[INFO] cloning repository https://github.com/ntalbs/json_parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ntalbs/json_parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fntalbs%2Fjson_parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fntalbs%2Fjson_parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd472b721c991b0e800cd0d8e701932e2690537e
[INFO] testing ntalbs/json_parser against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fntalbs%2Fjson_parser" "/workspace/builds/worker-88/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-88/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ntalbs/json_parser on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ntalbs/json_parser
[INFO] finished tweaking git repo https://github.com/ntalbs/json_parser
[INFO] tweaked toml for git repo https://github.com/ntalbs/json_parser written to /workspace/builds/worker-88/source/Cargo.toml
[INFO] crate git repo https://github.com/ntalbs/json_parser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 041a461e6abd16bbdfc21b450001b7eaed8a471afa72d61b801f303578195126
[INFO] running `Command { std: "docker" "start" "-a" "041a461e6abd16bbdfc21b450001b7eaed8a471afa72d61b801f303578195126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "041a461e6abd16bbdfc21b450001b7eaed8a471afa72d61b801f303578195126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "041a461e6abd16bbdfc21b450001b7eaed8a471afa72d61b801f303578195126", kill_on_drop: false }`
[INFO] [stdout] 041a461e6abd16bbdfc21b450001b7eaed8a471afa72d61b801f303578195126
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 539e52a964a77c2585b4df832356c8a0a26ade25bebb03f6590b8f6ff2006e4a
[INFO] running `Command { std: "docker" "start" "-a" "539e52a964a77c2585b4df832356c8a0a26ade25bebb03f6590b8f6ff2006e4a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling json_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]   --> src/scanner.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pos`
[INFO] [stdout]   --> src/scanner.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pos: Pos,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "539e52a964a77c2585b4df832356c8a0a26ade25bebb03f6590b8f6ff2006e4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "539e52a964a77c2585b4df832356c8a0a26ade25bebb03f6590b8f6ff2006e4a", kill_on_drop: false }`
[INFO] [stdout] 539e52a964a77c2585b4df832356c8a0a26ade25bebb03f6590b8f6ff2006e4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26e29da2546b69dbbc6d6e81d1996811571cbe07cab50096c24018538bce7c79
[INFO] running `Command { std: "docker" "start" "-a" "26e29da2546b69dbbc6d6e81d1996811571cbe07cab50096c24018538bce7c79", kill_on_drop: false }`
[INFO] [stderr]    Compiling json_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]   --> src/scanner.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pos`
[INFO] [stdout]   --> src/scanner.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pos: Pos,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "26e29da2546b69dbbc6d6e81d1996811571cbe07cab50096c24018538bce7c79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26e29da2546b69dbbc6d6e81d1996811571cbe07cab50096c24018538bce7c79", kill_on_drop: false }`
[INFO] [stdout] 26e29da2546b69dbbc6d6e81d1996811571cbe07cab50096c24018538bce7c79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 597f45ba033a48f820854662968dd2b642875eb155a56387681240d2b38b5393
[INFO] running `Command { std: "docker" "start" "-a" "597f45ba033a48f820854662968dd2b642875eb155a56387681240d2b38b5393", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `message`
[INFO] [stderr]   --> src/scanner.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     message: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pos`
[INFO] [stderr]   --> src/scanner.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pos: Pos,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `json_parser` (bin "json_parser" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/json_parser-0526a25c27779eb9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "597f45ba033a48f820854662968dd2b642875eb155a56387681240d2b38b5393", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "597f45ba033a48f820854662968dd2b642875eb155a56387681240d2b38b5393", kill_on_drop: false }`
[INFO] [stdout] 597f45ba033a48f820854662968dd2b642875eb155a56387681240d2b38b5393