[INFO] cloning repository https://github.com/tudorpaisa/many_linked_lists [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tudorpaisa/many_linked_lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftudorpaisa%2Fmany_linked_lists", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftudorpaisa%2Fmany_linked_lists'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c7ae5dea96f1362c218240906e5a967d508958f5 [INFO] checking tudorpaisa/many_linked_lists against try#2b41547e41f63ea0ca9cb25417ddd569b19e6a50 for pr-134273 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftudorpaisa%2Fmany_linked_lists" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tudorpaisa/many_linked_lists on toolchain 2b41547e41f63ea0ca9cb25417ddd569b19e6a50 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/tudorpaisa/many_linked_lists [INFO] finished tweaking git repo https://github.com/tudorpaisa/many_linked_lists [INFO] tweaked toml for git repo https://github.com/tudorpaisa/many_linked_lists written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/tudorpaisa/many_linked_lists 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" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "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-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 74fb48ada1e8f2e2924c4eacb06925167684e53df0668e9c8ab780f310872226 [INFO] running `Command { std: "docker" "start" "-a" "74fb48ada1e8f2e2924c4eacb06925167684e53df0668e9c8ab780f310872226", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "74fb48ada1e8f2e2924c4eacb06925167684e53df0668e9c8ab780f310872226", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "74fb48ada1e8f2e2924c4eacb06925167684e53df0668e9c8ab780f310872226", kill_on_drop: false }` [INFO] [stdout] 74fb48ada1e8f2e2924c4eacb06925167684e53df0668e9c8ab780f310872226 [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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 39ed2935a665a8e53750da0e69722a5eae1b0a1d42e224ca2d48f06efd5d6eac [INFO] running `Command { std: "docker" "start" "-a" "39ed2935a665a8e53750da0e69722a5eae1b0a1d42e224ca2d48f06efd5d6eac", kill_on_drop: false }` [INFO] [stderr] Checking many_linked_lists v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/fifth.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let mut new_tail = Box::into_raw(Box::new(Node { [INFO] [stdout] | ----^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `pop_node` is never used [INFO] [stdout] --> src/first.rs:42:8 [INFO] [stdout] | [INFO] [stdout] 18 | impl List { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 42 | fn pop_node(&mut self) -> Link { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `pop_node`, `peek`, and `peek_mut` are never used [INFO] [stdout] --> src/second.rs:36:8 [INFO] [stdout] | [INFO] [stdout] 15 | impl List { [INFO] [stdout] | --------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 36 | fn pop_node(&mut self) -> Link { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 43 | fn peek(&self) -> Option<&T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 49 | fn peek_mut(&mut self) -> Option<&mut T> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `into_iter` is never used [INFO] [stdout] --> src/second.rs:60:8 [INFO] [stdout] | [INFO] [stdout] 59 | impl List { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] 60 | fn into_iter(self) -> IntoIter { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `iter` is never used [INFO] [stdout] --> src/second.rs:83:8 [INFO] [stdout] | [INFO] [stdout] 79 | impl List { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 83 | fn iter<'a>(&'a self) -> Iter<'a, T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaun6nMh" [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `many_linked_lists` (lib) due to 1 previous error; 5 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/fifth.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let mut new_tail = Box::into_raw(Box::new(Node { [INFO] [stdout] | ----^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `pop_node` is never used [INFO] [stdout] --> src/first.rs:42:8 [INFO] [stdout] | [INFO] [stdout] 18 | impl List { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 42 | fn pop_node(&mut self) -> Link { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `pop_node` is never used [INFO] [stdout] --> src/second.rs:36:8 [INFO] [stdout] | [INFO] [stdout] 15 | impl List { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 36 | fn pop_node(&mut self) -> Link { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "39ed2935a665a8e53750da0e69722a5eae1b0a1d42e224ca2d48f06efd5d6eac", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "39ed2935a665a8e53750da0e69722a5eae1b0a1d42e224ca2d48f06efd5d6eac", kill_on_drop: false }` [INFO] [stdout] 39ed2935a665a8e53750da0e69722a5eae1b0a1d42e224ca2d48f06efd5d6eac