[INFO] cloning repository https://github.com/elbart/jf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/elbart/jf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felbart%2Fjf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felbart%2Fjf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8847d70527843afd5cdc96b56203c97736d9a0c2
[INFO] checking elbart/jf against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felbart%2Fjf" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elbart/jf on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/elbart/jf
[INFO] finished tweaking git repo https://github.com/elbart/jf
[INFO] tweaked toml for git repo https://github.com/elbart/jf written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/elbart/jf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "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 itoa v0.4.1
[INFO] [stderr]   Downloaded num-traits v0.2.2
[INFO] [stderr]   Downloaded atty v0.2.8
[INFO] [stderr]   Downloaded serde v1.0.37
[INFO] [stderr]   Downloaded serde_json v1.0.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86ed7f00903a95db98cc5157bc32362319899f2e5b28da2f4563cd0419513d83
[INFO] running `Command { std: "docker" "start" "-a" "86ed7f00903a95db98cc5157bc32362319899f2e5b28da2f4563cd0419513d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86ed7f00903a95db98cc5157bc32362319899f2e5b28da2f4563cd0419513d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86ed7f00903a95db98cc5157bc32362319899f2e5b28da2f4563cd0419513d83", kill_on_drop: false }`
[INFO] [stdout] 86ed7f00903a95db98cc5157bc32362319899f2e5b28da2f4563cd0419513d83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a01b9246f1d9c32a574d5e1a1e299df5cf5ae81e6ced70314fab092d30b188e8
[INFO] running `Command { std: "docker" "start" "-a" "a01b9246f1d9c32a574d5e1a1e299df5cf5ae81e6ced70314fab092d30b188e8", kill_on_drop: false }`
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking serde v1.0.37
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking atty v0.2.8
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking serde_json v1.0.13
[INFO] [stderr]     Checking jf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:71:37
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn read_json_to_string(reader: &mut Read) -> Result<String, std::io::Error> {
[INFO] [stdout]    |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:71:37
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn read_json_to_string(reader: &mut Read) -> Result<String, std::io::Error> {
[INFO] [stdout]    |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.56s
[INFO] running `Command { std: "docker" "inspect" "a01b9246f1d9c32a574d5e1a1e299df5cf5ae81e6ced70314fab092d30b188e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a01b9246f1d9c32a574d5e1a1e299df5cf5ae81e6ced70314fab092d30b188e8", kill_on_drop: false }`
[INFO] [stdout] a01b9246f1d9c32a574d5e1a1e299df5cf5ae81e6ced70314fab092d30b188e8