[INFO] cloning repository https://github.com/jonstites/algorithms [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonstites/algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonstites%2Falgorithms", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonstites%2Falgorithms'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c6aa15346e30e184f4abbc97963fd7333aa066e6 [INFO] building jonstites/algorithms against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonstites%2Falgorithms" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jonstites/algorithms on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jonstites/algorithms [INFO] finished tweaking git repo https://github.com/jonstites/algorithms [INFO] tweaked toml for git repo https://github.com/jonstites/algorithms written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/jonstites/algorithms 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b7e1b539f76baeacf55a335f3ac58e413396b84cfde875ca29e302054fc50d8d [INFO] running `Command { std: "docker" "start" "-a" "b7e1b539f76baeacf55a335f3ac58e413396b84cfde875ca29e302054fc50d8d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b7e1b539f76baeacf55a335f3ac58e413396b84cfde875ca29e302054fc50d8d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b7e1b539f76baeacf55a335f3ac58e413396b84cfde875ca29e302054fc50d8d", kill_on_drop: false }` [INFO] [stdout] b7e1b539f76baeacf55a335f3ac58e413396b84cfde875ca29e302054fc50d8d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 8cad2832fc2b26a95d5cb05e87eaeb8dd815d805c7e264314dd7e9a2af681261 [INFO] running `Command { std: "docker" "start" "-a" "8cad2832fc2b26a95d5cb05e87eaeb8dd815d805c7e264314dd7e9a2af681261", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Compiling unicode-width v0.1.5 [INFO] [stderr] Compiling either v1.5.2 [INFO] [stderr] Compiling ansi_term v0.11.0 [INFO] [stderr] Compiling vec_map v0.8.1 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling itertools v0.8.0 [INFO] [stderr] Compiling atty v0.2.11 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling algorithms v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::iter` [INFO] [stdout] --> src/lib.rs:364:9 [INFO] [stdout] | [INFO] [stdout] 364 | use std::iter; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `head` [INFO] [stdout] --> src/lib.rs:271:17 [INFO] [stdout] | [INFO] [stdout] 271 | let head = match self.to_head() { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_head` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `nodes` is never read [INFO] [stdout] --> src/data.rs:501:13 [INFO] [stdout] | [INFO] [stdout] 500 | pub struct Graph { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 501 | nodes: Vec, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Trie` is never constructed [INFO] [stdout] --> src/data.rs:675:16 [INFO] [stdout] | [INFO] [stdout] 675 | struct Trie { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple associated items are never used [INFO] [stdout] --> src/data.rs:681:20 [INFO] [stdout] | [INFO] [stdout] 680 | impl Trie { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 681 | pub fn new() -> Trie { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 688 | pub fn contains(&self, t: &str) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 696 | pub fn contains_prefix(&self, t: &str) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 700 | fn child_matches(&self, t: &str) -> Option<&Trie> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 716 | pub fn add(&mut self, values: &str) { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 721 | fn add_chars(&mut self, values: &mut Chars) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 731 | fn add_char(&mut self, value: char) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 747 | fn set_complete(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `data` is never read [INFO] [stdout] --> src/lib.rs:210:9 [INFO] [stdout] | [INFO] [stdout] 209 | struct NodeData { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 210 | data: T, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `NodeData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/data.rs:58:21 [INFO] [stdout] | [INFO] [stdout] 58 | std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 58 | let _ = std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.03s [INFO] running `Command { std: "docker" "inspect" "8cad2832fc2b26a95d5cb05e87eaeb8dd815d805c7e264314dd7e9a2af681261", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8cad2832fc2b26a95d5cb05e87eaeb8dd815d805c7e264314dd7e9a2af681261", kill_on_drop: false }` [INFO] [stdout] 8cad2832fc2b26a95d5cb05e87eaeb8dd815d805c7e264314dd7e9a2af681261 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2a9e8aef676722602f4fe319a857ec9cb2dd3d294394003efbb2b25915842bb0 [INFO] running `Command { std: "docker" "start" "-a" "2a9e8aef676722602f4fe319a857ec9cb2dd3d294394003efbb2b25915842bb0", kill_on_drop: false }` [INFO] [stderr] Compiling algorithms v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::iter` [INFO] [stdout] --> src/lib.rs:364:9 [INFO] [stdout] | [INFO] [stdout] 364 | use std::iter; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `head` [INFO] [stdout] --> src/lib.rs:271:17 [INFO] [stdout] | [INFO] [stdout] 271 | let head = match self.to_head() { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_head` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `nodes` is never read [INFO] [stdout] --> src/data.rs:501:13 [INFO] [stdout] | [INFO] [stdout] 500 | pub struct Graph { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 501 | nodes: Vec, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Trie` is never constructed [INFO] [stdout] --> src/data.rs:675:16 [INFO] [stdout] | [INFO] [stdout] 675 | struct Trie { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple associated items are never used [INFO] [stdout] --> src/data.rs:681:20 [INFO] [stdout] | [INFO] [stdout] 680 | impl Trie { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 681 | pub fn new() -> Trie { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 688 | pub fn contains(&self, t: &str) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 696 | pub fn contains_prefix(&self, t: &str) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 700 | fn child_matches(&self, t: &str) -> Option<&Trie> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 716 | pub fn add(&mut self, values: &str) { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 721 | fn add_chars(&mut self, values: &mut Chars) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 731 | fn add_char(&mut self, value: char) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 747 | fn set_complete(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `data` is never read [INFO] [stdout] --> src/lib.rs:210:9 [INFO] [stdout] | [INFO] [stdout] 209 | struct NodeData { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 210 | data: T, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `NodeData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/data.rs:58:21 [INFO] [stdout] | [INFO] [stdout] 58 | std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 58 | let _ = std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter` [INFO] [stdout] --> src/lib.rs:364:9 [INFO] [stdout] | [INFO] [stdout] 364 | use std::iter; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `head` [INFO] [stdout] --> src/lib.rs:271:17 [INFO] [stdout] | [INFO] [stdout] 271 | let head = match self.to_head() { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_head` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `nodes` is never read [INFO] [stdout] --> src/data.rs:501:13 [INFO] [stdout] | [INFO] [stdout] 500 | pub struct Graph { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 501 | nodes: Vec, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `data` is never read [INFO] [stdout] --> src/lib.rs:210:9 [INFO] [stdout] | [INFO] [stdout] 209 | struct NodeData { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 210 | data: T, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `NodeData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/data.rs:58:21 [INFO] [stdout] | [INFO] [stdout] 58 | std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 58 | let _ = std::mem::replace(&mut self.data, data.into_boxed_slice()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lib.rs:346:13 [INFO] [stdout] | [INFO] [stdout] 346 | graph.add_edge(a, b); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 346 | let _ = graph.add_edge(a, b); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lib.rs:351:13 [INFO] [stdout] | [INFO] [stdout] 351 | graph.add_edge(c, d); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 351 | let _ = graph.add_edge(c, d); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lib.rs:352:13 [INFO] [stdout] | [INFO] [stdout] 352 | graph.add_edge(d, c); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 352 | let _ = graph.add_edge(d, c); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.73s [INFO] running `Command { std: "docker" "inspect" "2a9e8aef676722602f4fe319a857ec9cb2dd3d294394003efbb2b25915842bb0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2a9e8aef676722602f4fe319a857ec9cb2dd3d294394003efbb2b25915842bb0", kill_on_drop: false }` [INFO] [stdout] 2a9e8aef676722602f4fe319a857ec9cb2dd3d294394003efbb2b25915842bb0