[INFO] cloning repository https://github.com/Cupnfish/my-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/Cupnfish/my-leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCupnfish%2Fmy-leetcode-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCupnfish%2Fmy-leetcode-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 32002f7714d5be3b547d0280955407e3f02fc1f1 [INFO] checking Cupnfish/my-leetcode-rust against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCupnfish%2Fmy-leetcode-rust" "/workspace/builds/worker-12/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Cupnfish/my-leetcode-rust on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Cupnfish/my-leetcode-rust [INFO] finished tweaking git repo https://github.com/Cupnfish/my-leetcode-rust [INFO] tweaked toml for git repo https://github.com/Cupnfish/my-leetcode-rust written to /workspace/builds/worker-12/source/Cargo.toml [INFO] crate git repo https://github.com/Cupnfish/my-leetcode-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e18e8f3defff2e2cd2b7a64d1e24d010073d67851d1cabbbfc1b52ac021862e9 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "e18e8f3defff2e2cd2b7a64d1e24d010073d67851d1cabbbfc1b52ac021862e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e18e8f3defff2e2cd2b7a64d1e24d010073d67851d1cabbbfc1b52ac021862e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e18e8f3defff2e2cd2b7a64d1e24d010073d67851d1cabbbfc1b52ac021862e9", kill_on_drop: false }` [INFO] [stdout] e18e8f3defff2e2cd2b7a64d1e24d010073d67851d1cabbbfc1b52ac021862e9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d9a52f0abf1a238bcaca8b1e5d7194c10f10e4aab16d37eeeb102e90638a54b9 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "d9a52f0abf1a238bcaca8b1e5d7194c10f10e4aab16d37eeeb102e90638a54b9", kill_on_drop: false }` [INFO] [stderr] Checking leetcode-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::iter::Zip` [INFO] [stdout] --> src/random/day2.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | use std::iter::Zip; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `hash` [INFO] [stdout] --> src/random/day3.rs:2:52 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{cell::RefCell, collections::HashMap, hash, rc::Rc}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter::Zip` [INFO] [stdout] --> src/random/day2.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | use std::iter::Zip; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `hash` [INFO] [stdout] --> src/random/day3.rs:2:52 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{cell::RefCell, collections::HashMap, hash, rc::Rc}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature 'map_first_last' [INFO] [stdout] --> src/random/day3.rs:103:41 [INFO] [stdout] | [INFO] [stdout] 103 | if let Some(mut entry) = counts.first_entry() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #62924 for more information [INFO] [stdout] = help: add `#![feature(map_first_last)]` to the crate attributes to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature 'map_first_last' [INFO] [stdout] --> src/random/day3.rs:103:41 [INFO] [stdout] | [INFO] [stdout] 103 | if let Some(mut entry) = counts.first_entry() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #62924 for more information [INFO] [stdout] = help: add `#![feature(map_first_last)]` to the crate attributes to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] error: could not compile `leetcode-rust` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "d9a52f0abf1a238bcaca8b1e5d7194c10f10e4aab16d37eeeb102e90638a54b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d9a52f0abf1a238bcaca8b1e5d7194c10f10e4aab16d37eeeb102e90638a54b9", kill_on_drop: false }` [INFO] [stdout] d9a52f0abf1a238bcaca8b1e5d7194c10f10e4aab16d37eeeb102e90638a54b9