[INFO] cloning repository https://github.com/LadderTheory/euler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LadderTheory/euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c73179646f0e0041e923031344c4de4a158a5d1
[INFO] checking LadderTheory/euler against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler" "/workspace/builds/worker-45/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-45/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LadderTheory/euler on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LadderTheory/euler
[INFO] finished tweaking git repo https://github.com/LadderTheory/euler
[INFO] tweaked toml for git repo https://github.com/LadderTheory/euler written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] crate git repo https://github.com/LadderTheory/euler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15550caa9433e48f9a731aff497720a16ffa5b56e5f32cbfae35c8815c6a3d5f
[INFO] running `Command { std: "docker" "start" "-a" "15550caa9433e48f9a731aff497720a16ffa5b56e5f32cbfae35c8815c6a3d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15550caa9433e48f9a731aff497720a16ffa5b56e5f32cbfae35c8815c6a3d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15550caa9433e48f9a731aff497720a16ffa5b56e5f32cbfae35c8815c6a3d5f", kill_on_drop: false }`
[INFO] [stdout] 15550caa9433e48f9a731aff497720a16ffa5b56e5f32cbfae35c8815c6a3d5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 651136ffb7a833957e2532209932f1c530c11cebf269fbd6260f7c6c9377462a
[INFO] running `Command { std: "docker" "start" "-a" "651136ffb7a833957e2532209932f1c530c11cebf269fbd6260f7c6c9377462a", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking euler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `acc`
[INFO] [stdout]    --> src/main.rs:531:32
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_acc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:531:38
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                    ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:531:40
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `acc`
[INFO] [stdout]    --> src/main.rs:531:32
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_acc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:531:38
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                    ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:531:40
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.96s
[INFO] running `Command { std: "docker" "inspect" "651136ffb7a833957e2532209932f1c530c11cebf269fbd6260f7c6c9377462a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "651136ffb7a833957e2532209932f1c530c11cebf269fbd6260f7c6c9377462a", kill_on_drop: false }`
[INFO] [stdout] 651136ffb7a833957e2532209932f1c530c11cebf269fbd6260f7c6c9377462a