[INFO] cloning repository https://github.com/christheblog/graph-commands
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christheblog/graph-commands" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristheblog%2Fgraph-commands", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristheblog%2Fgraph-commands'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8861930c516adaa8c85ca1628309ded80f9d7d79
[INFO] checking christheblog/graph-commands against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristheblog%2Fgraph-commands" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/christheblog/graph-commands on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/christheblog/graph-commands
[INFO] finished tweaking git repo https://github.com/christheblog/graph-commands
[INFO] tweaked toml for git repo https://github.com/christheblog/graph-commands written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/christheblog/graph-commands 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6425d6176803776f4b2f4d7ba46a50fc712e97abd39179ac167036a42ccbec6a
[INFO] running `Command { std: "docker" "start" "-a" "6425d6176803776f4b2f4d7ba46a50fc712e97abd39179ac167036a42ccbec6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6425d6176803776f4b2f4d7ba46a50fc712e97abd39179ac167036a42ccbec6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6425d6176803776f4b2f4d7ba46a50fc712e97abd39179ac167036a42ccbec6a", kill_on_drop: false }`
[INFO] [stdout] 6425d6176803776f4b2f4d7ba46a50fc712e97abd39179ac167036a42ccbec6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78dffa11a72037866ebd81920ac9c87391634d50e197645d2da7532fbd13aed2
[INFO] running `Command { std: "docker" "start" "-a" "78dffa11a72037866ebd81920ac9c87391634d50e197645d2da7532fbd13aed2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.3.5
[INFO] [stderr]     Checking gc-core v0.1.0 (/opt/rustwide/workdir/core)
[INFO] [stdout] warning: the item `Edge` is imported redundantly
[INFO] [stdout]  --> core/src/directed_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::graph::Edge;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 | use crate::graph::*;
[INFO] [stdout]   |     --------------- the item `Edge` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> core/src/algorithm/hamiltonian.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     use std::iter::Iterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DirectedGraph` is imported redundantly
[INFO] [stdout]    --> core/src/algorithm/max_flow.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     use super::*;
[INFO] [stdout]     |         -------- the item `DirectedGraph` is already imported here
[INFO] [stdout] 232 |     use crate::directed_graph::DirectedGraph;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Edge` is imported redundantly
[INFO] [stdout]  --> core/src/directed_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::graph::Edge;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 | use crate::graph::*;
[INFO] [stdout]   |     --------------- the item `Edge` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> core/src/iter/iter_best.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     use std::iter::Iterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> core/src/iter/iter_breadth.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     use std::iter::Iterator;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> core/src/iter/iter_depth.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |     use std::iter::Iterator;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking gc-command v0.1.0 (/opt/rustwide/workdir/command)
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> command/src/graph_utils.rs:60:35
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(io_err) => Err(io_err.description().to_string()),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> command/src/graph_utils.rs:60:35
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(io_err) => Err(io_err.description().to_string()),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const OVERALL_SCORE: &str = "{score}";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OVERALL_SCORE_SHORT: &str = "%S";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NODE_ID: &str = "{id}";
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const NODE_ID_SHORT: &str = "%i";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `REPEAT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const REPEAT: &str = "...";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const OVERALL_SCORE: &str = "{score}";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OVERALL_SCORE_SHORT: &str = "%S";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NODE_ID: &str = "{id}";
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const NODE_ID_SHORT: &str = "%i";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `REPEAT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const REPEAT: &str = "...";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> command/src/bin/gc-random.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 |     use gc_core::search::a_star;;
[INFO] [stdout]     |                                 ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:306:14
[INFO] [stdout]     |
[INFO] [stdout] 306 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 306 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 306 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:312:14
[INFO] [stdout]     |
[INFO] [stdout] 312 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 312 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 312 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:315:14
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 315 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 315 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |     for c in constraint_ordered {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 282 |     while let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 282 |     if let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:285:14
[INFO] [stdout]     |
[INFO] [stdout] 285 |     for c in constraint_include_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     while let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 285 |     if let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:288:14
[INFO] [stdout]     |
[INFO] [stdout] 288 |     for c in constraint_no_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 288 |     while let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 288 |     if let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 291 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 291 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:294:14
[INFO] [stdout]     |
[INFO] [stdout] 294 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 294 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:300:14
[INFO] [stdout]     |
[INFO] [stdout] 300 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 300 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 300 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> command/src/bin/gc-random.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:306:14
[INFO] [stdout]     |
[INFO] [stdout] 306 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 306 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 306 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:312:14
[INFO] [stdout]     |
[INFO] [stdout] 312 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 312 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 312 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:315:14
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 315 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 315 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 |     use gc_core::search::a_star;;
[INFO] [stdout]     |                                 ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |     for c in constraint_ordered {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 282 |     while let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 282 |     if let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:285:14
[INFO] [stdout]     |
[INFO] [stdout] 285 |     for c in constraint_include_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     while let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 285 |     if let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:288:14
[INFO] [stdout]     |
[INFO] [stdout] 288 |     for c in constraint_no_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 288 |     while let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 288 |     if let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 291 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 291 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:294:14
[INFO] [stdout]     |
[INFO] [stdout] 294 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 294 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:300:14
[INFO] [stdout]     |
[INFO] [stdout] 300 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 300 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 300 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "78dffa11a72037866ebd81920ac9c87391634d50e197645d2da7532fbd13aed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78dffa11a72037866ebd81920ac9c87391634d50e197645d2da7532fbd13aed2", kill_on_drop: false }`
[INFO] [stdout] 78dffa11a72037866ebd81920ac9c87391634d50e197645d2da7532fbd13aed2
[INFO] checking christheblog/graph-commands against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristheblog%2Fgraph-commands" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/christheblog/graph-commands on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/christheblog/graph-commands
[INFO] finished tweaking git repo https://github.com/christheblog/graph-commands
[INFO] tweaked toml for git repo https://github.com/christheblog/graph-commands written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/christheblog/graph-commands 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 68b6ffd9b5122d75b9f7079b4390b433a2084f6aaa34364dcaa67bbf85f82093
[INFO] running `Command { std: "docker" "start" "-a" "68b6ffd9b5122d75b9f7079b4390b433a2084f6aaa34364dcaa67bbf85f82093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68b6ffd9b5122d75b9f7079b4390b433a2084f6aaa34364dcaa67bbf85f82093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68b6ffd9b5122d75b9f7079b4390b433a2084f6aaa34364dcaa67bbf85f82093", kill_on_drop: false }`
[INFO] [stdout] 68b6ffd9b5122d75b9f7079b4390b433a2084f6aaa34364dcaa67bbf85f82093
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3fb9f9ac28f9a46d2455f452d1c3aa8df702c5d8af0534919083118603df2fe
[INFO] running `Command { std: "docker" "start" "-a" "f3fb9f9ac28f9a46d2455f452d1c3aa8df702c5d8af0534919083118603df2fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.3.5
[INFO] [stderr]     Checking gc-core v0.1.0 (/opt/rustwide/workdir/core)
[INFO] [stdout] warning: the item `Edge` is imported redundantly
[INFO] [stdout]  --> core/src/directed_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::graph::Edge;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 | use crate::graph::*;
[INFO] [stdout]   |     --------------- the item `Edge` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> core/src/algorithm/hamiltonian.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     use std::iter::Iterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DirectedGraph` is imported redundantly
[INFO] [stdout]    --> core/src/algorithm/max_flow.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     use super::*;
[INFO] [stdout]     |         -------- the item `DirectedGraph` is already imported here
[INFO] [stdout] 232 |     use crate::directed_graph::DirectedGraph;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Edge` is imported redundantly
[INFO] [stdout]  --> core/src/directed_graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::graph::Edge;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 | use crate::graph::*;
[INFO] [stdout]   |     --------------- the item `Edge` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> core/src/iter/iter_best.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     use std::iter::Iterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> core/src/iter/iter_breadth.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     use std::iter::Iterator;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]    --> core/src/iter/iter_depth.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |     use std::iter::Iterator;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking gc-command v0.1.0 (/opt/rustwide/workdir/command)
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> command/src/graph_utils.rs:60:35
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(io_err) => Err(io_err.description().to_string()),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const OVERALL_SCORE: &str = "{score}";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OVERALL_SCORE_SHORT: &str = "%S";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NODE_ID: &str = "{id}";
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const NODE_ID_SHORT: &str = "%i";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `REPEAT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const REPEAT: &str = "...";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> command/src/graph_utils.rs:60:35
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(io_err) => Err(io_err.description().to_string()),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const OVERALL_SCORE: &str = "{score}";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OVERALL_SCORE_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OVERALL_SCORE_SHORT: &str = "%S";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NODE_ID: &str = "{id}";
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_ID_SHORT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const NODE_ID_SHORT: &str = "%i";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `REPEAT` is never used
[INFO] [stdout]  --> command/src/path_formatter.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const REPEAT: &str = "...";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 |     use gc_core::search::a_star;;
[INFO] [stdout]     |                                 ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |     for c in constraint_ordered {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 282 |     while let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 282 |     if let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:285:14
[INFO] [stdout]     |
[INFO] [stdout] 285 |     for c in constraint_include_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     while let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 285 |     if let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:288:14
[INFO] [stdout]     |
[INFO] [stdout] 288 |     for c in constraint_no_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 288 |     while let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 288 |     if let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 291 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 291 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:294:14
[INFO] [stdout]     |
[INFO] [stdout] 294 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 294 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:300:14
[INFO] [stdout]     |
[INFO] [stdout] 300 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 300 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 300 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:306:14
[INFO] [stdout]     |
[INFO] [stdout] 306 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 306 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 306 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:312:14
[INFO] [stdout]     |
[INFO] [stdout] 312 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 312 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 312 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:315:14
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 315 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 315 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> command/src/bin/gc-random.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> command/src/bin/gc-random.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 |     use gc_core::search::a_star;;
[INFO] [stdout]     |                                 ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:306:14
[INFO] [stdout]     |
[INFO] [stdout] 306 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 306 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 306 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:312:14
[INFO] [stdout]     |
[INFO] [stdout] 312 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 312 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 312 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-cycle.rs:315:14
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 315 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 315 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |     for c in constraint_ordered {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 282 |     while let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 282 |     if let Some(c) = constraint_ordered {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:285:14
[INFO] [stdout]     |
[INFO] [stdout] 285 |     for c in constraint_include_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 285 |     while let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 285 |     if let Some(c) = constraint_include_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:288:14
[INFO] [stdout]     |
[INFO] [stdout] 288 |     for c in constraint_no_cycle {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 288 |     while let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 288 |     if let Some(c) = constraint_no_cycle {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     for c in constraint_min_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 291 |     while let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 291 |     if let Some(c) = constraint_min_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:294:14
[INFO] [stdout]     |
[INFO] [stdout] 294 |     for c in constraint_max_length {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 294 |     while let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if let Some(c) = constraint_max_length {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:300:14
[INFO] [stdout]     |
[INFO] [stdout] 300 |     for c in constraint_min_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 300 |     while let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 300 |     if let Some(c) = constraint_min_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> command/src/bin/gc-csp.rs:303:14
[INFO] [stdout]     |
[INFO] [stdout] 303 |     for c in constraint_max_score {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 303 |     while let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~~~~ ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 303 |     if let Some(c) = constraint_max_score {
[INFO] [stdout]     |     ~~~~~~~~~~~~ ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.26s
[INFO] running `Command { std: "docker" "inspect" "f3fb9f9ac28f9a46d2455f452d1c3aa8df702c5d8af0534919083118603df2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3fb9f9ac28f9a46d2455f452d1c3aa8df702c5d8af0534919083118603df2fe", kill_on_drop: false }`
[INFO] [stdout] f3fb9f9ac28f9a46d2455f452d1c3aa8df702c5d8af0534919083118603df2fe