[INFO] cloning repository https://github.com/emmanuel2406/Rust_projects-weak_ref
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emmanuel2406/Rust_projects-weak_ref" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmanuel2406%2FRust_projects-weak_ref", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmanuel2406%2FRust_projects-weak_ref'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e5767a98410dce80cfb14ad27b06e97d9d041c9a
[INFO] testing emmanuel2406/Rust_projects-weak_ref against try#17092ad00ed8fe1e7f81a7e38238ff70779034b1 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmanuel2406%2FRust_projects-weak_ref" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emmanuel2406/Rust_projects-weak_ref on toolchain 17092ad00ed8fe1e7f81a7e38238ff70779034b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emmanuel2406/Rust_projects-weak_ref
[INFO] finished tweaking git repo https://github.com/emmanuel2406/Rust_projects-weak_ref
[INFO] tweaked toml for git repo https://github.com/emmanuel2406/Rust_projects-weak_ref written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/emmanuel2406/Rust_projects-weak_ref 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" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 473de7f9a508e723ccca1f65b73a45fb32258059f72c5a86e33c74538787da95
[INFO] running `Command { std: "docker" "start" "-a" "473de7f9a508e723ccca1f65b73a45fb32258059f72c5a86e33c74538787da95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "473de7f9a508e723ccca1f65b73a45fb32258059f72c5a86e33c74538787da95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "473de7f9a508e723ccca1f65b73a45fb32258059f72c5a86e33c74538787da95", kill_on_drop: false }`
[INFO] [stdout] 473de7f9a508e723ccca1f65b73a45fb32258059f72c5a86e33c74538787da95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3af303fc9002f467463a6e672fd9933d2bb4fbfc6b006e4bfb2493e03c52942
[INFO] running `Command { std: "docker" "start" "-a" "f3af303fc9002f467463a6e672fd9933d2bb4fbfc6b006e4bfb2493e03c52942", kill_on_drop: false }`
[INFO] [stderr]    Compiling weak_ref v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is 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 0.23s
[INFO] running `Command { std: "docker" "inspect" "f3af303fc9002f467463a6e672fd9933d2bb4fbfc6b006e4bfb2493e03c52942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3af303fc9002f467463a6e672fd9933d2bb4fbfc6b006e4bfb2493e03c52942", kill_on_drop: false }`
[INFO] [stdout] f3af303fc9002f467463a6e672fd9933d2bb4fbfc6b006e4bfb2493e03c52942
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95a3f77b00144ae976d529d8e3d57328b45b321f9cb372e06b75801ee4f52972
[INFO] running `Command { std: "docker" "start" "-a" "95a3f77b00144ae976d529d8e3d57328b45b321f9cb372e06b75801ee4f52972", kill_on_drop: false }`
[INFO] [stderr]    Compiling weak_ref v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "95a3f77b00144ae976d529d8e3d57328b45b321f9cb372e06b75801ee4f52972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95a3f77b00144ae976d529d8e3d57328b45b321f9cb372e06b75801ee4f52972", kill_on_drop: false }`
[INFO] [stdout] 95a3f77b00144ae976d529d8e3d57328b45b321f9cb372e06b75801ee4f52972
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2d8c249296cbe09654322d676026609954f1e45a0a7c1ad03dfd3622205c245a
[INFO] running `Command { std: "docker" "start" "-a" "2d8c249296cbe09654322d676026609954f1e45a0a7c1ad03dfd3622205c245a", kill_on_drop: false }`
[INFO] [stderr] warning: fields `value` and `children` are never read
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Node {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 6 |     value: i32,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stderr] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `weak_ref` (bin "weak_ref" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/weak_ref-041dec0593211138)
[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" "2d8c249296cbe09654322d676026609954f1e45a0a7c1ad03dfd3622205c245a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d8c249296cbe09654322d676026609954f1e45a0a7c1ad03dfd3622205c245a", kill_on_drop: false }`
[INFO] [stdout] 2d8c249296cbe09654322d676026609954f1e45a0a7c1ad03dfd3622205c245a