[INFO] cloning repository https://github.com/jcmorrow/set_3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jcmorrow/set_3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcmorrow%2Fset_3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcmorrow%2Fset_3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 902aa6f2d203a64735caf422cbc6a7300ced6b48
[INFO] testing jcmorrow/set_3 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcmorrow%2Fset_3" "/workspace/builds/worker-85/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-85/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jcmorrow/set_3 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jcmorrow/set_3
[INFO] finished tweaking git repo https://github.com/jcmorrow/set_3
[INFO] tweaked toml for git repo https://github.com/jcmorrow/set_3 written to /workspace/builds/worker-85/source/Cargo.toml
[INFO] crate git repo https://github.com/jcmorrow/set_3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64714f1f3c98da1211bc0d261c16588d51954b8a4957c744751e01eb93f3a930
[INFO] running `Command { std: "docker" "start" "-a" "64714f1f3c98da1211bc0d261c16588d51954b8a4957c744751e01eb93f3a930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64714f1f3c98da1211bc0d261c16588d51954b8a4957c744751e01eb93f3a930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64714f1f3c98da1211bc0d261c16588d51954b8a4957c744751e01eb93f3a930", kill_on_drop: false }`
[INFO] [stdout] 64714f1f3c98da1211bc0d261c16588d51954b8a4957c744751e01eb93f3a930
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7ed7bbec5887c0badd8853427f4d044791527955eab63de33245935c87feb03
[INFO] running `Command { std: "docker" "start" "-a" "f7ed7bbec5887c0badd8853427f4d044791527955eab63de33245935c87feb03", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling challenge_17 v0.1.0 (/opt/rustwide/workdir/challenge_17)
[INFO] [stderr]    Compiling challenge_20 v0.1.0 (/opt/rustwide/workdir/challenge_20)
[INFO] [stderr]    Compiling challenge_19 v0.1.0 (/opt/rustwide/workdir/challenge_19)
[INFO] [stderr]    Compiling challenge_18 v0.1.0 (/opt/rustwide/workdir/challenge_18)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> challenge_20/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for i in 0..624 {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.88s
[INFO] running `Command { std: "docker" "inspect" "f7ed7bbec5887c0badd8853427f4d044791527955eab63de33245935c87feb03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7ed7bbec5887c0badd8853427f4d044791527955eab63de33245935c87feb03", kill_on_drop: false }`
[INFO] [stdout] f7ed7bbec5887c0badd8853427f4d044791527955eab63de33245935c87feb03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77a8f6b3dde0c5fa86b058925c3057a4c33d60a6407f8de89e5d06e23580d2c4
[INFO] running `Command { std: "docker" "start" "-a" "77a8f6b3dde0c5fa86b058925c3057a4c33d60a6407f8de89e5d06e23580d2c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling challenge_17 v0.1.0 (/opt/rustwide/workdir/challenge_17)
[INFO] [stderr]    Compiling challenge_19 v0.1.0 (/opt/rustwide/workdir/challenge_19)
[INFO] [stderr]    Compiling challenge_20 v0.1.0 (/opt/rustwide/workdir/challenge_20)
[INFO] [stderr]    Compiling challenge_18 v0.1.0 (/opt/rustwide/workdir/challenge_18)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> challenge_20/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for i in 0..624 {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "77a8f6b3dde0c5fa86b058925c3057a4c33d60a6407f8de89e5d06e23580d2c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77a8f6b3dde0c5fa86b058925c3057a4c33d60a6407f8de89e5d06e23580d2c4", kill_on_drop: false }`
[INFO] [stdout] 77a8f6b3dde0c5fa86b058925c3057a4c33d60a6407f8de89e5d06e23580d2c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fc967f672e606b2e9137decbdbf93567312a7bd5be722cab97fdbf66b7e6c694
[INFO] running `Command { std: "docker" "start" "-a" "fc967f672e606b2e9137decbdbf93567312a7bd5be722cab97fdbf66b7e6c694", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> challenge_20/src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for i in 0..624 {
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `challenge_20` (bin "challenge_20" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/challenge_17-b931a51e257a6b7b)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_combine_blocks ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/challenge_17-0bdd0fefcec7e2cc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/challenge_18-8f93b11538858d53)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/challenge_19-f7545b599c22f327)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/challenge_20-f9c409df715e3e0b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests challenge_17
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fc967f672e606b2e9137decbdbf93567312a7bd5be722cab97fdbf66b7e6c694", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc967f672e606b2e9137decbdbf93567312a7bd5be722cab97fdbf66b7e6c694", kill_on_drop: false }`
[INFO] [stdout] fc967f672e606b2e9137decbdbf93567312a7bd5be722cab97fdbf66b7e6c694