive v1.0.209
[INFO] [stderr]   Downloaded unicode-properties v0.1.2
[INFO] [stderr]   Downloaded serde v1.0.209
[INFO] [stderr]   Downloaded serde_json v1.0.127
[INFO] [stderr]   Downloaded whoami v1.5.1
[INFO] [stderr]   Downloaded postgres-types v0.2.7
[INFO] [stderr]   Downloaded tokio-postgres v0.7.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef0eea53d97885d676ca436df6046437a99ab2196dc084667355e89392eb57c5
[INFO] running `Command { std: "docker" "start" "-a" "ef0eea53d97885d676ca436df6046437a99ab2196dc084667355e89392eb57c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef0eea53d97885d676ca436df6046437a99ab2196dc084667355e89392eb57c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef0eea53d97885d676ca436df6046437a99ab2196dc084667355e89392eb57c5", kill_on_drop: false }`
[INFO] [stdout] ef0eea53d97885d676ca436df6046437a99ab2196dc084667355e89392eb57c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a979423f603ede28ca1fd079f93c24ae9602a26923d0b7b6108a79a68eb5605f
[INFO] running `Command { std: "docker" "start" "-a" "a979423f603ede28ca1fd079f93c24ae9602a26923d0b7b6108a79a68eb5605f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking bytes v1.7.1
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking cpufeatures v0.2.13
[INFO] [stderr]     Checking unicode-properties v0.1.2
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling serde_json v1.0.127
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking whoami v1.5.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking stringprep v0.1.5
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking mio v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking tokio v1.39.3
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]    Compiling async-trait v0.1.81
[INFO] [stderr]     Checking tokio-util v0.7.11
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking postgres-protocol v0.6.7
[INFO] [stderr]     Checking postgres-types v0.2.7
[INFO] [stderr]     Checking tokio-postgres v0.7.11
[INFO] [stderr]     Checking postgres v0.19.8
[INFO] [stderr]     Checking json_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rust_struct`
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let rust_struct = to_struct(&json_str)?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rust_struct`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rust_struct`
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let rust_struct = to_struct(&json_str)?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rust_struct`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `userId` should have a snake case name
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     userId: Option<i32>,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to snake case: `user_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `userId` should have a snake case name
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     userId: Option<i32>,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to snake case: `user_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.01s
[INFO] running `Command { std: "docker" "inspect" "a979423f603ede28ca1fd079f93c24ae9602a26923d0b7b6108a79a68eb5605f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a979423f603ede28ca1fd079f93c24ae9602a26923d0b7b6108a79a68eb5605f", kill_on_drop: false }`
[INFO] [stdout] a979423f603ede28ca1fd079f93c24ae9602a26923d0b7b6108a79a68eb5605f