[INFO] updating cached repository https://github.com/shanlihou/rust_play [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] [stderr] From https://github.com/shanlihou/rust_play [INFO] [stderr] 894f4bb..33eb7c5 master -> master [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 33eb7c50fa30d4117c79790fd72be5ce7ac4e699 [INFO] checking shanlihou/rust_play against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshanlihou%2Frust_play" "/workspace/builds/worker-4/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/shanlihou/rust_play on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c [INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/shanlihou/rust_play [INFO] finished tweaking git repo https://github.com/shanlihou/rust_play [INFO] tweaked toml for git repo https://github.com/shanlihou/rust_play written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/shanlihou/rust_play already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] cf8e6dc31c974be89010ec9c90bcb960afd764144e6497d5bd2a1b93298b6f73 [INFO] running `"docker" "start" "-a" "cf8e6dc31c974be89010ec9c90bcb960afd764144e6497d5bd2a1b93298b6f73"` [INFO] [stderr] Checking just_test v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: value assigned to `c` is never read [INFO] [stderr] --> src/question_149.rs:33:17 [INFO] [stderr] | [INFO] [stderr] 33 | let mut c = 0; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/question_149.rs:61:13 [INFO] [stderr] | [INFO] [stderr] 61 | let a:HashMap = HashMap::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let mut ret = str_s[2..(str_s.len() - 2)].split("],["); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `c` is never read [INFO] [stderr] --> src/question_149.rs:33:17 [INFO] [stderr] | [INFO] [stderr] 33 | let mut c = 0; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/question_149.rs:61:13 [INFO] [stderr] | [INFO] [stderr] 61 | let a:HashMap = HashMap::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `pop` [INFO] [stderr] --> src/stack.rs:30:5 [INFO] [stderr] | [INFO] [stderr] 30 | fn pop(&mut self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Point` [INFO] [stderr] --> src/question_149.rs:7:8 [INFO] [stderr] | [INFO] [stderr] 7 | struct Point<'a> { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let mut ret = str_s[2..(str_s.len() - 2)].split("],["); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `pop` [INFO] [stderr] --> src/stack.rs:30:5 [INFO] [stderr] | [INFO] [stderr] 30 | fn pop(&mut self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Point` [INFO] [stderr] --> src/question_149.rs:7:8 [INFO] [stderr] | [INFO] [stderr] 7 | struct Point<'a> { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.38s [INFO] running `"docker" "inspect" "cf8e6dc31c974be89010ec9c90bcb960afd764144e6497d5bd2a1b93298b6f73"` [INFO] running `"docker" "rm" "-f" "cf8e6dc31c974be89010ec9c90bcb960afd764144e6497d5bd2a1b93298b6f73"` [INFO] [stdout] cf8e6dc31c974be89010ec9c90bcb960afd764144e6497d5bd2a1b93298b6f73