[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] checking pie-flavor/romeo against try#bb9dbf1d07454a99066eabaabd5819851281494b for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpie-flavor%2Fromeo" "/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/pie-flavor/romeo on toolchain bb9dbf1d07454a99066eabaabd5819851281494b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "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-3/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" "+bb9dbf1d07454a99066eabaabd5819851281494b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.4.7
[INFO] [stderr]   Downloaded serde v1.0.79
[INFO] [stderr]   Downloaded hyper-native-tls v0.2.4
[INFO] [stderr]   Downloaded base64 v0.8.0
[INFO] [stderr]   Downloaded miniz-sys v0.1.10
[INFO] [stderr]   Downloaded memchr v2.1.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.1.2
[INFO] [stderr]   Downloaded evzht9h3nznqzwl v0.0.3
[INFO] [stderr]   Downloaded schannel v0.1.13
[INFO] [stderr]   Downloaded syn v0.15.6
[INFO] [stderr]   Downloaded flate2 v1.0.2
[INFO] [stderr]   Downloaded openssl-sys v0.9.36
[INFO] [stderr]   Downloaded multipart v0.13.6
[INFO] [stderr]   Downloaded serde_json v1.0.30
[INFO] [stderr]   Downloaded clippy_lints v0.0.212
[INFO] [stderr]   Downloaded clippy v0.0.212
[INFO] [stderr]   Downloaded mime_guess v1.8.6
[INFO] [stderr]   Downloaded serenity v0.5.9
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1497a22b63c65e0083b39ff4d914573dd75f578ae53d2905086460fc7911722
[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" "b1497a22b63c65e0083b39ff4d914573dd75f578ae53d2905086460fc7911722", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1497a22b63c65e0083b39ff4d914573dd75f578ae53d2905086460fc7911722", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1497a22b63c65e0083b39ff4d914573dd75f578ae53d2905086460fc7911722", kill_on_drop: false }`
[INFO] [stdout] b1497a22b63c65e0083b39ff4d914573dd75f578ae53d2905086460fc7911722
[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=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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a7eda701eb8d14071f906cb699b57abce41ac194676636c569a19d0e444557f
[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" "4a7eda701eb8d14071f906cb699b57abce41ac194676636c569a19d0e444557f", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking antidote v1.0.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.36
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking ryu v0.2.6
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking url v1.7.1
[INFO] [stderr]     Checking toml v0.4.7
[INFO] [stderr]     Checking phf_shared v0.7.23
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking base64 v0.8.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking log v0.3.9
[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]     Checking serde_json v1.0.30
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0740`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec`
[INFO] [stderr] 
[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" "4a7eda701eb8d14071f906cb699b57abce41ac194676636c569a19d0e444557f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a7eda701eb8d14071f906cb699b57abce41ac194676636c569a19d0e444557f", kill_on_drop: false }`
[INFO] [stdout] 4a7eda701eb8d14071f906cb699b57abce41ac194676636c569a19d0e444557f