[INFO] cloning repository https://github.com/Adorine/exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Adorine/exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdorine%2Fexercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdorine%2Fexercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5311b8fb39ed1e550388a5ed5a2a4c5c6bd9c392
[INFO] testing Adorine/exercise against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdorine%2Fexercise" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Adorine/exercise on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Adorine/exercise
[INFO] finished tweaking git repo https://github.com/Adorine/exercise
[INFO] tweaked toml for git repo https://github.com/Adorine/exercise written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Adorine/exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] beab0392d8d55016bf1f45082fbfcc4588cb2253b910dc0a8742f0a06997cf1e
[INFO] running `Command { std: "docker" "start" "-a" "beab0392d8d55016bf1f45082fbfcc4588cb2253b910dc0a8742f0a06997cf1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "beab0392d8d55016bf1f45082fbfcc4588cb2253b910dc0a8742f0a06997cf1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beab0392d8d55016bf1f45082fbfcc4588cb2253b910dc0a8742f0a06997cf1e", kill_on_drop: false }`
[INFO] [stdout] beab0392d8d55016bf1f45082fbfcc4588cb2253b910dc0a8742f0a06997cf1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e725ddaacdee9ba5bdc9fee983e9add4b49af31327b0587c7c5a996618363471
[INFO] running `Command { std: "docker" "start" "-a" "e725ddaacdee9ba5bdc9fee983e9add4b49af31327b0587c7c5a996618363471", kill_on_drop: false }`
[INFO] [stderr]    Compiling substrate_exercise4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "e725ddaacdee9ba5bdc9fee983e9add4b49af31327b0587c7c5a996618363471", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e725ddaacdee9ba5bdc9fee983e9add4b49af31327b0587c7c5a996618363471", kill_on_drop: false }`
[INFO] [stdout] e725ddaacdee9ba5bdc9fee983e9add4b49af31327b0587c7c5a996618363471
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53fbf1165026003706803461308e5818fe52bcb792346a49c3ed820eba06262d
[INFO] running `Command { std: "docker" "start" "-a" "53fbf1165026003706803461308e5818fe52bcb792346a49c3ed820eba06262d", kill_on_drop: false }`
[INFO] [stderr]    Compiling substrate_exercise4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "53fbf1165026003706803461308e5818fe52bcb792346a49c3ed820eba06262d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53fbf1165026003706803461308e5818fe52bcb792346a49c3ed820eba06262d", kill_on_drop: false }`
[INFO] [stdout] 53fbf1165026003706803461308e5818fe52bcb792346a49c3ed820eba06262d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 295451af37b6c125e0c03530313088d9c0198270ebbb57b0a37bb5eb4a7073a0
[INFO] running `Command { std: "docker" "start" "-a" "295451af37b6c125e0c03530313088d9c0198270ebbb57b0a37bb5eb4a7073a0", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/substrate_exercise4-33b02b0ab614bc13)
[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" "295451af37b6c125e0c03530313088d9c0198270ebbb57b0a37bb5eb4a7073a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "295451af37b6c125e0c03530313088d9c0198270ebbb57b0a37bb5eb4a7073a0", kill_on_drop: false }`
[INFO] [stdout] 295451af37b6c125e0c03530313088d9c0198270ebbb57b0a37bb5eb4a7073a0