[INFO] crate wake-on-lan 0.2.0 is already in cache
[INFO] extracting crate wake-on-lan 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/wake-on-lan/0.2.0
[INFO] extracting crate wake-on-lan 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wake-on-lan/0.2.0
[INFO] validating manifest of wake-on-lan-0.2.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of wake-on-lan-0.2.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing wake-on-lan-0.2.0
[INFO] finished frobbing wake-on-lan-0.2.0
[INFO] frobbed toml for wake-on-lan-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/wake-on-lan/0.2.0/Cargo.toml
[INFO] started frobbing wake-on-lan-0.2.0
[INFO] finished frobbing wake-on-lan-0.2.0
[INFO] frobbed toml for wake-on-lan-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wake-on-lan/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing wake-on-lan-0.2.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/wake-on-lan/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 358f55f11e4ad096b57c1b4adc69848fc060228ff37606fe49e1158abafa59fd
[INFO] running `"docker" "start" "-a" "358f55f11e4ad096b57c1b4adc69848fc060228ff37606fe49e1158abafa59fd"`
[INFO] [stderr]    Compiling wake-on-lan v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "358f55f11e4ad096b57c1b4adc69848fc060228ff37606fe49e1158abafa59fd"`
[INFO] running `"docker" "rm" "-f" "358f55f11e4ad096b57c1b4adc69848fc060228ff37606fe49e1158abafa59fd"`
[INFO] [stdout] 358f55f11e4ad096b57c1b4adc69848fc060228ff37606fe49e1158abafa59fd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/wake-on-lan/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4b634a5e2940a29a1d47afa5cefee4f3d5e5ba95b2ca581a75a01a69c4a3ff71
[INFO] running `"docker" "start" "-a" "4b634a5e2940a29a1d47afa5cefee4f3d5e5ba95b2ca581a75a01a69c4a3ff71"`
[INFO] [stderr]    Compiling wake-on-lan v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "4b634a5e2940a29a1d47afa5cefee4f3d5e5ba95b2ca581a75a01a69c4a3ff71"`
[INFO] running `"docker" "rm" "-f" "4b634a5e2940a29a1d47afa5cefee4f3d5e5ba95b2ca581a75a01a69c4a3ff71"`
[INFO] [stdout] 4b634a5e2940a29a1d47afa5cefee4f3d5e5ba95b2ca581a75a01a69c4a3ff71
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/wake-on-lan/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 284026e3b29b02858fa3be494cbd77779b60cbaf9950b3e6baaed59423d7f847
[INFO] running `"docker" "start" "-a" "284026e3b29b02858fa3be494cbd77779b60cbaf9950b3e6baaed59423d7f847"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/wake_on_lan-9473741991b86610
[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] [stderr]    Doc-tests wake-on-lan
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 5) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs -  (line 5) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | magic_packet.send()?;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs -  (line 5)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "284026e3b29b02858fa3be494cbd77779b60cbaf9950b3e6baaed59423d7f847"`
[INFO] running `"docker" "rm" "-f" "284026e3b29b02858fa3be494cbd77779b60cbaf9950b3e6baaed59423d7f847"`
[INFO] [stdout] 284026e3b29b02858fa3be494cbd77779b60cbaf9950b3e6baaed59423d7f847