[INFO] crate seq-macro 0.1.4 is already in cache
[INFO] extracting crate seq-macro 0.1.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/seq-macro/0.1.4
[INFO] extracting crate seq-macro 0.1.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/seq-macro/0.1.4
[INFO] validating manifest of seq-macro-0.1.4 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 seq-macro-0.1.4 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 seq-macro-0.1.4
[INFO] finished frobbing seq-macro-0.1.4
[INFO] frobbed toml for seq-macro-0.1.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/seq-macro/0.1.4/Cargo.toml
[INFO] started frobbing seq-macro-0.1.4
[INFO] finished frobbing seq-macro-0.1.4
[INFO] frobbed toml for seq-macro-0.1.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/seq-macro/0.1.4/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 seq-macro-0.1.4 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/seq-macro/0.1.4:/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] f40fb512c47c458b858d0699998558311ae2f47e2bcedf9521cd9bb4fd72261f
[INFO] running `"docker" "start" "-a" "f40fb512c47c458b858d0699998558311ae2f47e2bcedf9521cd9bb4fd72261f"`
[INFO] [stderr]    Compiling seq-macro v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:86:25
[INFO] [stderr]    |
[INFO] [stderr] 86 |     type IntoIter = Box<Iterator<Item = u64>>;
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = u64>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "f40fb512c47c458b858d0699998558311ae2f47e2bcedf9521cd9bb4fd72261f"`
[INFO] running `"docker" "rm" "-f" "f40fb512c47c458b858d0699998558311ae2f47e2bcedf9521cd9bb4fd72261f"`
[INFO] [stdout] f40fb512c47c458b858d0699998558311ae2f47e2bcedf9521cd9bb4fd72261f
[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/seq-macro/0.1.4:/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] 0b3f6459c4e7c13a0261a59cb446499c5526671e78868dac22ed181cbe4a7c4c
[INFO] running `"docker" "start" "-a" "0b3f6459c4e7c13a0261a59cb446499c5526671e78868dac22ed181cbe4a7c4c"`
[INFO] [stderr]    Compiling seq-macro v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:86:25
[INFO] [stderr]    |
[INFO] [stderr] 86 |     type IntoIter = Box<Iterator<Item = u64>>;
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = u64>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> tests/test_group.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_hygiene)]
[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 E0554`.
[INFO] [stderr] error: Could not compile `seq-macro`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0b3f6459c4e7c13a0261a59cb446499c5526671e78868dac22ed181cbe4a7c4c"`
[INFO] running `"docker" "rm" "-f" "0b3f6459c4e7c13a0261a59cb446499c5526671e78868dac22ed181cbe4a7c4c"`
[INFO] [stdout] 0b3f6459c4e7c13a0261a59cb446499c5526671e78868dac22ed181cbe4a7c4c