[INFO] cloning repository https://github.com/DavidTimms/rust-json-pretty-printer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DavidTimms/rust-json-pretty-printer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidTimms%2Frust-json-pretty-printer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidTimms%2Frust-json-pretty-printer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b59ac075979f1ad69e4a95cba61bea3f2e53ce61
[INFO] building DavidTimms/rust-json-pretty-printer against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidTimms%2Frust-json-pretty-printer" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DavidTimms/rust-json-pretty-printer on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DavidTimms/rust-json-pretty-printer
[INFO] finished tweaking git repo https://github.com/DavidTimms/rust-json-pretty-printer
[INFO] tweaked toml for git repo https://github.com/DavidTimms/rust-json-pretty-printer written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DavidTimms/rust-json-pretty-printer 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3d38e259b447c4be55f4a743ef69ab94117fc0e4bf8616a3227a63201192e3b
[INFO] running `Command { std: "docker" "start" "-a" "d3d38e259b447c4be55f4a743ef69ab94117fc0e4bf8616a3227a63201192e3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3d38e259b447c4be55f4a743ef69ab94117fc0e4bf8616a3227a63201192e3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3d38e259b447c4be55f4a743ef69ab94117fc0e4bf8616a3227a63201192e3b", kill_on_drop: false }`
[INFO] [stdout] d3d38e259b447c4be55f4a743ef69ab94117fc0e4bf8616a3227a63201192e3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19ebcc3f453c6dfb97fb9cea7b97741c1ac9f5705f5e370b666a91ffbec40b9b
[INFO] running `Command { std: "docker" "start" "-a" "19ebcc3f453c6dfb97fb9cea7b97741c1ac9f5705f5e370b666a91ffbec40b9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling json_pretty_printer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `array`, `object`, `get`, and `set` are never used
[INFO] [stdout]   --> src/ast.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Json {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     pub fn array() -> Json {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn object() -> Json {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn get(&self, property: &str) -> Option<&Json> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn set(self, property: &str, value: impl ToJson) -> Json {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `json_to_string` is never used
[INFO] [stdout]   --> src/printer.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn json_to_string(value: &Json, indent: u64) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "19ebcc3f453c6dfb97fb9cea7b97741c1ac9f5705f5e370b666a91ffbec40b9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19ebcc3f453c6dfb97fb9cea7b97741c1ac9f5705f5e370b666a91ffbec40b9b", kill_on_drop: false }`
[INFO] [stdout] 19ebcc3f453c6dfb97fb9cea7b97741c1ac9f5705f5e370b666a91ffbec40b9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0078e6cc90eee1f6ac3eef44a806a7f4838ea0c38c92a2d360e45c7458b67b02
[INFO] running `Command { std: "docker" "start" "-a" "0078e6cc90eee1f6ac3eef44a806a7f4838ea0c38c92a2d360e45c7458b67b02", kill_on_drop: false }`
[INFO] [stderr]    Compiling json_pretty_printer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "0078e6cc90eee1f6ac3eef44a806a7f4838ea0c38c92a2d360e45c7458b67b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0078e6cc90eee1f6ac3eef44a806a7f4838ea0c38c92a2d360e45c7458b67b02", kill_on_drop: false }`
[INFO] [stdout] 0078e6cc90eee1f6ac3eef44a806a7f4838ea0c38c92a2d360e45c7458b67b02