[INFO] cloning repository https://github.com/thepolytheist/toy-json
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thepolytheist/toy-json" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthepolytheist%2Ftoy-json", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthepolytheist%2Ftoy-json'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18f5697749d4732e4a0483a4b3469f71d0dde401
[INFO] checking thepolytheist/toy-json against master#cb06d12710575a0d7ff71d6fe108f3bcff4f9195 for pr-128425-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthepolytheist%2Ftoy-json" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thepolytheist/toy-json on toolchain cb06d12710575a0d7ff71d6fe108f3bcff4f9195
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thepolytheist/toy-json
[INFO] finished tweaking git repo https://github.com/thepolytheist/toy-json
[INFO] tweaked toml for git repo https://github.com/thepolytheist/toy-json written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/thepolytheist/toy-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" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af1c28a7bb64be423898d1670e4e5d98de07ab5c6312c86c2b6c4e36ec841ecc
[INFO] running `Command { std: "docker" "start" "-a" "af1c28a7bb64be423898d1670e4e5d98de07ab5c6312c86c2b6c4e36ec841ecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af1c28a7bb64be423898d1670e4e5d98de07ab5c6312c86c2b6c4e36ec841ecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af1c28a7bb64be423898d1670e4e5d98de07ab5c6312c86c2b6c4e36ec841ecc", kill_on_drop: false }`
[INFO] [stdout] af1c28a7bb64be423898d1670e4e5d98de07ab5c6312c86c2b6c4e36ec841ecc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b430c960ff35350351611d11d9caaff564a770c1cca6efb3bd526759342aaf18
[INFO] running `Command { std: "docker" "start" "-a" "b430c960ff35350351611d11d9caaff564a770c1cca6efb3bd526759342aaf18", kill_on_drop: false }`
[INFO] [stderr]     Checking toy-json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Number`, `Boolean`, and `Null` are never constructed
[INFO] [stdout]   --> src/parser/json_value.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum JsonValue {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     Number(usize),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     Null
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `JsonValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Number`, `Boolean`, and `Null` are never constructed
[INFO] [stdout]   --> src/parser/json_value.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum JsonValue {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     Number(usize),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     Null
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `JsonValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "b430c960ff35350351611d11d9caaff564a770c1cca6efb3bd526759342aaf18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b430c960ff35350351611d11d9caaff564a770c1cca6efb3bd526759342aaf18", kill_on_drop: false }`
[INFO] [stdout] b430c960ff35350351611d11d9caaff564a770c1cca6efb3bd526759342aaf18