[INFO] fetching crate drone-stm32-map-pieces-3 0.10.1...
[INFO] checking drone-stm32-map-pieces-3-0.10.1 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate drone-stm32-map-pieces-3 0.10.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate drone-stm32-map-pieces-3 0.10.1 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate drone-stm32-map-pieces-3 0.10.1
[INFO] finished tweaking crates.io crate drone-stm32-map-pieces-3 0.10.1
[INFO] tweaked toml for crates.io crate drone-stm32-map-pieces-3 0.10.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=allow" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e95ba1196207f082856b71e8693a2256927096de15e3a6c83f225a883cf4384d
[INFO] running `"docker" "start" "-a" "e95ba1196207f082856b71e8693a2256927096de15e3a6c83f225a883cf4384d"`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling if_chain v1.0.0
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking drone-ctypes v0.10.1
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling drone-macros-core v0.10.1
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling serde-xml-rs v0.2.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling drone-cortex-m-macros v0.10.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling drone-stm32-map-svd v0.10.1
[INFO] [stderr]    Compiling drone-config v0.10.1
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling drone-stm32-map-pieces-3 v0.10.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling drone-core-macros v0.10.1
[INFO] [stderr]     Checking drone-core v0.10.1
[INFO] [stderr] error[E0740]: unions may not contain fields that need dropping
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/drone-core-0.10.1/src/proc_loop.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     cmd: Cmd,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: `std::mem::ManuallyDrop` can be used to wrap the type
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/drone-core-0.10.1/src/proc_loop.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     cmd: Cmd,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0740`.
[INFO] [stderr] error: could not compile `drone-core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e95ba1196207f082856b71e8693a2256927096de15e3a6c83f225a883cf4384d"`
[INFO] running `"docker" "rm" "-f" "e95ba1196207f082856b71e8693a2256927096de15e3a6c83f225a883cf4384d"`
[INFO] [stdout] e95ba1196207f082856b71e8693a2256927096de15e3a6c83f225a883cf4384d