[INFO] cloning repository https://github.com/Ryan1202/myrbtree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ryan1202/myrbtree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1202%2Fmyrbtree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1202%2Fmyrbtree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c71c4fd0596c629036fd2058bd29749605514b1
[INFO] checking Ryan1202/myrbtree against try#f70ee28831acc074c109afab32d287057c3eca46 for pr-149389
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1202%2Fmyrbtree" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ryan1202/myrbtree
[INFO] finished tweaking git repo https://github.com/Ryan1202/myrbtree
[INFO] tweaked toml for git repo https://github.com/Ryan1202/myrbtree written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ryan1202/myrbtree on toolchain f70ee28831acc074c109afab32d287057c3eca46
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ryan1202/myrbtree 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" "+f70ee28831acc074c109afab32d287057c3eca46" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking Ryan1202/myrbtree against try#f70ee28831acc074c109afab32d287057c3eca46 for pr-149389
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1202%2Fmyrbtree" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ryan1202/myrbtree
[INFO] finished tweaking git repo https://github.com/Ryan1202/myrbtree
[INFO] tweaked toml for git repo https://github.com/Ryan1202/myrbtree written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ryan1202/myrbtree on toolchain f70ee28831acc074c109afab32d287057c3eca46
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ryan1202/myrbtree 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" "+f70ee28831acc074c109afab32d287057c3eca46" "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 rbtree v0.2.0
[INFO] [stderr]   Downloaded avltree v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95db803ad8f9c9bd5f5a917b275c40aa95bf5fd6cbbbd4e4f0054b825a8b02e3
[INFO] running `Command { std: "docker" "start" "-a" "95db803ad8f9c9bd5f5a917b275c40aa95bf5fd6cbbbd4e4f0054b825a8b02e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95db803ad8f9c9bd5f5a917b275c40aa95bf5fd6cbbbd4e4f0054b825a8b02e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95db803ad8f9c9bd5f5a917b275c40aa95bf5fd6cbbbd4e4f0054b825a8b02e3", kill_on_drop: false }`
[INFO] [stdout] 95db803ad8f9c9bd5f5a917b275c40aa95bf5fd6cbbbd4e4f0054b825a8b02e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f67b78106232144e6b1052249261a8d640d8ac8f8253b266fcc2e728d6d4e794
[INFO] running `Command { std: "docker" "start" "-a" "f67b78106232144e6b1052249261a8d640d8ac8f8253b266fcc2e728d6d4e794", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rbtree v0.2.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking avltree v0.1.0
[INFO] [stderr]     Checking my_rbtree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rc::Weak`
[INFO] [stdout]  --> src/my_rbtree.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Display, ptr::NonNull, rc::Weak};
[INFO] [stdout]   |                                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rc::Weak`
[INFO] [stdout]  --> src/my_rbtree.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Display, ptr::NonNull, rc::Weak};
[INFO] [stdout]   |                                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_left`
[INFO] [stdout]    --> src/my_rbtree.rs:788:22
[INFO] [stdout]     |
[INFO] [stdout] 788 |                 let (child_left, child_right) = unsafe { ((*child_ptr).left, (*child_ptr).right) };
[INFO] [stdout]     |                      ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_left`
[INFO] [stdout]    --> src/my_rbtree.rs:788:22
[INFO] [stdout]     |
[INFO] [stdout] 788 |                 let (child_left, child_right) = unsafe { ((*child_ptr).left, (*child_ptr).right) };
[INFO] [stdout]     |                      ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/my_rbtree.rs:943:14
[INFO] [stdout]     |
[INFO] [stdout] 943 |         for (i, level) in matrix.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/my_rbtree.rs:943:14
[INFO] [stdout]     |
[INFO] [stdout] 943 |         for (i, level) in matrix.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "f67b78106232144e6b1052249261a8d640d8ac8f8253b266fcc2e728d6d4e794", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f67b78106232144e6b1052249261a8d640d8ac8f8253b266fcc2e728d6d4e794", kill_on_drop: false }`
[INFO] [stdout] f67b78106232144e6b1052249261a8d640d8ac8f8253b266fcc2e728d6d4e794