[INFO] cloning repository https://github.com/muhtutorials/json_serde
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/muhtutorials/json_serde" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuhtutorials%2Fjson_serde", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuhtutorials%2Fjson_serde'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9937507ce47df7d85f36bdbe9edd6684d86f93ec
[INFO] checking muhtutorials/json_serde against try#ac4c3613be2acd5395b65d85e5657b81e3c982f0 for pr-154585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuhtutorials%2Fjson_serde" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/muhtutorials/json_serde
[INFO] finished tweaking git repo https://github.com/muhtutorials/json_serde
[INFO] tweaked toml for git repo https://github.com/muhtutorials/json_serde written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/muhtutorials/json_serde on toolchain ac4c3613be2acd5395b65d85e5657b81e3c982f0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/muhtutorials/json_serde 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" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5d005232a3231bb7d5d9641c363a066fcf7ac2710f643e7eb733eeb7f675593
[INFO] running `Command { std: "docker" "start" "-a" "c5d005232a3231bb7d5d9641c363a066fcf7ac2710f643e7eb733eeb7f675593", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5d005232a3231bb7d5d9641c363a066fcf7ac2710f643e7eb733eeb7f675593", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5d005232a3231bb7d5d9641c363a066fcf7ac2710f643e7eb733eeb7f675593", kill_on_drop: false }`
[INFO] [stdout] c5d005232a3231bb7d5d9641c363a066fcf7ac2710f643e7eb733eeb7f675593
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a12aca419369c74f53aec48103442ebc6483d269fe93e01c4e7ec4c2e6be58ba
[INFO] running `Command { std: "docker" "start" "-a" "a12aca419369c74f53aec48103442ebc6483d269fe93e01c4e7ec4c2e6be58ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking json_serde v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::marker::PhantomData`
[INFO] [stdout]  --> src/visitor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::marker::PhantomData;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::marker::PhantomData`
[INFO] [stdout]  --> src/visitor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::marker::PhantomData;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `CounterTerrorists` is never constructed
[INFO] [stdout]   --> src/visitor.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub enum Team {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     CounterTerrorists,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Team` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]   --> src/ser.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn to_string<T>(value: &T) -> Result<String>
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `E` is never used
[INFO] [stdout]    --> src/ser.rs:485:6
[INFO] [stdout]     |
[INFO] [stdout] 485 | enum E {
[INFO] [stdout]     |      ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `from_str` is never used
[INFO] [stdout]   --> src/de.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn from_str<'a, T>(s: &'a str) -> Result<T>
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Team` is never used
[INFO] [stdout]  --> src/visitor.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Team {
[INFO] [stdout]   |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Player` is never constructed
[INFO] [stdout]   --> src/visitor.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Player {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PlayerVisitor` is never constructed
[INFO] [stdout]   --> src/visitor.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct PlayerVisitor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Field` is never used
[INFO] [stdout]   --> src/visitor.rs:69:6
[INFO] [stdout]    |
[INFO] [stdout] 69 | enum Field {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FieldVisitor` is never constructed
[INFO] [stdout]   --> src/visitor.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct FieldVisitor;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.66s
[INFO] running `Command { std: "docker" "inspect" "a12aca419369c74f53aec48103442ebc6483d269fe93e01c4e7ec4c2e6be58ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a12aca419369c74f53aec48103442ebc6483d269fe93e01c4e7ec4c2e6be58ba", kill_on_drop: false }`
[INFO] [stdout] a12aca419369c74f53aec48103442ebc6483d269fe93e01c4e7ec4c2e6be58ba