[INFO] crate string_concat 0.0.1 is already in cache
[INFO] testing string_concat-0.0.1 against 1.45.2 for beta-1.46-1
[INFO] extracting crate string_concat 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate string_concat 0.0.1 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate string_concat 0.0.1
[INFO] finished tweaking crates.io crate string_concat 0.0.1
[INFO] tweaked toml for crates.io crate string_concat 0.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13bca1d452fc690aa529503da47008beb6ae4bc48cdece6ac62e5325331b66d7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "13bca1d452fc690aa529503da47008beb6ae4bc48cdece6ac62e5325331b66d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13bca1d452fc690aa529503da47008beb6ae4bc48cdece6ac62e5325331b66d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13bca1d452fc690aa529503da47008beb6ae4bc48cdece6ac62e5325331b66d7", kill_on_drop: false }`
[INFO] [stdout] 13bca1d452fc690aa529503da47008beb6ae4bc48cdece6ac62e5325331b66d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2d5de7bfd35d8d0cf97eefaf686aca392aa886d7598079bbaeca7abea259dbe
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c2d5de7bfd35d8d0cf97eefaf686aca392aa886d7598079bbaeca7abea259dbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling string_concat v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "c2d5de7bfd35d8d0cf97eefaf686aca392aa886d7598079bbaeca7abea259dbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2d5de7bfd35d8d0cf97eefaf686aca392aa886d7598079bbaeca7abea259dbe", kill_on_drop: false }`
[INFO] [stdout] c2d5de7bfd35d8d0cf97eefaf686aca392aa886d7598079bbaeca7abea259dbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa3b250e7a9fa0f50ef708a2a68fd1c4f7bdef444f8b1aa88898106d0cdb5e20
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fa3b250e7a9fa0f50ef708a2a68fd1c4f7bdef444f8b1aa88898106d0cdb5e20", kill_on_drop: false }`
[INFO] [stderr]    Compiling string_concat v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "fa3b250e7a9fa0f50ef708a2a68fd1c4f7bdef444f8b1aa88898106d0cdb5e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa3b250e7a9fa0f50ef708a2a68fd1c4f7bdef444f8b1aa88898106d0cdb5e20", kill_on_drop: false }`
[INFO] [stdout] fa3b250e7a9fa0f50ef708a2a68fd1c4f7bdef444f8b1aa88898106d0cdb5e20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9d2b952684f6c65f9e03b7d8aa1b7fa99e8131c3102cc978cd1359af5b1ad4ba
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9d2b952684f6c65f9e03b7d8aa1b7fa99e8131c3102cc978cd1359af5b1ad4ba", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/string_concat-d496f86d1dfe4957
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::it_works_more_complicated ... ok
[INFO] [stdout] test tests::it_works_with_stringss ... ok
[INFO] [stdout] test tests::it_works_with_str ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests string_concat
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9d2b952684f6c65f9e03b7d8aa1b7fa99e8131c3102cc978cd1359af5b1ad4ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d2b952684f6c65f9e03b7d8aa1b7fa99e8131c3102cc978cd1359af5b1ad4ba", kill_on_drop: false }`
[INFO] [stdout] 9d2b952684f6c65f9e03b7d8aa1b7fa99e8131c3102cc978cd1359af5b1ad4ba