[INFO] fetching crate problem-spec 0.2.0...
[INFO] building problem-spec-0.2.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate problem-spec 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate problem-spec 0.2.0
[INFO] finished tweaking crates.io crate problem-spec 0.2.0
[INFO] tweaked toml for crates.io crate problem-spec 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate problem-spec 0.2.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate problem-spec 0.2.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.204
[INFO] [stderr]   Downloaded bon v2.3.0
[INFO] [stderr]   Downloaded bon-macros v2.3.0
[INFO] [stderr]   Downloaded serde v1.0.204
[INFO] [stderr]   Downloaded serde_json v1.0.120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d33d83dd274f40594e3e2ac613c167a506c1364d7131a0477bb75c08f1032ded
[INFO] running `Command { std: "docker" "start" "-a" "d33d83dd274f40594e3e2ac613c167a506c1364d7131a0477bb75c08f1032ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d33d83dd274f40594e3e2ac613c167a506c1364d7131a0477bb75c08f1032ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d33d83dd274f40594e3e2ac613c167a506c1364d7131a0477bb75c08f1032ded", kill_on_drop: false }`
[INFO] [stdout] d33d83dd274f40594e3e2ac613c167a506c1364d7131a0477bb75c08f1032ded
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3d337da5fb0077b3c60f44d55c3d07432ffcd44330dce136074650ca5cfbe06
[INFO] running `Command { std: "docker" "start" "-a" "f3d337da5fb0077b3c60f44d55c3d07432ffcd44330dce136074650ca5cfbe06", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling serde v1.0.204
[INFO] [stderr]    Compiling serde_json v1.0.120
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]    Compiling serde_derive v1.0.204
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]    Compiling bon-macros v2.3.0
[INFO] [stderr]    Compiling bon v2.3.0
[INFO] [stderr]    Compiling problem-spec v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/problem_spec.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl ExtraKv {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn insert(mut self, k: &str, v: &str) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Severity` is never used
[INFO] [stdout]  --> src/problem.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Severity {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProblemSpec` is never constructed
[INFO] [stdout]   --> src/problem.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct ProblemSpec<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.42s
[INFO] running `Command { std: "docker" "inspect" "f3d337da5fb0077b3c60f44d55c3d07432ffcd44330dce136074650ca5cfbe06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3d337da5fb0077b3c60f44d55c3d07432ffcd44330dce136074650ca5cfbe06", kill_on_drop: false }`
[INFO] [stdout] f3d337da5fb0077b3c60f44d55c3d07432ffcd44330dce136074650ca5cfbe06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af0ccd090eb81d4e7c00c668a51f22ef83b4516cde97165347a473e6d1b4a7fe
[INFO] running `Command { std: "docker" "start" "-a" "af0ccd090eb81d4e7c00c668a51f22ef83b4516cde97165347a473e6d1b4a7fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling problem-spec v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/problem_spec.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl ExtraKv {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn insert(mut self, k: &str, v: &str) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Severity` is never used
[INFO] [stdout]  --> src/problem.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Severity {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProblemSpec` is never constructed
[INFO] [stdout]   --> src/problem.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct ProblemSpec<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> src/problem_spec.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/problem_spec.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl ExtraKv {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn insert(mut self, k: &str, v: &str) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Severity` is never used
[INFO] [stdout]  --> src/problem.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Severity {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "af0ccd090eb81d4e7c00c668a51f22ef83b4516cde97165347a473e6d1b4a7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af0ccd090eb81d4e7c00c668a51f22ef83b4516cde97165347a473e6d1b4a7fe", kill_on_drop: false }`
[INFO] [stdout] af0ccd090eb81d4e7c00c668a51f22ef83b4516cde97165347a473e6d1b4a7fe