[INFO] crate zju-jw-parser 0.1.5 is already in cache
[INFO] extracting crate zju-jw-parser 0.1.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/zju-jw-parser/0.1.5
[INFO] extracting crate zju-jw-parser 0.1.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/zju-jw-parser/0.1.5
[INFO] validating manifest of zju-jw-parser-0.1.5 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 zju-jw-parser-0.1.5 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 zju-jw-parser-0.1.5
[INFO] finished frobbing zju-jw-parser-0.1.5
[INFO] frobbed toml for zju-jw-parser-0.1.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/zju-jw-parser/0.1.5/Cargo.toml
[INFO] started frobbing zju-jw-parser-0.1.5
[INFO] finished frobbing zju-jw-parser-0.1.5
[INFO] frobbed toml for zju-jw-parser-0.1.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/zju-jw-parser/0.1.5/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing zju-jw-parser-0.1.5 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/zju-jw-parser/0.1.5:/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] 6c1cfe300b47a232431b1d3932d921c859c02722563f3f258054455f8ef7e677
[INFO] running `"docker" "start" "-a" "6c1cfe300b47a232431b1d3932d921c859c02722563f3f258054455f8ef7e677"`
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling ego-tree v0.6.0
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling selectors v0.21.0
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling reformation_derive v0.4.1
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling reformation v0.4.1
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling scraper v0.10.1
[INFO] [stderr]    Compiling unhtml v0.6.1
[INFO] [stderr]    Compiling unhtml_derive v0.5.2
[INFO] [stderr]    Compiling zju-jw-parser v0.1.5 (/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(custom_attribute)]
[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 `zju-jw-parser`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6c1cfe300b47a232431b1d3932d921c859c02722563f3f258054455f8ef7e677"`
[INFO] running `"docker" "rm" "-f" "6c1cfe300b47a232431b1d3932d921c859c02722563f3f258054455f8ef7e677"`
[INFO] [stdout] 6c1cfe300b47a232431b1d3932d921c859c02722563f3f258054455f8ef7e677