[INFO] crate accel-derive 0.2.0 is already in cache
[INFO] extracting crate accel-derive 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/accel-derive/0.2.0
[INFO] extracting crate accel-derive 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/accel-derive/0.2.0
[INFO] validating manifest of accel-derive-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 accel-derive-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 accel-derive-0.2.0
[INFO] finished frobbing accel-derive-0.2.0
[INFO] frobbed toml for accel-derive-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/accel-derive/0.2.0/Cargo.toml
[INFO] started frobbing accel-derive-0.2.0
[INFO] finished frobbing accel-derive-0.2.0
[INFO] frobbed toml for accel-derive-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/accel-derive/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 accel-derive-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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/accel-derive/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] 075326ba5cc1f377d4b2c9fa885f1f8814dc962f63ba551c2e13166c15576b05
[INFO] running `"docker" "start" "-a" "075326ba5cc1f377d4b2c9fa885f1f8814dc962f63ba551c2e13166c15576b05"`
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling derive_more v0.10.0
[INFO] [stderr]    Compiling nvptx v0.1.0
[INFO] [stderr]    Compiling accel-derive v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[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 `accel-derive`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "075326ba5cc1f377d4b2c9fa885f1f8814dc962f63ba551c2e13166c15576b05"`
[INFO] running `"docker" "rm" "-f" "075326ba5cc1f377d4b2c9fa885f1f8814dc962f63ba551c2e13166c15576b05"`
[INFO] [stdout] 075326ba5cc1f377d4b2c9fa885f1f8814dc962f63ba551c2e13166c15576b05