[INFO] cloning repository https://github.com/willbeason/diffeq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/willbeason/diffeq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillbeason%2Fdiffeq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillbeason%2Fdiffeq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ad709ab1f26862124d7698e85ed550e0b1a22faa
[INFO] checking willbeason/diffeq against try#e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837 for pr-143619
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillbeason%2Fdiffeq" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/willbeason/diffeq
[INFO] finished tweaking git repo https://github.com/willbeason/diffeq
[INFO] tweaked toml for git repo https://github.com/willbeason/diffeq written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/willbeason/diffeq on toolchain e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/willbeason/diffeq 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" "+e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5bd0fe0e128b2161a258b97a8faa14f20d515938cb94301d01b969c30019aaa
[INFO] running `Command { std: "docker" "start" "-a" "e5bd0fe0e128b2161a258b97a8faa14f20d515938cb94301d01b969c30019aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5bd0fe0e128b2161a258b97a8faa14f20d515938cb94301d01b969c30019aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5bd0fe0e128b2161a258b97a8faa14f20d515938cb94301d01b969c30019aaa", kill_on_drop: false }`
[INFO] [stdout] e5bd0fe0e128b2161a258b97a8faa14f20d515938cb94301d01b969c30019aaa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e784c10fc2dd34bf2bb7b1e51117e35d3f9c5837" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44457912d9bb017cc05a445ada8b7010c98dc31eae8377def93bccf3c6d9e83d
[INFO] running `Command { std: "docker" "start" "-a" "44457912d9bb017cc05a445ada8b7010c98dc31eae8377def93bccf3c6d9e83d", kill_on_drop: false }`
[INFO] [stderr]     Checking diffeq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `eq`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let eq = equations::O1 {
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_eq`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eq`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let eq = equations::O1 {
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_eq`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `f` is never read
[INFO] [stdout]  --> src/equations.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct O1 {
[INFO] [stdout]   |            -- field in this struct
[INFO] [stdout] 2 |     pub f: fn(p: (f64, f64)) -> f64
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `euler` and `rk4` are never used
[INFO] [stdout]   --> src/equations.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl O1 {
[INFO] [stdout]    | ------- methods in this implementation
[INFO] [stdout] 6  |     pub fn euler(self, p: (f64, f64), h: f64) -> f64 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub fn rk4(self, p: (f64, f64), h: f64) -> f64 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `O3` is never constructed
[INFO] [stdout]   --> src/equations.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct O3 {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `euler` is never used
[INFO] [stdout]   --> src/equations.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl O3 {
[INFO] [stdout]    | ------- method in this implementation
[INFO] [stdout] 34 |     pub fn euler(self, p: (f64, f64, f64, f64), h: f64) -> (f64, f64, f64) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `f` is never read
[INFO] [stdout]  --> src/equations.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct O1 {
[INFO] [stdout]   |            -- field in this struct
[INFO] [stdout] 2 |     pub f: fn(p: (f64, f64)) -> f64
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `euler` and `rk4` are never used
[INFO] [stdout]   --> src/equations.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl O1 {
[INFO] [stdout]    | ------- methods in this implementation
[INFO] [stdout] 6  |     pub fn euler(self, p: (f64, f64), h: f64) -> f64 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub fn rk4(self, p: (f64, f64), h: f64) -> f64 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `O3` is never constructed
[INFO] [stdout]   --> src/equations.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct O3 {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `euler` is never used
[INFO] [stdout]   --> src/equations.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl O3 {
[INFO] [stdout]    | ------- method in this implementation
[INFO] [stdout] 34 |     pub fn euler(self, p: (f64, f64, f64, f64), h: f64) -> (f64, f64, f64) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "44457912d9bb017cc05a445ada8b7010c98dc31eae8377def93bccf3c6d9e83d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44457912d9bb017cc05a445ada8b7010c98dc31eae8377def93bccf3c6d9e83d", kill_on_drop: false }`
[INFO] [stdout] 44457912d9bb017cc05a445ada8b7010c98dc31eae8377def93bccf3c6d9e83d