[INFO] cloning repository https://github.com/Yunichie/learn-linkedlist-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yunichie/learn-linkedlist-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYunichie%2Flearn-linkedlist-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYunichie%2Flearn-linkedlist-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 72048242f67ff81061516a32debf5086e28bb849 [INFO] testing Yunichie/learn-linkedlist-rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYunichie%2Flearn-linkedlist-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Yunichie/learn-linkedlist-rust [INFO] finished tweaking git repo https://github.com/Yunichie/learn-linkedlist-rust [INFO] tweaked toml for git repo https://github.com/Yunichie/learn-linkedlist-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Yunichie/learn-linkedlist-rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Yunichie/learn-linkedlist-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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "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 [ERROR] error running command: no output for 300 seconds [INFO] testing Yunichie/learn-linkedlist-rust against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYunichie%2Flearn-linkedlist-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Yunichie/learn-linkedlist-rust [INFO] finished tweaking git repo https://github.com/Yunichie/learn-linkedlist-rust [INFO] tweaked toml for git repo https://github.com/Yunichie/learn-linkedlist-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Yunichie/learn-linkedlist-rust on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Yunichie/learn-linkedlist-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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] beec2f82ca69a9b2794416133229806778acadf22a8335ac0618050a6d72338a [INFO] running `Command { std: "docker" "start" "-a" "beec2f82ca69a9b2794416133229806778acadf22a8335ac0618050a6d72338a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "beec2f82ca69a9b2794416133229806778acadf22a8335ac0618050a6d72338a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "beec2f82ca69a9b2794416133229806778acadf22a8335ac0618050a6d72338a", kill_on_drop: false }` [INFO] [stdout] beec2f82ca69a9b2794416133229806778acadf22a8335ac0618050a6d72338a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0196f815fff72bdf68c7e13725afc39c2fa0611ff851f4d1b254eaf1d64473ae [INFO] running `Command { std: "docker" "start" "-a" "0196f815fff72bdf68c7e13725afc39c2fa0611ff851f4d1b254eaf1d64473ae", kill_on_drop: false }` [INFO] [stderr] Compiling linkedlist v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Debug` and `Display` [INFO] [stdout] --> src/main.rs:1:16 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Debug, Display}; [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: `data` [INFO] [stdout] --> src/linkedlist/linkedlist.rs:132:30 [INFO] [stdout] | [INFO] [stdout] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/linkedlist/linkedlist.rs:136:33 [INFO] [stdout] | [INFO] [stdout] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `len` is never used [INFO] [stdout] --> src/linkedlist/linkedlist.rs:62:12 [INFO] [stdout] | [INFO] [stdout] 49 | impl LinkedList { [INFO] [stdout] | --------------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 62 | pub fn len(&self) -> usize { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `remove`, `remove_at`, `peek_front`, and `peek_back` are never used [INFO] [stdout] --> src/linkedlist/linkedlist.rs:132:12 [INFO] [stdout] | [INFO] [stdout] 67 | impl LinkedList { [INFO] [stdout] | ---------------------------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 140 | pub fn peek_front(&self) -> Option { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 146 | pub fn peek_back(&self) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s [INFO] running `Command { std: "docker" "inspect" "0196f815fff72bdf68c7e13725afc39c2fa0611ff851f4d1b254eaf1d64473ae", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0196f815fff72bdf68c7e13725afc39c2fa0611ff851f4d1b254eaf1d64473ae", kill_on_drop: false }` [INFO] [stdout] 0196f815fff72bdf68c7e13725afc39c2fa0611ff851f4d1b254eaf1d64473ae [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 913db5d25baf672cc410dbade90fcf6141f86926d8f5727c63fa7147b335ffab [INFO] running `Command { std: "docker" "start" "-a" "913db5d25baf672cc410dbade90fcf6141f86926d8f5727c63fa7147b335ffab", kill_on_drop: false }` [INFO] [stderr] Compiling linkedlist v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Debug` and `Display` [INFO] [stdout] --> src/main.rs:1:16 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Debug, Display}; [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: `data` [INFO] [stdout] --> src/linkedlist/linkedlist.rs:132:30 [INFO] [stdout] | [INFO] [stdout] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/linkedlist/linkedlist.rs:136:33 [INFO] [stdout] | [INFO] [stdout] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `len` is never used [INFO] [stdout] --> src/linkedlist/linkedlist.rs:62:12 [INFO] [stdout] | [INFO] [stdout] 49 | impl LinkedList { [INFO] [stdout] | --------------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 62 | pub fn len(&self) -> usize { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `remove`, `remove_at`, `peek_front`, and `peek_back` are never used [INFO] [stdout] --> src/linkedlist/linkedlist.rs:132:12 [INFO] [stdout] | [INFO] [stdout] 67 | impl LinkedList { [INFO] [stdout] | ---------------------------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 140 | pub fn peek_front(&self) -> Option { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 146 | pub fn peek_back(&self) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s [INFO] running `Command { std: "docker" "inspect" "913db5d25baf672cc410dbade90fcf6141f86926d8f5727c63fa7147b335ffab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "913db5d25baf672cc410dbade90fcf6141f86926d8f5727c63fa7147b335ffab", kill_on_drop: false }` [INFO] [stdout] 913db5d25baf672cc410dbade90fcf6141f86926d8f5727c63fa7147b335ffab [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 8f15ac8792e1aec718438c0ed6a29a1171402cb709044a92045fb336f9f1e9b9 [INFO] running `Command { std: "docker" "start" "-a" "8f15ac8792e1aec718438c0ed6a29a1171402cb709044a92045fb336f9f1e9b9", kill_on_drop: false }` [INFO] [stderr] warning: unused imports: `Debug` and `Display` [INFO] [stderr] --> src/main.rs:1:16 [INFO] [stderr] | [INFO] [stderr] 1 | use std::fmt::{Debug, Display}; [INFO] [stderr] | ^^^^^ ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/linkedlist/linkedlist.rs:132:30 [INFO] [stderr] | [INFO] [stderr] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `index` [INFO] [stderr] --> src/linkedlist/linkedlist.rs:136:33 [INFO] [stderr] | [INFO] [stderr] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stderr] [INFO] [stderr] warning: method `len` is never used [INFO] [stderr] --> src/linkedlist/linkedlist.rs:62:12 [INFO] [stderr] | [INFO] [stderr] 49 | impl LinkedList { [INFO] [stderr] | --------------------- method in this implementation [INFO] [stderr] ... [INFO] [stderr] 62 | pub fn len(&self) -> usize { [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: methods `remove`, `remove_at`, `peek_front`, and `peek_back` are never used [INFO] [stderr] --> src/linkedlist/linkedlist.rs:132:12 [INFO] [stderr] | [INFO] [stderr] 67 | impl LinkedList { [INFO] [stderr] | ---------------------------------------------- methods in this implementation [INFO] [stderr] ... [INFO] [stderr] 132 | pub fn remove(&mut self, data: T) -> Option { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] ... [INFO] [stderr] 136 | pub fn remove_at(&mut self, index: usize) -> Option { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] ... [INFO] [stderr] 140 | pub fn peek_front(&self) -> Option { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] ... [INFO] [stderr] 146 | pub fn peek_back(&self) -> Option { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `linkedlist` (bin "linkedlist" test) generated 5 warnings (run `cargo fix --bin "linkedlist" -p linkedlist --tests` to apply 3 suggestions) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/linkedlist-f1e7a24f09d4aa2d) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "8f15ac8792e1aec718438c0ed6a29a1171402cb709044a92045fb336f9f1e9b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8f15ac8792e1aec718438c0ed6a29a1171402cb709044a92045fb336f9f1e9b9", kill_on_drop: false }` [INFO] [stdout] 8f15ac8792e1aec718438c0ed6a29a1171402cb709044a92045fb336f9f1e9b9