[INFO] cloning repository https://github.com/rylynchen/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rylynchen/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frylynchen%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frylynchen%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0ea50f96e1d8a7a410028dd7178137d678d0aea
[INFO] checking rylynchen/leetcode-rust against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frylynchen%2Fleetcode-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rylynchen/leetcode-rust on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rylynchen/leetcode-rust
[INFO] finished tweaking git repo https://github.com/rylynchen/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/rylynchen/leetcode-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rylynchen/leetcode-rust 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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking rylynchen/leetcode-rust against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frylynchen%2Fleetcode-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rylynchen/leetcode-rust on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rylynchen/leetcode-rust
[INFO] finished tweaking git repo https://github.com/rylynchen/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/rylynchen/leetcode-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rylynchen/leetcode-rust 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" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ced0f8bed214db3ffd7157f40732ad907a8c35af80b9aff1fbf7843131201a2
[INFO] running `Command { std: "docker" "start" "-a" "8ced0f8bed214db3ffd7157f40732ad907a8c35af80b9aff1fbf7843131201a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ced0f8bed214db3ffd7157f40732ad907a8c35af80b9aff1fbf7843131201a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ced0f8bed214db3ffd7157f40732ad907a8c35af80b9aff1fbf7843131201a2", kill_on_drop: false }`
[INFO] [stdout] 8ced0f8bed214db3ffd7157f40732ad907a8c35af80b9aff1fbf7843131201a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 07b3947d2681a83ea94c32eddc61b5d634c72dd78961187a3b590236517d3271
[INFO] running `Command { std: "docker" "start" "-a" "07b3947d2681a83ea94c32eddc61b5d634c72dd78961187a3b590236517d3271", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:32:34
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(node.borrow().val));
[INFO] [stdout]    |                                  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(<Rc<RefCell<TreeNode>> as Borrow<Borrowed>>::borrow(&node).val));
[INFO] [stdout]    |                             +++++++++++++++++++++++++++++++++++++++++++++++++++++    ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0609]: no field `val` on type `&_`
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:32:43
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(node.borrow().val));
[INFO] [stdout]    |                                           ^^^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0609]: no field `val` on type `&Option<Rc<RefCell<TreeNode>>>`
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |     stack.push(root.borrow().val);
[INFO] [stdout]    |                              ^^^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:32:34
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(node.borrow().val));
[INFO] [stdout]    |                                  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(<Rc<RefCell<TreeNode>> as Borrow<Borrowed>>::borrow(&node).val));
[INFO] [stdout]    |                             +++++++++++++++++++++++++++++++++++++++++++++++++++++    ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0609]: no field `val` on type `&_`
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:32:43
[INFO] [stdout]    |
[INFO] [stdout] 32 |             stack.push(Some(node.borrow().val));
[INFO] [stdout]    |                                           ^^^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0609.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error[E0609]: no field `val` on type `&Option<Rc<RefCell<TreeNode>>>`
[INFO] [stdout]   --> src/bin/144_binary-tree-preorder-traversal.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |     stack.push(root.borrow().val);
[INFO] [stdout]    |                              ^^^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0609.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `leetcode` (bin "144_binary-tree-preorder-traversal") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `leetcode` (bin "144_binary-tree-preorder-traversal" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "07b3947d2681a83ea94c32eddc61b5d634c72dd78961187a3b590236517d3271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07b3947d2681a83ea94c32eddc61b5d634c72dd78961187a3b590236517d3271", kill_on_drop: false }`
[INFO] [stdout] 07b3947d2681a83ea94c32eddc61b5d634c72dd78961187a3b590236517d3271