[INFO] cloning repository https://github.com/pie-flavor/romeo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pie-flavor/romeo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpie-flavor%2Fromeo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpie-flavor%2Fromeo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3766ceec1360ed3365e3d836d26c23b564c73571
[INFO] testing pie-flavor/romeo against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpie-flavor%2Fromeo" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pie-flavor/romeo on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pie-flavor/romeo
[INFO] finished tweaking git repo https://github.com/pie-flavor/romeo
[INFO] tweaked toml for git repo https://github.com/pie-flavor/romeo written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/pie-flavor/romeo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59d82e5a5f419a503b052955ae9c68f04d313a9a94d0c2137b3e9b07dcb3168e
[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" "59d82e5a5f419a503b052955ae9c68f04d313a9a94d0c2137b3e9b07dcb3168e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59d82e5a5f419a503b052955ae9c68f04d313a9a94d0c2137b3e9b07dcb3168e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59d82e5a5f419a503b052955ae9c68f04d313a9a94d0c2137b3e9b07dcb3168e", kill_on_drop: false }`
[INFO] [stdout] 59d82e5a5f419a503b052955ae9c68f04d313a9a94d0c2137b3e9b07dcb3168e
[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=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c640a7bd83856e6468c03b2b487a33a060f8859d70c975c89f0a10165ba333c5
[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" "c640a7bd83856e6468c03b2b487a33a060f8859d70c975c89f0a10165ba333c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling byteorder v1.2.6
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling sha1 v0.2.0
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling safemem v0.3.0
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling base64 v0.8.0
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling smallvec v0.6.5
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stdout] error[E0740]: unions may not contain fields that need dropping
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-0.6.5/lib.rs:271:5
[INFO] [stdout]     |
[INFO] [stdout] 271 |     inline: A,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: `std::mem::ManuallyDrop` can be used to wrap the type
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-0.6.5/lib.rs:271:5
[INFO] [stdout]     |
[INFO] [stdout] 271 |     inline: A,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr] error: could not compile `smallvec`.
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0740`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c640a7bd83856e6468c03b2b487a33a060f8859d70c975c89f0a10165ba333c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c640a7bd83856e6468c03b2b487a33a060f8859d70c975c89f0a10165ba333c5", kill_on_drop: false }`
[INFO] [stdout] c640a7bd83856e6468c03b2b487a33a060f8859d70c975c89f0a10165ba333c5