[INFO] fetching crate stringer 0.1.6...
[INFO] testing stringer-0.1.6 against 1.55.0 for beta-1.56-1
[INFO] extracting crate stringer 0.1.6 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate stringer 0.1.6 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 crates.io crate stringer 0.1.6
[INFO] finished tweaking crates.io crate stringer 0.1.6
[INFO] tweaked toml for crates.io crate stringer 0.1.6 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 53603697f5fc111227ee31eb9800d6b95adcefb90189bb57142f218801b3693f
[INFO] running `Command { std: "docker" "start" "-a" "53603697f5fc111227ee31eb9800d6b95adcefb90189bb57142f218801b3693f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53603697f5fc111227ee31eb9800d6b95adcefb90189bb57142f218801b3693f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53603697f5fc111227ee31eb9800d6b95adcefb90189bb57142f218801b3693f", kill_on_drop: false }`
[INFO] [stdout] 53603697f5fc111227ee31eb9800d6b95adcefb90189bb57142f218801b3693f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 6bb04c4a6a54b62c500aa54b52e1ac4755109eab3924753b1d9f2bd7e79a32a5
[INFO] running `Command { std: "docker" "start" "-a" "6bb04c4a6a54b62c500aa54b52e1ac4755109eab3924753b1d9f2bd7e79a32a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringer v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "6bb04c4a6a54b62c500aa54b52e1ac4755109eab3924753b1d9f2bd7e79a32a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bb04c4a6a54b62c500aa54b52e1ac4755109eab3924753b1d9f2bd7e79a32a5", kill_on_drop: false }`
[INFO] [stdout] 6bb04c4a6a54b62c500aa54b52e1ac4755109eab3924753b1d9f2bd7e79a32a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 338f622de55c598f370008c3249c906d40751fac4767074a34a036788648db5b
[INFO] running `Command { std: "docker" "start" "-a" "338f622de55c598f370008c3249c906d40751fac4767074a34a036788648db5b", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringer v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "338f622de55c598f370008c3249c906d40751fac4767074a34a036788648db5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "338f622de55c598f370008c3249c906d40751fac4767074a34a036788648db5b", kill_on_drop: false }`
[INFO] [stdout] 338f622de55c598f370008c3249c906d40751fac4767074a34a036788648db5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 72bbd471e1b6f34f15d7c891918dff2f2d524cb2de3ad9927497fef40ebd2c8c
[INFO] running `Command { std: "docker" "start" "-a" "72bbd471e1b6f34f15d7c891918dff2f2d524cb2de3ad9927497fef40ebd2c8c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stringer-6f3b8ebda27a09e3)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stringer
[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] running `Command { std: "docker" "inspect" "72bbd471e1b6f34f15d7c891918dff2f2d524cb2de3ad9927497fef40ebd2c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72bbd471e1b6f34f15d7c891918dff2f2d524cb2de3ad9927497fef40ebd2c8c", kill_on_drop: false }`
[INFO] [stdout] 72bbd471e1b6f34f15d7c891918dff2f2d524cb2de3ad9927497fef40ebd2c8c