[INFO] updating cached repository jkcclemens/path
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jkcclemens/path
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jkcclemens/path" "work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/jkcclemens/path"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/jkcclemens/path'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jkcclemens/path" "work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/jkcclemens/path"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/jkcclemens/path'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 22a1ec38b04636bcabe78fe182a3bb1ae8fb77f7
[INFO] sha for GitHub repo jkcclemens/path: 22a1ec38b04636bcabe78fe182a3bb1ae8fb77f7
[INFO] validating manifest of jkcclemens/path on toolchain master#2bde39b8edce6463e1c37f8a8082a875e7b536b1
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jkcclemens/path on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jkcclemens/path
[INFO] finished frobbing jkcclemens/path
[INFO] frobbed toml for jkcclemens/path written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/jkcclemens/path/Cargo.toml
[INFO] started frobbing jkcclemens/path
[INFO] finished frobbing jkcclemens/path
[INFO] frobbed toml for jkcclemens/path written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/jkcclemens/path/Cargo.toml
[INFO] crate jkcclemens/path has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jkcclemens/path against master#2bde39b8edce6463e1c37f8a8082a875e7b536b1 for pr-57483
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57483/worker-6/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/jkcclemens/path:/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=forbid" "-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" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c69f0fbe51fb6446f46c1c2522fd2cf8ea388af7867e0e7720ed1232f48f685d
[INFO] running `"docker" "start" "-a" "c69f0fbe51fb6446f46c1c2522fd2cf8ea388af7867e0e7720ed1232f48f685d"`
[INFO] [stderr]    Compiling gcc v0.3.40
[INFO] [stderr]     Checking rustc-demangle v0.1.3
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]     Checking number_prefix v0.2.7
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]     Checking clap v2.19.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]     Checking backtrace v0.2.3
[INFO] [stderr]     Checking error-chain v0.2.2
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling serde_codegen v0.8.21
[INFO] [stderr]    Compiling serde_derive v0.8.21
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-0.8.21/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro, proc_macro_lib)]
[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 `serde_derive`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c69f0fbe51fb6446f46c1c2522fd2cf8ea388af7867e0e7720ed1232f48f685d"`
[INFO] running `"docker" "rm" "-f" "c69f0fbe51fb6446f46c1c2522fd2cf8ea388af7867e0e7720ed1232f48f685d"`
[INFO] [stdout] c69f0fbe51fb6446f46c1c2522fd2cf8ea388af7867e0e7720ed1232f48f685d